# HG changeset patch
# User Jaroslav Tulach <jaroslav.tulach@apidesign.org>
# Date 1372270273 -7200
# Node ID 17ca7fe5c486519916d2a006fe42441ffe10818c
# Parent  316fc30638a68a531240373c43ecabfbdd8eef67
ko-fx tests are passing now

diff -r 316fc30638a6 -r 17ca7fe5c486 ko/fx/src/main/resources/org/apidesign/bck2brwsr/kofx/knockout-2.2.1.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ko/fx/src/main/resources/org/apidesign/bck2brwsr/kofx/knockout-2.2.1.js	Wed Jun 26 20:11:13 2013 +0200
@@ -0,0 +1,3594 @@
+// Knockout JavaScript library v2.2.1
+// (c) Steven Sanderson - http://knockoutjs.com/
+// License: MIT (http://www.opensource.org/licenses/mit-license.php)
+
+(function(){
+var DEBUG=true;
+(function(window,document,navigator,jQuery,undefined){
+!function(factory) {
+    // Support three module loading scenarios
+    if (typeof require === 'function' && typeof exports === 'object' && typeof module === 'object') {
+        // [1] CommonJS/Node.js
+        var target = module['exports'] || exports; // module.exports is for Node.js
+        factory(target);
+    } else if (typeof define === 'function' && define['amd']) {
+        // [2] AMD anonymous module
+        define(['exports'], factory);
+    } else {
+        // [3] No module loader (plain <script> tag) - put directly in global namespace
+        factory(window['ko'] = {});
+    }
+}(function(koExports){
+// Internally, all KO objects are attached to koExports (even the non-exported ones whose names will be minified by the closure compiler).
+// In the future, the following "ko" variable may be made distinct from "koExports" so that private objects are not externally reachable.
+var ko = typeof koExports !== 'undefined' ? koExports : {};
+// Google Closure Compiler helpers (used only to make the minified file smaller)
+ko.exportSymbol = function(koPath, object) {
+	var tokens = koPath.split(".");
+
+	// In the future, "ko" may become distinct from "koExports" (so that non-exported objects are not reachable)
+	// At that point, "target" would be set to: (typeof koExports !== "undefined" ? koExports : ko)
+	var target = ko;
+
+	for (var i = 0; i < tokens.length - 1; i++)
+		target = target[tokens[i]];
+	target[tokens[tokens.length - 1]] = object;
+};
+ko.exportProperty = function(owner, publicName, object) {
+  owner[publicName] = object;
+};
+ko.version = "2.2.1";
+
+ko.exportSymbol('version', ko.version);
+ko.utils = new (function () {
+    var stringTrimRegex = /^(\s|\u00A0)+|(\s|\u00A0)+$/g;
+
+    // Represent the known event types in a compact way, then at runtime transform it into a hash with event name as key (for fast lookup)
+    var knownEvents = {}, knownEventTypesByEventName = {};
+    var keyEventTypeName = /Firefox\/2/i.test(navigator.userAgent) ? 'KeyboardEvent' : 'UIEvents';
+    knownEvents[keyEventTypeName] = ['keyup', 'keydown', 'keypress'];
+    knownEvents['MouseEvents'] = ['click', 'dblclick', 'mousedown', 'mouseup', 'mousemove', 'mouseover', 'mouseout', 'mouseenter', 'mouseleave'];
+    for (var eventType in knownEvents) {
+        var knownEventsForType = knownEvents[eventType];
+        if (knownEventsForType.length) {
+            for (var i = 0, j = knownEventsForType.length; i < j; i++)
+                knownEventTypesByEventName[knownEventsForType[i]] = eventType;
+        }
+    }
+    var eventsThatMustBeRegisteredUsingAttachEvent = { 'propertychange': true }; // Workaround for an IE9 issue - https://github.com/SteveSanderson/knockout/issues/406
+
+    // Detect IE versions for bug workarounds (uses IE conditionals, not UA string, for robustness)
+    // Note that, since IE 10 does not support conditional comments, the following logic only detects IE < 10.
+    // Currently this is by design, since IE 10+ behaves correctly when treated as a standard browser.
+    // If there is a future need to detect specific versions of IE10+, we will amend this.
+    var ieVersion = (function() {
+        var version = 3, div = document.createElement('div'), iElems = div.getElementsByTagName('i');
+
+        // Keep constructing conditional HTML blocks until we hit one that resolves to an empty fragment
+        while (
+            div.innerHTML = '<!--[if gt IE ' + (++version) + ']><i></i><![endif]-->',
+            iElems[0]
+        );
+        return version > 4 ? version : undefined;
+    }());
+    var isIe6 = ieVersion === 6,
+        isIe7 = ieVersion === 7;
+
+    function isClickOnCheckableElement(element, eventType) {
+        if ((ko.utils.tagNameLower(element) !== "input") || !element.type) return false;
+        if (eventType.toLowerCase() != "click") return false;
+        var inputType = element.type;
+        return (inputType == "checkbox") || (inputType == "radio");
+    }
+
+    return {
+        fieldsIncludedWithJsonPost: ['authenticity_token', /^__RequestVerificationToken(_.*)?$/],
+
+        arrayForEach: function (array, action) {
+            for (var i = 0, j = array.length; i < j; i++)
+                action(array[i]);
+        },
+
+        arrayIndexOf: function (array, item) {
+            if (typeof Array.prototype.indexOf == "function")
+                return Array.prototype.indexOf.call(array, item);
+            for (var i = 0, j = array.length; i < j; i++)
+                if (array[i] === item)
+                    return i;
+            return -1;
+        },
+
+        arrayFirst: function (array, predicate, predicateOwner) {
+            for (var i = 0, j = array.length; i < j; i++)
+                if (predicate.call(predicateOwner, array[i]))
+                    return array[i];
+            return null;
+        },
+
+        arrayRemoveItem: function (array, itemToRemove) {
+            var index = ko.utils.arrayIndexOf(array, itemToRemove);
+            if (index >= 0)
+                array.splice(index, 1);
+        },
+
+        arrayGetDistinctValues: function (array) {
+            array = array || [];
+            var result = [];
+            for (var i = 0, j = array.length; i < j; i++) {
+                if (ko.utils.arrayIndexOf(result, array[i]) < 0)
+                    result.push(array[i]);
+            }
+            return result;
+        },
+
+        arrayMap: function (array, mapping) {
+            array = array || [];
+            var result = [];
+            for (var i = 0, j = array.length; i < j; i++)
+                result.push(mapping(array[i]));
+            return result;
+        },
+
+        arrayFilter: function (array, predicate) {
+            array = array || [];
+            var result = [];
+            for (var i = 0, j = array.length; i < j; i++)
+                if (predicate(array[i]))
+                    result.push(array[i]);
+            return result;
+        },
+
+        arrayPushAll: function (array, valuesToPush) {
+            if (valuesToPush instanceof Array)
+                array.push.apply(array, valuesToPush);
+            else
+                for (var i = 0, j = valuesToPush.length; i < j; i++)
+                    array.push(valuesToPush[i]);
+            return array;
+        },
+
+        extend: function (target, source) {
+            if (source) {
+                for(var prop in source) {
+                    if(source.hasOwnProperty(prop)) {
+                        target[prop] = source[prop];
+                    }
+                }
+            }
+            return target;
+        },
+
+        emptyDomNode: function (domNode) {
+            while (domNode.firstChild) {
+                ko.removeNode(domNode.firstChild);
+            }
+        },
+
+        moveCleanedNodesToContainerElement: function(nodes) {
+            // Ensure it's a real array, as we're about to reparent the nodes and
+            // we don't want the underlying collection to change while we're doing that.
+            var nodesArray = ko.utils.makeArray(nodes);
+
+            var container = document.createElement('div');
+            for (var i = 0, j = nodesArray.length; i < j; i++) {
+                container.appendChild(ko.cleanNode(nodesArray[i]));
+            }
+            return container;
+        },
+
+        cloneNodes: function (nodesArray, shouldCleanNodes) {
+            for (var i = 0, j = nodesArray.length, newNodesArray = []; i < j; i++) {
+                var clonedNode = nodesArray[i].cloneNode(true);
+                newNodesArray.push(shouldCleanNodes ? ko.cleanNode(clonedNode) : clonedNode);
+            }
+            return newNodesArray;
+        },
+
+        setDomNodeChildren: function (domNode, childNodes) {
+            ko.utils.emptyDomNode(domNode);
+            if (childNodes) {
+                for (var i = 0, j = childNodes.length; i < j; i++)
+                    domNode.appendChild(childNodes[i]);
+            }
+        },
+
+        replaceDomNodes: function (nodeToReplaceOrNodeArray, newNodesArray) {
+            var nodesToReplaceArray = nodeToReplaceOrNodeArray.nodeType ? [nodeToReplaceOrNodeArray] : nodeToReplaceOrNodeArray;
+            if (nodesToReplaceArray.length > 0) {
+                var insertionPoint = nodesToReplaceArray[0];
+                var parent = insertionPoint.parentNode;
+                for (var i = 0, j = newNodesArray.length; i < j; i++)
+                    parent.insertBefore(newNodesArray[i], insertionPoint);
+                for (var i = 0, j = nodesToReplaceArray.length; i < j; i++) {
+                    ko.removeNode(nodesToReplaceArray[i]);
+                }
+            }
+        },
+
+        setOptionNodeSelectionState: function (optionNode, isSelected) {
+            // IE6 sometimes throws "unknown error" if you try to write to .selected directly, whereas Firefox struggles with setAttribute. Pick one based on browser.
+            if (ieVersion < 7)
+                optionNode.setAttribute("selected", isSelected);
+            else
+                optionNode.selected = isSelected;
+        },
+
+        stringTrim: function (string) {
+            return (string || "").replace(stringTrimRegex, "");
+        },
+
+        stringTokenize: function (string, delimiter) {
+            var result = [];
+            var tokens = (string || "").split(delimiter);
+            for (var i = 0, j = tokens.length; i < j; i++) {
+                var trimmed = ko.utils.stringTrim(tokens[i]);
+                if (trimmed !== "")
+                    result.push(trimmed);
+            }
+            return result;
+        },
+
+        stringStartsWith: function (string, startsWith) {
+            string = string || "";
+            if (startsWith.length > string.length)
+                return false;
+            return string.substring(0, startsWith.length) === startsWith;
+        },
+
+        domNodeIsContainedBy: function (node, containedByNode) {
+            if (containedByNode.compareDocumentPosition)
+                return (containedByNode.compareDocumentPosition(node) & 16) == 16;
+            while (node != null) {
+                if (node == containedByNode)
+                    return true;
+                node = node.parentNode;
+            }
+            return false;
+        },
+
+        domNodeIsAttachedToDocument: function (node) {
+            return ko.utils.domNodeIsContainedBy(node, node.ownerDocument);
+        },
+
+        tagNameLower: function(element) {
+            // For HTML elements, tagName will always be upper case; for XHTML elements, it'll be lower case.
+            // Possible future optimization: If we know it's an element from an XHTML document (not HTML),
+            // we don't need to do the .toLowerCase() as it will always be lower case anyway.
+            return element && element.tagName && element.tagName.toLowerCase();
+        },
+
+        registerEventHandler: function (element, eventType, handler) {
+            var mustUseAttachEvent = ieVersion && eventsThatMustBeRegisteredUsingAttachEvent[eventType];
+            if (!mustUseAttachEvent && typeof jQuery != "undefined") {
+                if (isClickOnCheckableElement(element, eventType)) {
+                    // For click events on checkboxes, jQuery interferes with the event handling in an awkward way:
+                    // it toggles the element checked state *after* the click event handlers run, whereas native
+                    // click events toggle the checked state *before* the event handler.
+                    // Fix this by intecepting the handler and applying the correct checkedness before it runs.
+                    var originalHandler = handler;
+                    handler = function(event, eventData) {
+                        var jQuerySuppliedCheckedState = this.checked;
+                        if (eventData)
+                            this.checked = eventData.checkedStateBeforeEvent !== true;
+                        originalHandler.call(this, event);
+                        this.checked = jQuerySuppliedCheckedState; // Restore the state jQuery applied
+                    };
+                }
+                jQuery(element)['bind'](eventType, handler);
+            } else if (!mustUseAttachEvent && typeof element.addEventListener == "function")
+                element.addEventListener(eventType, handler, false);
+            else if (typeof element.attachEvent != "undefined")
+                element.attachEvent("on" + eventType, function (event) {
+                    handler.call(element, event);
+                });
+            else
+                throw new Error("Browser doesn't support addEventListener or attachEvent");
+        },
+
+        triggerEvent: function (element, eventType) {
+            if (!(element && element.nodeType))
+                throw new Error("element must be a DOM node when calling triggerEvent");
+
+            if (typeof jQuery != "undefined") {
+                var eventData = [];
+                if (isClickOnCheckableElement(element, eventType)) {
+                    // Work around the jQuery "click events on checkboxes" issue described above by storing the original checked state before triggering the handler
+                    eventData.push({ checkedStateBeforeEvent: element.checked });
+                }
+                jQuery(element)['trigger'](eventType, eventData);
+            } else if (typeof document.createEvent == "function") {
+                if (typeof element.dispatchEvent == "function") {
+                    var eventCategory = knownEventTypesByEventName[eventType] || "HTMLEvents";
+                    var event = document.createEvent(eventCategory);
+                    event.initEvent(eventType, true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, element);
+                    element.dispatchEvent(event);
+                }
+                else
+                    throw new Error("The supplied element doesn't support dispatchEvent");
+            } else if (typeof element.fireEvent != "undefined") {
+                // Unlike other browsers, IE doesn't change the checked state of checkboxes/radiobuttons when you trigger their "click" event
+                // so to make it consistent, we'll do it manually here
+                if (isClickOnCheckableElement(element, eventType))
+                    element.checked = element.checked !== true;
+                element.fireEvent("on" + eventType);
+            }
+            else
+                throw new Error("Browser doesn't support triggering events");
+        },
+
+        unwrapObservable: function (value) {
+            return ko.isObservable(value) ? value() : value;
+        },
+
+        peekObservable: function (value) {
+            return ko.isObservable(value) ? value.peek() : value;
+        },
+
+        toggleDomNodeCssClass: function (node, classNames, shouldHaveClass) {
+            if (classNames) {
+                var cssClassNameRegex = /[\w-]+/g,
+                    currentClassNames = node.className.match(cssClassNameRegex) || [];
+                ko.utils.arrayForEach(classNames.match(cssClassNameRegex), function(className) {
+                    var indexOfClass = ko.utils.arrayIndexOf(currentClassNames, className);
+                    if (indexOfClass >= 0) {
+                        if (!shouldHaveClass)
+                            currentClassNames.splice(indexOfClass, 1);
+                    } else {
+                        if (shouldHaveClass)
+                            currentClassNames.push(className);
+                    }
+                });
+                node.className = currentClassNames.join(" ");
+            }
+        },
+
+        setTextContent: function(element, textContent) {
+            var value = ko.utils.unwrapObservable(textContent);
+            if ((value === null) || (value === undefined))
+                value = "";
+
+            if (element.nodeType === 3) {
+                element.data = value;
+            } else {
+                // We need there to be exactly one child: a text node.
+                // If there are no children, more than one, or if it's not a text node,
+                // we'll clear everything and create a single text node.
+                var innerTextNode = ko.virtualElements.firstChild(element);
+                if (!innerTextNode || innerTextNode.nodeType != 3 || ko.virtualElements.nextSibling(innerTextNode)) {
+                    ko.virtualElements.setDomNodeChildren(element, [document.createTextNode(value)]);
+                } else {
+                    innerTextNode.data = value;
+                }
+
+                ko.utils.forceRefresh(element);
+            }
+        },
+
+        setElementName: function(element, name) {
+            element.name = name;
+
+            // Workaround IE 6/7 issue
+            // - https://github.com/SteveSanderson/knockout/issues/197
+            // - http://www.matts411.com/post/setting_the_name_attribute_in_ie_dom/
+            if (ieVersion <= 7) {
+                try {
+                    element.mergeAttributes(document.createElement("<input name='" + element.name + "'/>"), false);
+                }
+                catch(e) {} // For IE9 with doc mode "IE9 Standards" and browser mode "IE9 Compatibility View"
+            }
+        },
+
+        forceRefresh: function(node) {
+            // Workaround for an IE9 rendering bug - https://github.com/SteveSanderson/knockout/issues/209
+            if (ieVersion >= 9) {
+                // For text nodes and comment nodes (most likely virtual elements), we will have to refresh the container
+                var elem = node.nodeType == 1 ? node : node.parentNode;
+                if (elem.style)
+                    elem.style.zoom = elem.style.zoom;
+            }
+        },
+
+        ensureSelectElementIsRenderedCorrectly: function(selectElement) {
+            // Workaround for IE9 rendering bug - it doesn't reliably display all the text in dynamically-added select boxes unless you force it to re-render by updating the width.
+            // (See https://github.com/SteveSanderson/knockout/issues/312, http://stackoverflow.com/questions/5908494/select-only-shows-first-char-of-selected-option)
+            if (ieVersion >= 9) {
+                var originalWidth = selectElement.style.width;
+                selectElement.style.width = 0;
+                selectElement.style.width = originalWidth;
+            }
+        },
+
+        range: function (min, max) {
+            min = ko.utils.unwrapObservable(min);
+            max = ko.utils.unwrapObservable(max);
+            var result = [];
+            for (var i = min; i <= max; i++)
+                result.push(i);
+            return result;
+        },
+
+        makeArray: function(arrayLikeObject) {
+            var result = [];
+            for (var i = 0, j = arrayLikeObject.length; i < j; i++) {
+                result.push(arrayLikeObject[i]);
+            };
+            return result;
+        },
+
+        isIe6 : isIe6,
+        isIe7 : isIe7,
+        ieVersion : ieVersion,
+
+        getFormFields: function(form, fieldName) {
+            var fields = ko.utils.makeArray(form.getElementsByTagName("input")).concat(ko.utils.makeArray(form.getElementsByTagName("textarea")));
+            var isMatchingField = (typeof fieldName == 'string')
+                ? function(field) { return field.name === fieldName }
+                : function(field) { return fieldName.test(field.name) }; // Treat fieldName as regex or object containing predicate
+            var matches = [];
+            for (var i = fields.length - 1; i >= 0; i--) {
+                if (isMatchingField(fields[i]))
+                    matches.push(fields[i]);
+            };
+            return matches;
+        },
+
+        parseJson: function (jsonString) {
+            if (typeof jsonString == "string") {
+                jsonString = ko.utils.stringTrim(jsonString);
+                if (jsonString) {
+                    if (window.JSON && window.JSON.parse) // Use native parsing where available
+                        return window.JSON.parse(jsonString);
+                    return (new Function("return " + jsonString))(); // Fallback on less safe parsing for older browsers
+                }
+            }
+            return null;
+        },
+
+        stringifyJson: function (data, replacer, space) {   // replacer and space are optional
+            if ((typeof JSON == "undefined") || (typeof JSON.stringify == "undefined"))
+                throw new Error("Cannot find JSON.stringify(). Some browsers (e.g., IE < 8) don't support it natively, but you can overcome this by adding a script reference to json2.js, downloadable from http://www.json.org/json2.js");
+            return JSON.stringify(ko.utils.unwrapObservable(data), replacer, space);
+        },
+
+        postJson: function (urlOrForm, data, options) {
+            options = options || {};
+            var params = options['params'] || {};
+            var includeFields = options['includeFields'] || this.fieldsIncludedWithJsonPost;
+            var url = urlOrForm;
+
+            // If we were given a form, use its 'action' URL and pick out any requested field values
+            if((typeof urlOrForm == 'object') && (ko.utils.tagNameLower(urlOrForm) === "form")) {
+                var originalForm = urlOrForm;
+                url = originalForm.action;
+                for (var i = includeFields.length - 1; i >= 0; i--) {
+                    var fields = ko.utils.getFormFields(originalForm, includeFields[i]);
+                    for (var j = fields.length - 1; j >= 0; j--)
+                        params[fields[j].name] = fields[j].value;
+                }
+            }
+
+            data = ko.utils.unwrapObservable(data);
+            var form = document.createElement("form");
+            form.style.display = "none";
+            form.action = url;
+            form.method = "post";
+            for (var key in data) {
+                var input = document.createElement("input");
+                input.name = key;
+                input.value = ko.utils.stringifyJson(ko.utils.unwrapObservable(data[key]));
+                form.appendChild(input);
+            }
+            for (var key in params) {
+                var input = document.createElement("input");
+                input.name = key;
+                input.value = params[key];
+                form.appendChild(input);
+            }
+            document.body.appendChild(form);
+            options['submitter'] ? options['submitter'](form) : form.submit();
+            setTimeout(function () { form.parentNode.removeChild(form); }, 0);
+        }
+    }
+})();
+
+ko.exportSymbol('utils', ko.utils);
+ko.exportSymbol('utils.arrayForEach', ko.utils.arrayForEach);
+ko.exportSymbol('utils.arrayFirst', ko.utils.arrayFirst);
+ko.exportSymbol('utils.arrayFilter', ko.utils.arrayFilter);
+ko.exportSymbol('utils.arrayGetDistinctValues', ko.utils.arrayGetDistinctValues);
+ko.exportSymbol('utils.arrayIndexOf', ko.utils.arrayIndexOf);
+ko.exportSymbol('utils.arrayMap', ko.utils.arrayMap);
+ko.exportSymbol('utils.arrayPushAll', ko.utils.arrayPushAll);
+ko.exportSymbol('utils.arrayRemoveItem', ko.utils.arrayRemoveItem);
+ko.exportSymbol('utils.extend', ko.utils.extend);
+ko.exportSymbol('utils.fieldsIncludedWithJsonPost', ko.utils.fieldsIncludedWithJsonPost);
+ko.exportSymbol('utils.getFormFields', ko.utils.getFormFields);
+ko.exportSymbol('utils.peekObservable', ko.utils.peekObservable);
+ko.exportSymbol('utils.postJson', ko.utils.postJson);
+ko.exportSymbol('utils.parseJson', ko.utils.parseJson);
+ko.exportSymbol('utils.registerEventHandler', ko.utils.registerEventHandler);
+ko.exportSymbol('utils.stringifyJson', ko.utils.stringifyJson);
+ko.exportSymbol('utils.range', ko.utils.range);
+ko.exportSymbol('utils.toggleDomNodeCssClass', ko.utils.toggleDomNodeCssClass);
+ko.exportSymbol('utils.triggerEvent', ko.utils.triggerEvent);
+ko.exportSymbol('utils.unwrapObservable', ko.utils.unwrapObservable);
+
+if (!Function.prototype['bind']) {
+    // Function.prototype.bind is a standard part of ECMAScript 5th Edition (December 2009, http://www.ecma-international.org/publications/files/ECMA-ST/ECMA-262.pdf)
+    // In case the browser doesn't implement it natively, provide a JavaScript implementation. This implementation is based on the one in prototype.js
+    Function.prototype['bind'] = function (object) {
+        var originalFunction = this, args = Array.prototype.slice.call(arguments), object = args.shift();
+        return function () {
+            return originalFunction.apply(object, args.concat(Array.prototype.slice.call(arguments)));
+        };
+    };
+}
+
+ko.utils.domData = new (function () {
+    var uniqueId = 0;
+    var dataStoreKeyExpandoPropertyName = "__ko__" + (new Date).getTime();
+    var dataStore = {};
+    return {
+        get: function (node, key) {
+            var allDataForNode = ko.utils.domData.getAll(node, false);
+            return allDataForNode === undefined ? undefined : allDataForNode[key];
+        },
+        set: function (node, key, value) {
+            if (value === undefined) {
+                // Make sure we don't actually create a new domData key if we are actually deleting a value
+                if (ko.utils.domData.getAll(node, false) === undefined)
+                    return;
+            }
+            var allDataForNode = ko.utils.domData.getAll(node, true);
+            allDataForNode[key] = value;
+        },
+        getAll: function (node, createIfNotFound) {
+            var dataStoreKey = node[dataStoreKeyExpandoPropertyName];
+            var hasExistingDataStore = dataStoreKey && (dataStoreKey !== "null") && dataStore[dataStoreKey];
+            if (!hasExistingDataStore) {
+                if (!createIfNotFound)
+                    return undefined;
+                dataStoreKey = node[dataStoreKeyExpandoPropertyName] = "ko" + uniqueId++;
+                dataStore[dataStoreKey] = {};
+            }
+            return dataStore[dataStoreKey];
+        },
+        clear: function (node) {
+            var dataStoreKey = node[dataStoreKeyExpandoPropertyName];
+            if (dataStoreKey) {
+                delete dataStore[dataStoreKey];
+                node[dataStoreKeyExpandoPropertyName] = null;
+                return true; // Exposing "did clean" flag purely so specs can infer whether things have been cleaned up as intended
+            }
+            return false;
+        }
+    }
+})();
+
+ko.exportSymbol('utils.domData', ko.utils.domData);
+ko.exportSymbol('utils.domData.clear', ko.utils.domData.clear); // Exporting only so specs can clear up after themselves fully
+
+ko.utils.domNodeDisposal = new (function () {
+    var domDataKey = "__ko_domNodeDisposal__" + (new Date).getTime();
+    var cleanableNodeTypes = { 1: true, 8: true, 9: true };       // Element, Comment, Document
+    var cleanableNodeTypesWithDescendants = { 1: true, 9: true }; // Element, Document
+
+    function getDisposeCallbacksCollection(node, createIfNotFound) {
+        var allDisposeCallbacks = ko.utils.domData.get(node, domDataKey);
+        if ((allDisposeCallbacks === undefined) && createIfNotFound) {
+            allDisposeCallbacks = [];
+            ko.utils.domData.set(node, domDataKey, allDisposeCallbacks);
+        }
+        return allDisposeCallbacks;
+    }
+    function destroyCallbacksCollection(node) {
+        ko.utils.domData.set(node, domDataKey, undefined);
+    }
+
+    function cleanSingleNode(node) {
+        // Run all the dispose callbacks
+        var callbacks = getDisposeCallbacksCollection(node, false);
+        if (callbacks) {
+            callbacks = callbacks.slice(0); // Clone, as the array may be modified during iteration (typically, callbacks will remove themselves)
+            for (var i = 0; i < callbacks.length; i++)
+                callbacks[i](node);
+        }
+
+        // Also erase the DOM data
+        ko.utils.domData.clear(node);
+
+        // Special support for jQuery here because it's so commonly used.
+        // Many jQuery plugins (including jquery.tmpl) store data using jQuery's equivalent of domData
+        // so notify it to tear down any resources associated with the node & descendants here.
+        if ((typeof jQuery == "function") && (typeof jQuery['cleanData'] == "function"))
+            jQuery['cleanData']([node]);
+
+        // Also clear any immediate-child comment nodes, as these wouldn't have been found by
+        // node.getElementsByTagName("*") in cleanNode() (comment nodes aren't elements)
+        if (cleanableNodeTypesWithDescendants[node.nodeType])
+            cleanImmediateCommentTypeChildren(node);
+    }
+
+    function cleanImmediateCommentTypeChildren(nodeWithChildren) {
+        var child, nextChild = nodeWithChildren.firstChild;
+        while (child = nextChild) {
+            nextChild = child.nextSibling;
+            if (child.nodeType === 8)
+                cleanSingleNode(child);
+        }
+    }
+
+    return {
+        addDisposeCallback : function(node, callback) {
+            if (typeof callback != "function")
+                throw new Error("Callback must be a function");
+            getDisposeCallbacksCollection(node, true).push(callback);
+        },
+
+        removeDisposeCallback : function(node, callback) {
+            var callbacksCollection = getDisposeCallbacksCollection(node, false);
+            if (callbacksCollection) {
+                ko.utils.arrayRemoveItem(callbacksCollection, callback);
+                if (callbacksCollection.length == 0)
+                    destroyCallbacksCollection(node);
+            }
+        },
+
+        cleanNode : function(node) {
+            // First clean this node, where applicable
+            if (cleanableNodeTypes[node.nodeType]) {
+                cleanSingleNode(node);
+
+                // ... then its descendants, where applicable
+                if (cleanableNodeTypesWithDescendants[node.nodeType]) {
+                    // Clone the descendants list in case it changes during iteration
+                    var descendants = [];
+                    ko.utils.arrayPushAll(descendants, node.getElementsByTagName("*"));
+                    for (var i = 0, j = descendants.length; i < j; i++)
+                        cleanSingleNode(descendants[i]);
+                }
+            }
+            return node;
+        },
+
+        removeNode : function(node) {
+            ko.cleanNode(node);
+            if (node.parentNode)
+                node.parentNode.removeChild(node);
+        }
+    }
+})();
+ko.cleanNode = ko.utils.domNodeDisposal.cleanNode; // Shorthand name for convenience
+ko.removeNode = ko.utils.domNodeDisposal.removeNode; // Shorthand name for convenience
+ko.exportSymbol('cleanNode', ko.cleanNode);
+ko.exportSymbol('removeNode', ko.removeNode);
+ko.exportSymbol('utils.domNodeDisposal', ko.utils.domNodeDisposal);
+ko.exportSymbol('utils.domNodeDisposal.addDisposeCallback', ko.utils.domNodeDisposal.addDisposeCallback);
+ko.exportSymbol('utils.domNodeDisposal.removeDisposeCallback', ko.utils.domNodeDisposal.removeDisposeCallback);
+(function () {
+    var leadingCommentRegex = /^(\s*)<!--(.*?)-->/;
+
+    function simpleHtmlParse(html) {
+        // Based on jQuery's "clean" function, but only accounting for table-related elements.
+        // If you have referenced jQuery, this won't be used anyway - KO will use jQuery's "clean" function directly
+
+        // Note that there's still an issue in IE < 9 whereby it will discard comment nodes that are the first child of
+        // a descendant node. For example: "<div><!-- mycomment -->abc</div>" will get parsed as "<div>abc</div>"
+        // This won't affect anyone who has referenced jQuery, and there's always the workaround of inserting a dummy node
+        // (possibly a text node) in front of the comment. So, KO does not attempt to workaround this IE issue automatically at present.
+
+        // Trim whitespace, otherwise indexOf won't work as expected
+        var tags = ko.utils.stringTrim(html).toLowerCase(), div = document.createElement("div");
+
+        // Finds the first match from the left column, and returns the corresponding "wrap" data from the right column
+        var wrap = tags.match(/^<(thead|tbody|tfoot)/)              && [1, "<table>", "</table>"] ||
+                   !tags.indexOf("<tr")                             && [2, "<table><tbody>", "</tbody></table>"] ||
+                   (!tags.indexOf("<td") || !tags.indexOf("<th"))   && [3, "<table><tbody><tr>", "</tr></tbody></table>"] ||
+                   /* anything else */                                 [0, "", ""];
+
+        // Go to html and back, then peel off extra wrappers
+        // Note that we always prefix with some dummy text, because otherwise, IE<9 will strip out leading comment nodes in descendants. Total madness.
+        var markup = "ignored<div>" + wrap[1] + html + wrap[2] + "</div>";
+        if (typeof window['innerShiv'] == "function") {
+            div.appendChild(window['innerShiv'](markup));
+        } else {
+            div.innerHTML = markup;
+        }
+
+        // Move to the right depth
+        while (wrap[0]--)
+            div = div.lastChild;
+
+        return ko.utils.makeArray(div.lastChild.childNodes);
+    }
+
+    function jQueryHtmlParse(html) {
+        // jQuery's "parseHTML" function was introduced in jQuery 1.8.0 and is a documented public API.
+        if (jQuery['parseHTML']) {
+            return jQuery['parseHTML'](html);
+        } else {
+            // For jQuery < 1.8.0, we fall back on the undocumented internal "clean" function.
+            var elems = jQuery['clean']([html]);
+
+            // As of jQuery 1.7.1, jQuery parses the HTML by appending it to some dummy parent nodes held in an in-memory document fragment.
+            // Unfortunately, it never clears the dummy parent nodes from the document fragment, so it leaks memory over time.
+            // Fix this by finding the top-most dummy parent element, and detaching it from its owner fragment.
+            if (elems && elems[0]) {
+                // Find the top-most parent element that's a direct child of a document fragment
+                var elem = elems[0];
+                while (elem.parentNode && elem.parentNode.nodeType !== 11 /* i.e., DocumentFragment */)
+                    elem = elem.parentNode;
+                // ... then detach it
+                if (elem.parentNode)
+                    elem.parentNode.removeChild(elem);
+            }
+
+            return elems;
+        }
+    }
+
+    ko.utils.parseHtmlFragment = function(html) {
+        return typeof jQuery != 'undefined' ? jQueryHtmlParse(html)   // As below, benefit from jQuery's optimisations where possible
+                                            : simpleHtmlParse(html);  // ... otherwise, this simple logic will do in most common cases.
+    };
+
+    ko.utils.setHtml = function(node, html) {
+        ko.utils.emptyDomNode(node);
+
+        // There's no legitimate reason to display a stringified observable without unwrapping it, so we'll unwrap it
+        html = ko.utils.unwrapObservable(html);
+
+        if ((html !== null) && (html !== undefined)) {
+            if (typeof html != 'string')
+                html = html.toString();
+
+            // jQuery contains a lot of sophisticated code to parse arbitrary HTML fragments,
+            // for example <tr> elements which are not normally allowed to exist on their own.
+            // If you've referenced jQuery we'll use that rather than duplicating its code.
+            if (typeof jQuery != 'undefined') {
+                jQuery(node)['html'](html);
+            } else {
+                // ... otherwise, use KO's own parsing logic.
+                var parsedNodes = ko.utils.parseHtmlFragment(html);
+                for (var i = 0; i < parsedNodes.length; i++)
+                    node.appendChild(parsedNodes[i]);
+            }
+        }
+    };
+})();
+
+ko.exportSymbol('utils.parseHtmlFragment', ko.utils.parseHtmlFragment);
+ko.exportSymbol('utils.setHtml', ko.utils.setHtml);
+
+ko.memoization = (function () {
+    var memos = {};
+
+    function randomMax8HexChars() {
+        return (((1 + Math.random()) * 0x100000000) | 0).toString(16).substring(1);
+    }
+    function generateRandomId() {
+        return randomMax8HexChars() + randomMax8HexChars();
+    }
+    function findMemoNodes(rootNode, appendToArray) {
+        if (!rootNode)
+            return;
+        if (rootNode.nodeType == 8) {
+            var memoId = ko.memoization.parseMemoText(rootNode.nodeValue);
+            if (memoId != null)
+                appendToArray.push({ domNode: rootNode, memoId: memoId });
+        } else if (rootNode.nodeType == 1) {
+            for (var i = 0, childNodes = rootNode.childNodes, j = childNodes.length; i < j; i++)
+                findMemoNodes(childNodes[i], appendToArray);
+        }
+    }
+
+    return {
+        memoize: function (callback) {
+            if (typeof callback != "function")
+                throw new Error("You can only pass a function to ko.memoization.memoize()");
+            var memoId = generateRandomId();
+            memos[memoId] = callback;
+            return "<!--[ko_memo:" + memoId + "]-->";
+        },
+
+        unmemoize: function (memoId, callbackParams) {
+            var callback = memos[memoId];
+            if (callback === undefined)
+                throw new Error("Couldn't find any memo with ID " + memoId + ". Perhaps it's already been unmemoized.");
+            try {
+                callback.apply(null, callbackParams || []);
+                return true;
+            }
+            finally { delete memos[memoId]; }
+        },
+
+        unmemoizeDomNodeAndDescendants: function (domNode, extraCallbackParamsArray) {
+            var memos = [];
+            findMemoNodes(domNode, memos);
+            for (var i = 0, j = memos.length; i < j; i++) {
+                var node = memos[i].domNode;
+                var combinedParams = [node];
+                if (extraCallbackParamsArray)
+                    ko.utils.arrayPushAll(combinedParams, extraCallbackParamsArray);
+                ko.memoization.unmemoize(memos[i].memoId, combinedParams);
+                node.nodeValue = ""; // Neuter this node so we don't try to unmemoize it again
+                if (node.parentNode)
+                    node.parentNode.removeChild(node); // If possible, erase it totally (not always possible - someone else might just hold a reference to it then call unmemoizeDomNodeAndDescendants again)
+            }
+        },
+
+        parseMemoText: function (memoText) {
+            var match = memoText.match(/^\[ko_memo\:(.*?)\]$/);
+            return match ? match[1] : null;
+        }
+    };
+})();
+
+ko.exportSymbol('memoization', ko.memoization);
+ko.exportSymbol('memoization.memoize', ko.memoization.memoize);
+ko.exportSymbol('memoization.unmemoize', ko.memoization.unmemoize);
+ko.exportSymbol('memoization.parseMemoText', ko.memoization.parseMemoText);
+ko.exportSymbol('memoization.unmemoizeDomNodeAndDescendants', ko.memoization.unmemoizeDomNodeAndDescendants);
+ko.extenders = {
+    'throttle': function(target, timeout) {
+        // Throttling means two things:
+
+        // (1) For dependent observables, we throttle *evaluations* so that, no matter how fast its dependencies
+        //     notify updates, the target doesn't re-evaluate (and hence doesn't notify) faster than a certain rate
+        target['throttleEvaluation'] = timeout;
+
+        // (2) For writable targets (observables, or writable dependent observables), we throttle *writes*
+        //     so the target cannot change value synchronously or faster than a certain rate
+        var writeTimeoutInstance = null;
+        return ko.dependentObservable({
+            'read': target,
+            'write': function(value) {
+                clearTimeout(writeTimeoutInstance);
+                writeTimeoutInstance = setTimeout(function() {
+                    target(value);
+                }, timeout);
+            }
+        });
+    },
+
+    'notify': function(target, notifyWhen) {
+        target["equalityComparer"] = notifyWhen == "always"
+            ? function() { return false } // Treat all values as not equal
+            : ko.observable["fn"]["equalityComparer"];
+        return target;
+    }
+};
+
+function applyExtenders(requestedExtenders) {
+    var target = this;
+    if (requestedExtenders) {
+        for (var key in requestedExtenders) {
+            var extenderHandler = ko.extenders[key];
+            if (typeof extenderHandler == 'function') {
+                target = extenderHandler(target, requestedExtenders[key]);
+            }
+        }
+    }
+    return target;
+}
+
+ko.exportSymbol('extenders', ko.extenders);
+
+ko.subscription = function (target, callback, disposeCallback) {
+    this.target = target;
+    this.callback = callback;
+    this.disposeCallback = disposeCallback;
+    ko.exportProperty(this, 'dispose', this.dispose);
+};
+ko.subscription.prototype.dispose = function () {
+    this.isDisposed = true;
+    this.disposeCallback();
+};
+
+ko.subscribable = function () {
+    this._subscriptions = {};
+
+    ko.utils.extend(this, ko.subscribable['fn']);
+    ko.exportProperty(this, 'subscribe', this.subscribe);
+    ko.exportProperty(this, 'extend', this.extend);
+    ko.exportProperty(this, 'getSubscriptionsCount', this.getSubscriptionsCount);
+}
+
+var defaultEvent = "change";
+
+ko.subscribable['fn'] = {
+    subscribe: function (callback, callbackTarget, event) {
+        event = event || defaultEvent;
+        var boundCallback = callbackTarget ? callback.bind(callbackTarget) : callback;
+
+        var subscription = new ko.subscription(this, boundCallback, function () {
+            ko.utils.arrayRemoveItem(this._subscriptions[event], subscription);
+        }.bind(this));
+
+        if (!this._subscriptions[event])
+            this._subscriptions[event] = [];
+        this._subscriptions[event].push(subscription);
+        return subscription;
+    },
+
+    "notifySubscribers": function (valueToNotify, event) {
+        event = event || defaultEvent;
+        if (this._subscriptions[event]) {
+            ko.dependencyDetection.ignore(function() {
+                ko.utils.arrayForEach(this._subscriptions[event].slice(0), function (subscription) {
+                    // In case a subscription was disposed during the arrayForEach cycle, check
+                    // for isDisposed on each subscription before invoking its callback
+                    if (subscription && (subscription.isDisposed !== true))
+                        subscription.callback(valueToNotify);
+                });
+            }, this);
+        }
+    },
+
+    getSubscriptionsCount: function () {
+        var total = 0;
+        for (var eventName in this._subscriptions) {
+            if (this._subscriptions.hasOwnProperty(eventName))
+                total += this._subscriptions[eventName].length;
+        }
+        return total;
+    },
+
+    extend: applyExtenders
+};
+
+
+ko.isSubscribable = function (instance) {
+    return typeof instance.subscribe == "function" && typeof instance["notifySubscribers"] == "function";
+};
+
+ko.exportSymbol('subscribable', ko.subscribable);
+ko.exportSymbol('isSubscribable', ko.isSubscribable);
+
+ko.dependencyDetection = (function () {
+    var _frames = [];
+
+    return {
+        begin: function (callback) {
+            _frames.push({ callback: callback, distinctDependencies:[] });
+        },
+
+        end: function () {
+            _frames.pop();
+        },
+
+        registerDependency: function (subscribable) {
+            if (!ko.isSubscribable(subscribable))
+                throw new Error("Only subscribable things can act as dependencies");
+            if (_frames.length > 0) {
+                var topFrame = _frames[_frames.length - 1];
+                if (!topFrame || ko.utils.arrayIndexOf(topFrame.distinctDependencies, subscribable) >= 0)
+                    return;
+                topFrame.distinctDependencies.push(subscribable);
+                topFrame.callback(subscribable);
+            }
+        },
+
+        ignore: function(callback, callbackTarget, callbackArgs) {
+            try {
+                _frames.push(null);
+                return callback.apply(callbackTarget, callbackArgs || []);
+            } finally {
+                _frames.pop();
+            }
+        }
+    };
+})();
+var primitiveTypes = { 'undefined':true, 'boolean':true, 'number':true, 'string':true };
+
+ko.observable = function (initialValue) {
+    var _latestValue = initialValue;
+
+    function observable() {
+        if (arguments.length > 0) {
+            // Write
+
+            // Ignore writes if the value hasn't changed
+            if ((!observable['equalityComparer']) || !observable['equalityComparer'](_latestValue, arguments[0])) {
+                observable.valueWillMutate();
+                _latestValue = arguments[0];
+                if (DEBUG) observable._latestValue = _latestValue;
+                observable.valueHasMutated();
+            }
+            return this; // Permits chained assignments
+        }
+        else {
+            // Read
+            ko.dependencyDetection.registerDependency(observable); // The caller only needs to be notified of changes if they did a "read" operation
+            return _latestValue;
+        }
+    }
+    if (DEBUG) observable._latestValue = _latestValue;
+    ko.subscribable.call(observable);
+    observable.peek = function() { return _latestValue };
+    observable.valueHasMutated = function () { observable["notifySubscribers"](_latestValue); }
+    observable.valueWillMutate = function () { observable["notifySubscribers"](_latestValue, "beforeChange"); }
+    ko.utils.extend(observable, ko.observable['fn']);
+
+    ko.exportProperty(observable, 'peek', observable.peek);
+    ko.exportProperty(observable, "valueHasMutated", observable.valueHasMutated);
+    ko.exportProperty(observable, "valueWillMutate", observable.valueWillMutate);
+
+    return observable;
+}
+
+ko.observable['fn'] = {
+    "equalityComparer": function valuesArePrimitiveAndEqual(a, b) {
+        var oldValueIsPrimitive = (a === null) || (typeof(a) in primitiveTypes);
+        return oldValueIsPrimitive ? (a === b) : false;
+    }
+};
+
+var protoProperty = ko.observable.protoProperty = "__ko_proto__";
+ko.observable['fn'][protoProperty] = ko.observable;
+
+ko.hasPrototype = function(instance, prototype) {
+    if ((instance === null) || (instance === undefined) || (instance[protoProperty] === undefined)) return false;
+    if (instance[protoProperty] === prototype) return true;
+    return ko.hasPrototype(instance[protoProperty], prototype); // Walk the prototype chain
+};
+
+ko.isObservable = function (instance) {
+    return ko.hasPrototype(instance, ko.observable);
+}
+ko.isWriteableObservable = function (instance) {
+    // Observable
+    if ((typeof instance == "function") && instance[protoProperty] === ko.observable)
+        return true;
+    // Writeable dependent observable
+    if ((typeof instance == "function") && (instance[protoProperty] === ko.dependentObservable) && (instance.hasWriteFunction))
+        return true;
+    // Anything else
+    return false;
+}
+
+
+ko.exportSymbol('observable', ko.observable);
+ko.exportSymbol('isObservable', ko.isObservable);
+ko.exportSymbol('isWriteableObservable', ko.isWriteableObservable);
+ko.observableArray = function (initialValues) {
+    if (arguments.length == 0) {
+        // Zero-parameter constructor initializes to empty array
+        initialValues = [];
+    }
+    if ((initialValues !== null) && (initialValues !== undefined) && !('length' in initialValues))
+        throw new Error("The argument passed when initializing an observable array must be an array, or null, or undefined.");
+
+    var result = ko.observable(initialValues);
+    ko.utils.extend(result, ko.observableArray['fn']);
+    return result;
+}
+
+ko.observableArray['fn'] = {
+    'remove': function (valueOrPredicate) {
+        var underlyingArray = this.peek();
+        var removedValues = [];
+        var predicate = typeof valueOrPredicate == "function" ? valueOrPredicate : function (value) { return value === valueOrPredicate; };
+        for (var i = 0; i < underlyingArray.length; i++) {
+            var value = underlyingArray[i];
+            if (predicate(value)) {
+                if (removedValues.length === 0) {
+                    this.valueWillMutate();
+                }
+                removedValues.push(value);
+                underlyingArray.splice(i, 1);
+                i--;
+            }
+        }
+        if (removedValues.length) {
+            this.valueHasMutated();
+        }
+        return removedValues;
+    },
+
+    'removeAll': function (arrayOfValues) {
+        // If you passed zero args, we remove everything
+        if (arrayOfValues === undefined) {
+            var underlyingArray = this.peek();
+            var allValues = underlyingArray.slice(0);
+            this.valueWillMutate();
+            underlyingArray.splice(0, underlyingArray.length);
+            this.valueHasMutated();
+            return allValues;
+        }
+        // If you passed an arg, we interpret it as an array of entries to remove
+        if (!arrayOfValues)
+            return [];
+        return this['remove'](function (value) {
+            return ko.utils.arrayIndexOf(arrayOfValues, value) >= 0;
+        });
+    },
+
+    'destroy': function (valueOrPredicate) {
+        var underlyingArray = this.peek();
+        var predicate = typeof valueOrPredicate == "function" ? valueOrPredicate : function (value) { return value === valueOrPredicate; };
+        this.valueWillMutate();
+        for (var i = underlyingArray.length - 1; i >= 0; i--) {
+            var value = underlyingArray[i];
+            if (predicate(value))
+                underlyingArray[i]["_destroy"] = true;
+        }
+        this.valueHasMutated();
+    },
+
+    'destroyAll': function (arrayOfValues) {
+        // If you passed zero args, we destroy everything
+        if (arrayOfValues === undefined)
+            return this['destroy'](function() { return true });
+
+        // If you passed an arg, we interpret it as an array of entries to destroy
+        if (!arrayOfValues)
+            return [];
+        return this['destroy'](function (value) {
+            return ko.utils.arrayIndexOf(arrayOfValues, value) >= 0;
+        });
+    },
+
+    'indexOf': function (item) {
+        var underlyingArray = this();
+        return ko.utils.arrayIndexOf(underlyingArray, item);
+    },
+
+    'replace': function(oldItem, newItem) {
+        var index = this['indexOf'](oldItem);
+        if (index >= 0) {
+            this.valueWillMutate();
+            this.peek()[index] = newItem;
+            this.valueHasMutated();
+        }
+    }
+}
+
+// Populate ko.observableArray.fn with read/write functions from native arrays
+// Important: Do not add any additional functions here that may reasonably be used to *read* data from the array
+// because we'll eval them without causing subscriptions, so ko.computed output could end up getting stale
+ko.utils.arrayForEach(["pop", "push", "reverse", "shift", "sort", "splice", "unshift"], function (methodName) {
+    ko.observableArray['fn'][methodName] = function () {
+        // Use "peek" to avoid creating a subscription in any computed that we're executing in the context of
+        // (for consistency with mutating regular observables)
+        var underlyingArray = this.peek();
+        this.valueWillMutate();
+        var methodCallResult = underlyingArray[methodName].apply(underlyingArray, arguments);
+        this.valueHasMutated();
+        return methodCallResult;
+    };
+});
+
+// Populate ko.observableArray.fn with read-only functions from native arrays
+ko.utils.arrayForEach(["slice"], function (methodName) {
+    ko.observableArray['fn'][methodName] = function () {
+        var underlyingArray = this();
+        return underlyingArray[methodName].apply(underlyingArray, arguments);
+    };
+});
+
+ko.exportSymbol('observableArray', ko.observableArray);
+ko.dependentObservable = function (evaluatorFunctionOrOptions, evaluatorFunctionTarget, options) {
+    var _latestValue,
+        _hasBeenEvaluated = false,
+        _isBeingEvaluated = false,
+        readFunction = evaluatorFunctionOrOptions;
+
+    if (readFunction && typeof readFunction == "object") {
+        // Single-parameter syntax - everything is on this "options" param
+        options = readFunction;
+        readFunction = options["read"];
+    } else {
+        // Multi-parameter syntax - construct the options according to the params passed
+        options = options || {};
+        if (!readFunction)
+            readFunction = options["read"];
+    }
+    if (typeof readFunction != "function")
+        throw new Error("Pass a function that returns the value of the ko.computed");
+
+    function addSubscriptionToDependency(subscribable) {
+        _subscriptionsToDependencies.push(subscribable.subscribe(evaluatePossiblyAsync));
+    }
+
+    function disposeAllSubscriptionsToDependencies() {
+        ko.utils.arrayForEach(_subscriptionsToDependencies, function (subscription) {
+            subscription.dispose();
+        });
+        _subscriptionsToDependencies = [];
+    }
+
+    function evaluatePossiblyAsync() {
+        var throttleEvaluationTimeout = dependentObservable['throttleEvaluation'];
+        if (throttleEvaluationTimeout && throttleEvaluationTimeout >= 0) {
+            clearTimeout(evaluationTimeoutInstance);
+            evaluationTimeoutInstance = setTimeout(evaluateImmediate, throttleEvaluationTimeout);
+        } else
+            evaluateImmediate();
+    }
+
+    function evaluateImmediate() {
+        if (_isBeingEvaluated) {
+            // If the evaluation of a ko.computed causes side effects, it's possible that it will trigger its own re-evaluation.
+            // This is not desirable (it's hard for a developer to realise a chain of dependencies might cause this, and they almost
+            // certainly didn't intend infinite re-evaluations). So, for predictability, we simply prevent ko.computeds from causing
+            // their own re-evaluation. Further discussion at https://github.com/SteveSanderson/knockout/pull/387
+            return;
+        }
+
+        // Don't dispose on first evaluation, because the "disposeWhen" callback might
+        // e.g., dispose when the associated DOM element isn't in the doc, and it's not
+        // going to be in the doc until *after* the first evaluation
+        if (_hasBeenEvaluated && disposeWhen()) {
+            dispose();
+            return;
+        }
+
+        _isBeingEvaluated = true;
+        try {
+            // Initially, we assume that none of the subscriptions are still being used (i.e., all are candidates for disposal).
+            // Then, during evaluation, we cross off any that are in fact still being used.
+            var disposalCandidates = ko.utils.arrayMap(_subscriptionsToDependencies, function(item) {return item.target;});
+
+            ko.dependencyDetection.begin(function(subscribable) {
+                var inOld;
+                if ((inOld = ko.utils.arrayIndexOf(disposalCandidates, subscribable)) >= 0)
+                    disposalCandidates[inOld] = undefined; // Don't want to dispose this subscription, as it's still being used
+                else
+                    addSubscriptionToDependency(subscribable); // Brand new subscription - add it
+            });
+
+            var newValue = readFunction.call(evaluatorFunctionTarget);
+
+            // For each subscription no longer being used, remove it from the active subscriptions list and dispose it
+            for (var i = disposalCandidates.length - 1; i >= 0; i--) {
+                if (disposalCandidates[i])
+                    _subscriptionsToDependencies.splice(i, 1)[0].dispose();
+            }
+            _hasBeenEvaluated = true;
+
+            dependentObservable["notifySubscribers"](_latestValue, "beforeChange");
+            _latestValue = newValue;
+            if (DEBUG) dependentObservable._latestValue = _latestValue;
+        } finally {
+            ko.dependencyDetection.end();
+        }
+
+        dependentObservable["notifySubscribers"](_latestValue);
+        _isBeingEvaluated = false;
+        if (!_subscriptionsToDependencies.length)
+            dispose();
+    }
+
+    function dependentObservable() {
+        if (arguments.length > 0) {
+            if (typeof writeFunction === "function") {
+                // Writing a value
+                writeFunction.apply(evaluatorFunctionTarget, arguments);
+            } else {
+                throw new Error("Cannot write a value to a ko.computed unless you specify a 'write' option. If you wish to read the current value, don't pass any parameters.");
+            }
+            return this; // Permits chained assignments
+        } else {
+            // Reading the value
+            if (!_hasBeenEvaluated)
+                evaluateImmediate();
+            ko.dependencyDetection.registerDependency(dependentObservable);
+            return _latestValue;
+        }
+    }
+
+    function peek() {
+        if (!_hasBeenEvaluated)
+            evaluateImmediate();
+        return _latestValue;
+    }
+
+    function isActive() {
+        return !_hasBeenEvaluated || _subscriptionsToDependencies.length > 0;
+    }
+
+    // By here, "options" is always non-null
+    var writeFunction = options["write"],
+        disposeWhenNodeIsRemoved = options["disposeWhenNodeIsRemoved"] || options.disposeWhenNodeIsRemoved || null,
+        disposeWhen = options["disposeWhen"] || options.disposeWhen || function() { return false; },
+        dispose = disposeAllSubscriptionsToDependencies,
+        _subscriptionsToDependencies = [],
+        evaluationTimeoutInstance = null;
+
+    if (!evaluatorFunctionTarget)
+        evaluatorFunctionTarget = options["owner"];
+
+    dependentObservable.peek = peek;
+    dependentObservable.getDependenciesCount = function () { return _subscriptionsToDependencies.length; };
+    dependentObservable.hasWriteFunction = typeof options["write"] === "function";
+    dependentObservable.dispose = function () { dispose(); };
+    dependentObservable.isActive = isActive;
+    dependentObservable.valueHasMutated = function() {
+        _hasBeenEvaluated = false;
+        evaluateImmediate();
+    };
+
+    ko.subscribable.call(dependentObservable);
+    ko.utils.extend(dependentObservable, ko.dependentObservable['fn']);
+
+    ko.exportProperty(dependentObservable, 'peek', dependentObservable.peek);
+    ko.exportProperty(dependentObservable, 'dispose', dependentObservable.dispose);
+    ko.exportProperty(dependentObservable, 'isActive', dependentObservable.isActive);
+    ko.exportProperty(dependentObservable, 'getDependenciesCount', dependentObservable.getDependenciesCount);
+
+    // Evaluate, unless deferEvaluation is true
+    if (options['deferEvaluation'] !== true)
+        evaluateImmediate();
+
+    // Build "disposeWhenNodeIsRemoved" and "disposeWhenNodeIsRemovedCallback" option values.
+    // But skip if isActive is false (there will never be any dependencies to dispose).
+    // (Note: "disposeWhenNodeIsRemoved" option both proactively disposes as soon as the node is removed using ko.removeNode(),
+    // plus adds a "disposeWhen" callback that, on each evaluation, disposes if the node was removed by some other means.)
+    if (disposeWhenNodeIsRemoved && isActive()) {
+        dispose = function() {
+            ko.utils.domNodeDisposal.removeDisposeCallback(disposeWhenNodeIsRemoved, arguments.callee);
+            disposeAllSubscriptionsToDependencies();
+        };
+        ko.utils.domNodeDisposal.addDisposeCallback(disposeWhenNodeIsRemoved, dispose);
+        var existingDisposeWhenFunction = disposeWhen;
+        disposeWhen = function () {
+            return !ko.utils.domNodeIsAttachedToDocument(disposeWhenNodeIsRemoved) || existingDisposeWhenFunction();
+        }
+    }
+
+    return dependentObservable;
+};
+
+ko.isComputed = function(instance) {
+    return ko.hasPrototype(instance, ko.dependentObservable);
+};
+
+var protoProp = ko.observable.protoProperty; // == "__ko_proto__"
+ko.dependentObservable[protoProp] = ko.observable;
+
+ko.dependentObservable['fn'] = {};
+ko.dependentObservable['fn'][protoProp] = ko.dependentObservable;
+
+ko.exportSymbol('dependentObservable', ko.dependentObservable);
+ko.exportSymbol('computed', ko.dependentObservable); // Make "ko.computed" an alias for "ko.dependentObservable"
+ko.exportSymbol('isComputed', ko.isComputed);
+
+(function() {
+    var maxNestedObservableDepth = 10; // Escape the (unlikely) pathalogical case where an observable's current value is itself (or similar reference cycle)
+
+    ko.toJS = function(rootObject) {
+        if (arguments.length == 0)
+            throw new Error("When calling ko.toJS, pass the object you want to convert.");
+
+        // We just unwrap everything at every level in the object graph
+        return mapJsObjectGraph(rootObject, function(valueToMap) {
+            // Loop because an observable's value might in turn be another observable wrapper
+            for (var i = 0; ko.isObservable(valueToMap) && (i < maxNestedObservableDepth); i++)
+                valueToMap = valueToMap();
+            return valueToMap;
+        });
+    };
+
+    ko.toJSON = function(rootObject, replacer, space) {     // replacer and space are optional
+        var plainJavaScriptObject = ko.toJS(rootObject);
+        return ko.utils.stringifyJson(plainJavaScriptObject, replacer, space);
+    };
+
+    function mapJsObjectGraph(rootObject, mapInputCallback, visitedObjects) {
+        visitedObjects = visitedObjects || new objectLookup();
+
+        rootObject = mapInputCallback(rootObject);
+        var canHaveProperties = (typeof rootObject == "object") && (rootObject !== null) && (rootObject !== undefined) && (!(rootObject instanceof Date));
+        if (!canHaveProperties)
+            return rootObject;
+
+        var outputProperties = rootObject instanceof Array ? [] : {};
+        visitedObjects.save(rootObject, outputProperties);
+
+        visitPropertiesOrArrayEntries(rootObject, function(indexer) {
+            var propertyValue = mapInputCallback(rootObject[indexer]);
+
+            switch (typeof propertyValue) {
+                case "boolean":
+                case "number":
+                case "string":
+                case "function":
+                    outputProperties[indexer] = propertyValue;
+                    break;
+                case "object":
+                case "undefined":
+                    var previouslyMappedValue = visitedObjects.get(propertyValue);
+                    outputProperties[indexer] = (previouslyMappedValue !== undefined)
+                        ? previouslyMappedValue
+                        : mapJsObjectGraph(propertyValue, mapInputCallback, visitedObjects);
+                    break;
+            }
+        });
+
+        return outputProperties;
+    }
+
+    function visitPropertiesOrArrayEntries(rootObject, visitorCallback) {
+        if (rootObject instanceof Array) {
+            for (var i = 0; i < rootObject.length; i++)
+                visitorCallback(i);
+
+            // For arrays, also respect toJSON property for custom mappings (fixes #278)
+            if (typeof rootObject['toJSON'] == 'function')
+                visitorCallback('toJSON');
+        } else {
+            for (var propertyName in rootObject)
+                visitorCallback(propertyName);
+        }
+    };
+
+    function objectLookup() {
+        var keys = [];
+        var values = [];
+        this.save = function(key, value) {
+            var existingIndex = ko.utils.arrayIndexOf(keys, key);
+            if (existingIndex >= 0)
+                values[existingIndex] = value;
+            else {
+                keys.push(key);
+                values.push(value);
+            }
+        };
+        this.get = function(key) {
+            var existingIndex = ko.utils.arrayIndexOf(keys, key);
+            return (existingIndex >= 0) ? values[existingIndex] : undefined;
+        };
+    };
+})();
+
+ko.exportSymbol('toJS', ko.toJS);
+ko.exportSymbol('toJSON', ko.toJSON);
+(function () {
+    var hasDomDataExpandoProperty = '__ko__hasDomDataOptionValue__';
+
+    // Normally, SELECT elements and their OPTIONs can only take value of type 'string' (because the values
+    // are stored on DOM attributes). ko.selectExtensions provides a way for SELECTs/OPTIONs to have values
+    // that are arbitrary objects. This is very convenient when implementing things like cascading dropdowns.
+    ko.selectExtensions = {
+        readValue : function(element) {
+            switch (ko.utils.tagNameLower(element)) {
+                case 'option':
+                    if (element[hasDomDataExpandoProperty] === true)
+                        return ko.utils.domData.get(element, ko.bindingHandlers.options.optionValueDomDataKey);
+                    return ko.utils.ieVersion <= 7
+                        ? (element.getAttributeNode('value').specified ? element.value : element.text)
+                        : element.value;
+                case 'select':
+                    return element.selectedIndex >= 0 ? ko.selectExtensions.readValue(element.options[element.selectedIndex]) : undefined;
+                default:
+                    return element.value;
+            }
+        },
+
+        writeValue: function(element, value) {
+            switch (ko.utils.tagNameLower(element)) {
+                case 'option':
+                    switch(typeof value) {
+                        case "string":
+                            ko.utils.domData.set(element, ko.bindingHandlers.options.optionValueDomDataKey, undefined);
+                            if (hasDomDataExpandoProperty in element) { // IE <= 8 throws errors if you delete non-existent properties from a DOM node
+                                delete element[hasDomDataExpandoProperty];
+                            }
+                            element.value = value;
+                            break;
+                        default:
+                            // Store arbitrary object using DomData
+                            ko.utils.domData.set(element, ko.bindingHandlers.options.optionValueDomDataKey, value);
+                            element[hasDomDataExpandoProperty] = true;
+
+                            // Special treatment of numbers is just for backward compatibility. KO 1.2.1 wrote numerical values to element.value.
+                            element.value = typeof value === "number" ? value : "";
+                            break;
+                    }
+                    break;
+                case 'select':
+                    for (var i = element.options.length - 1; i >= 0; i--) {
+                        if (ko.selectExtensions.readValue(element.options[i]) == value) {
+                            element.selectedIndex = i;
+                            break;
+                        }
+                    }
+                    break;
+                default:
+                    if ((value === null) || (value === undefined))
+                        value = "";
+                    element.value = value;
+                    break;
+            }
+        }
+    };
+})();
+
+ko.exportSymbol('selectExtensions', ko.selectExtensions);
+ko.exportSymbol('selectExtensions.readValue', ko.selectExtensions.readValue);
+ko.exportSymbol('selectExtensions.writeValue', ko.selectExtensions.writeValue);
+ko.expressionRewriting = (function () {
+    var restoreCapturedTokensRegex = /\@ko_token_(\d+)\@/g;
+    var javaScriptReservedWords = ["true", "false"];
+
+    // Matches something that can be assigned to--either an isolated identifier or something ending with a property accessor
+    // This is designed to be simple and avoid false negatives, but could produce false positives (e.g., a+b.c).
+    var javaScriptAssignmentTarget = /^(?:[$_a-z][$\w]*|(.+)(\.\s*[$_a-z][$\w]*|\[.+\]))$/i;
+
+    function restoreTokens(string, tokens) {
+        var prevValue = null;
+        while (string != prevValue) { // Keep restoring tokens until it no longer makes a difference (they may be nested)
+            prevValue = string;
+            string = string.replace(restoreCapturedTokensRegex, function (match, tokenIndex) {
+                return tokens[tokenIndex];
+            });
+        }
+        return string;
+    }
+
+    function getWriteableValue(expression) {
+        if (ko.utils.arrayIndexOf(javaScriptReservedWords, ko.utils.stringTrim(expression).toLowerCase()) >= 0)
+            return false;
+        var match = expression.match(javaScriptAssignmentTarget);
+        return match === null ? false : match[1] ? ('Object(' + match[1] + ')' + match[2]) : expression;
+    }
+
+    function ensureQuoted(key) {
+        var trimmedKey = ko.utils.stringTrim(key);
+        switch (trimmedKey.length && trimmedKey.charAt(0)) {
+            case "'":
+            case '"':
+                return key;
+            default:
+                return "'" + trimmedKey + "'";
+        }
+    }
+
+    return {
+        bindingRewriteValidators: [],
+
+        parseObjectLiteral: function(objectLiteralString) {
+            // A full tokeniser+lexer would add too much weight to this library, so here's a simple parser
+            // that is sufficient just to split an object literal string into a set of top-level key-value pairs
+
+            var str = ko.utils.stringTrim(objectLiteralString);
+            if (str.length < 3)
+                return [];
+            if (str.charAt(0) === "{")// Ignore any braces surrounding the whole object literal
+                str = str.substring(1, str.length - 1);
+
+            // Pull out any string literals and regex literals
+            var tokens = [];
+            var tokenStart = null, tokenEndChar;
+            for (var position = 0; position < str.length; position++) {
+                var c = str.charAt(position);
+                if (tokenStart === null) {
+                    switch (c) {
+                        case '"':
+                        case "'":
+                        case "/":
+                            tokenStart = position;
+                            tokenEndChar = c;
+                            break;
+                    }
+                } else if ((c == tokenEndChar) && (str.charAt(position - 1) !== "\\")) {
+                    var token = str.substring(tokenStart, position + 1);
+                    tokens.push(token);
+                    var replacement = "@ko_token_" + (tokens.length - 1) + "@";
+                    str = str.substring(0, tokenStart) + replacement + str.substring(position + 1);
+                    position -= (token.length - replacement.length);
+                    tokenStart = null;
+                }
+            }
+
+            // Next pull out balanced paren, brace, and bracket blocks
+            tokenStart = null;
+            tokenEndChar = null;
+            var tokenDepth = 0, tokenStartChar = null;
+            for (var position = 0; position < str.length; position++) {
+                var c = str.charAt(position);
+                if (tokenStart === null) {
+                    switch (c) {
+                        case "{": tokenStart = position; tokenStartChar = c;
+                                  tokenEndChar = "}";
+                                  break;
+                        case "(": tokenStart = position; tokenStartChar = c;
+                                  tokenEndChar = ")";
+                                  break;
+                        case "[": tokenStart = position; tokenStartChar = c;
+                                  tokenEndChar = "]";
+                                  break;
+                    }
+                }
+
+                if (c === tokenStartChar)
+                    tokenDepth++;
+                else if (c === tokenEndChar) {
+                    tokenDepth--;
+                    if (tokenDepth === 0) {
+                        var token = str.substring(tokenStart, position + 1);
+                        tokens.push(token);
+                        var replacement = "@ko_token_" + (tokens.length - 1) + "@";
+                        str = str.substring(0, tokenStart) + replacement + str.substring(position + 1);
+                        position -= (token.length - replacement.length);
+                        tokenStart = null;
+                    }
+                }
+            }
+
+            // Now we can safely split on commas to get the key/value pairs
+            var result = [];
+            var keyValuePairs = str.split(",");
+            for (var i = 0, j = keyValuePairs.length; i < j; i++) {
+                var pair = keyValuePairs[i];
+                var colonPos = pair.indexOf(":");
+                if ((colonPos > 0) && (colonPos < pair.length - 1)) {
+                    var key = pair.substring(0, colonPos);
+                    var value = pair.substring(colonPos + 1);
+                    result.push({ 'key': restoreTokens(key, tokens), 'value': restoreTokens(value, tokens) });
+                } else {
+                    result.push({ 'unknown': restoreTokens(pair, tokens) });
+                }
+            }
+            return result;
+        },
+
+        preProcessBindings: function (objectLiteralStringOrKeyValueArray) {
+            var keyValueArray = typeof objectLiteralStringOrKeyValueArray === "string"
+                ? ko.expressionRewriting.parseObjectLiteral(objectLiteralStringOrKeyValueArray)
+                : objectLiteralStringOrKeyValueArray;
+            var resultStrings = [], propertyAccessorResultStrings = [];
+
+            var keyValueEntry;
+            for (var i = 0; keyValueEntry = keyValueArray[i]; i++) {
+                if (resultStrings.length > 0)
+                    resultStrings.push(",");
+
+                if (keyValueEntry['key']) {
+                    var quotedKey = ensureQuoted(keyValueEntry['key']), val = keyValueEntry['value'];
+                    resultStrings.push(quotedKey);
+                    resultStrings.push(":");
+                    resultStrings.push(val);
+
+                    if (val = getWriteableValue(ko.utils.stringTrim(val))) {
+                        if (propertyAccessorResultStrings.length > 0)
+                            propertyAccessorResultStrings.push(", ");
+                        propertyAccessorResultStrings.push(quotedKey + " : function(__ko_value) { " + val + " = __ko_value; }");
+                    }
+                } else if (keyValueEntry['unknown']) {
+                    resultStrings.push(keyValueEntry['unknown']);
+                }
+            }
+
+            var combinedResult = resultStrings.join("");
+            if (propertyAccessorResultStrings.length > 0) {
+                var allPropertyAccessors = propertyAccessorResultStrings.join("");
+                combinedResult = combinedResult + ", '_ko_property_writers' : { " + allPropertyAccessors + " } ";
+            }
+
+            return combinedResult;
+        },
+
+        keyValueArrayContainsKey: function(keyValueArray, key) {
+            for (var i = 0; i < keyValueArray.length; i++)
+                if (ko.utils.stringTrim(keyValueArray[i]['key']) == key)
+                    return true;
+            return false;
+        },
+
+        // Internal, private KO utility for updating model properties from within bindings
+        // property:            If the property being updated is (or might be) an observable, pass it here
+        //                      If it turns out to be a writable observable, it will be written to directly
+        // allBindingsAccessor: All bindings in the current execution context.
+        //                      This will be searched for a '_ko_property_writers' property in case you're writing to a non-observable
+        // key:                 The key identifying the property to be written. Example: for { hasFocus: myValue }, write to 'myValue' by specifying the key 'hasFocus'
+        // value:               The value to be written
+        // checkIfDifferent:    If true, and if the property being written is a writable observable, the value will only be written if
+        //                      it is !== existing value on that writable observable
+        writeValueToProperty: function(property, allBindingsAccessor, key, value, checkIfDifferent) {
+            if (!property || !ko.isWriteableObservable(property)) {
+                var propWriters = allBindingsAccessor()['_ko_property_writers'];
+                if (propWriters && propWriters[key])
+                    propWriters[key](value);
+            } else if (!checkIfDifferent || property.peek() !== value) {
+                property(value);
+            }
+        }
+    };
+})();
+
+ko.exportSymbol('expressionRewriting', ko.expressionRewriting);
+ko.exportSymbol('expressionRewriting.bindingRewriteValidators', ko.expressionRewriting.bindingRewriteValidators);
+ko.exportSymbol('expressionRewriting.parseObjectLiteral', ko.expressionRewriting.parseObjectLiteral);
+ko.exportSymbol('expressionRewriting.preProcessBindings', ko.expressionRewriting.preProcessBindings);
+
+// For backward compatibility, define the following aliases. (Previously, these function names were misleading because
+// they referred to JSON specifically, even though they actually work with arbitrary JavaScript object literal expressions.)
+ko.exportSymbol('jsonExpressionRewriting', ko.expressionRewriting);
+ko.exportSymbol('jsonExpressionRewriting.insertPropertyAccessorsIntoJson', ko.expressionRewriting.preProcessBindings);(function() {
+    // "Virtual elements" is an abstraction on top of the usual DOM API which understands the notion that comment nodes
+    // may be used to represent hierarchy (in addition to the DOM's natural hierarchy).
+    // If you call the DOM-manipulating functions on ko.virtualElements, you will be able to read and write the state
+    // of that virtual hierarchy
+    //
+    // The point of all this is to support containerless templates (e.g., <!-- ko foreach:someCollection -->blah<!-- /ko -->)
+    // without having to scatter special cases all over the binding and templating code.
+
+    // IE 9 cannot reliably read the "nodeValue" property of a comment node (see https://github.com/SteveSanderson/knockout/issues/186)
+    // but it does give them a nonstandard alternative property called "text" that it can read reliably. Other browsers don't have that property.
+    // So, use node.text where available, and node.nodeValue elsewhere
+    var commentNodesHaveTextProperty = document.createComment("test").text === "<!--test-->";
+
+    var startCommentRegex = commentNodesHaveTextProperty ? /^<!--\s*ko(?:\s+(.+\s*\:[\s\S]*))?\s*-->$/ : /^\s*ko(?:\s+(.+\s*\:[\s\S]*))?\s*$/;
+    var endCommentRegex =   commentNodesHaveTextProperty ? /^<!--\s*\/ko\s*-->$/ : /^\s*\/ko\s*$/;
+    var htmlTagsWithOptionallyClosingChildren = { 'ul': true, 'ol': true };
+
+    function isStartComment(node) {
+        return (node.nodeType == 8) && (commentNodesHaveTextProperty ? node.text : node.nodeValue).match(startCommentRegex);
+    }
+
+    function isEndComment(node) {
+        return (node.nodeType == 8) && (commentNodesHaveTextProperty ? node.text : node.nodeValue).match(endCommentRegex);
+    }
+
+    function getVirtualChildren(startComment, allowUnbalanced) {
+        var currentNode = startComment;
+        var depth = 1;
+        var children = [];
+        while (currentNode = currentNode.nextSibling) {
+            if (isEndComment(currentNode)) {
+                depth--;
+                if (depth === 0)
+                    return children;
+            }
+
+            children.push(currentNode);
+
+            if (isStartComment(currentNode))
+                depth++;
+        }
+        if (!allowUnbalanced)
+            throw new Error("Cannot find closing comment tag to match: " + startComment.nodeValue);
+        return null;
+    }
+
+    function getMatchingEndComment(startComment, allowUnbalanced) {
+        var allVirtualChildren = getVirtualChildren(startComment, allowUnbalanced);
+        if (allVirtualChildren) {
+            if (allVirtualChildren.length > 0)
+                return allVirtualChildren[allVirtualChildren.length - 1].nextSibling;
+            return startComment.nextSibling;
+        } else
+            return null; // Must have no matching end comment, and allowUnbalanced is true
+    }
+
+    function getUnbalancedChildTags(node) {
+        // e.g., from <div>OK</div><!-- ko blah --><span>Another</span>, returns: <!-- ko blah --><span>Another</span>
+        //       from <div>OK</div><!-- /ko --><!-- /ko -->,             returns: <!-- /ko --><!-- /ko -->
+        var childNode = node.firstChild, captureRemaining = null;
+        if (childNode) {
+            do {
+                if (captureRemaining)                   // We already hit an unbalanced node and are now just scooping up all subsequent nodes
+                    captureRemaining.push(childNode);
+                else if (isStartComment(childNode)) {
+                    var matchingEndComment = getMatchingEndComment(childNode, /* allowUnbalanced: */ true);
+                    if (matchingEndComment)             // It's a balanced tag, so skip immediately to the end of this virtual set
+                        childNode = matchingEndComment;
+                    else
+                        captureRemaining = [childNode]; // It's unbalanced, so start capturing from this point
+                } else if (isEndComment(childNode)) {
+                    captureRemaining = [childNode];     // It's unbalanced (if it wasn't, we'd have skipped over it already), so start capturing
+                }
+            } while (childNode = childNode.nextSibling);
+        }
+        return captureRemaining;
+    }
+
+    ko.virtualElements = {
+        allowedBindings: {},
+
+        childNodes: function(node) {
+            return isStartComment(node) ? getVirtualChildren(node) : node.childNodes;
+        },
+
+        emptyNode: function(node) {
+            if (!isStartComment(node))
+                ko.utils.emptyDomNode(node);
+            else {
+                var virtualChildren = ko.virtualElements.childNodes(node);
+                for (var i = 0, j = virtualChildren.length; i < j; i++)
+                    ko.removeNode(virtualChildren[i]);
+            }
+        },
+
+        setDomNodeChildren: function(node, childNodes) {
+            if (!isStartComment(node))
+                ko.utils.setDomNodeChildren(node, childNodes);
+            else {
+                ko.virtualElements.emptyNode(node);
+                var endCommentNode = node.nextSibling; // Must be the next sibling, as we just emptied the children
+                for (var i = 0, j = childNodes.length; i < j; i++)
+                    endCommentNode.parentNode.insertBefore(childNodes[i], endCommentNode);
+            }
+        },
+
+        prepend: function(containerNode, nodeToPrepend) {
+            if (!isStartComment(containerNode)) {
+                if (containerNode.firstChild)
+                    containerNode.insertBefore(nodeToPrepend, containerNode.firstChild);
+                else
+                    containerNode.appendChild(nodeToPrepend);
+            } else {
+                // Start comments must always have a parent and at least one following sibling (the end comment)
+                containerNode.parentNode.insertBefore(nodeToPrepend, containerNode.nextSibling);
+            }
+        },
+
+        insertAfter: function(containerNode, nodeToInsert, insertAfterNode) {
+            if (!insertAfterNode) {
+                ko.virtualElements.prepend(containerNode, nodeToInsert);
+            } else if (!isStartComment(containerNode)) {
+                // Insert after insertion point
+                if (insertAfterNode.nextSibling)
+                    containerNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling);
+                else
+                    containerNode.appendChild(nodeToInsert);
+            } else {
+                // Children of start comments must always have a parent and at least one following sibling (the end comment)
+                containerNode.parentNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling);
+            }
+        },
+
+        firstChild: function(node) {
+            if (!isStartComment(node))
+                return node.firstChild;
+            if (!node.nextSibling || isEndComment(node.nextSibling))
+                return null;
+            return node.nextSibling;
+        },
+
+        nextSibling: function(node) {
+            if (isStartComment(node))
+                node = getMatchingEndComment(node);
+            if (node.nextSibling && isEndComment(node.nextSibling))
+                return null;
+            return node.nextSibling;
+        },
+
+        virtualNodeBindingValue: function(node) {
+            var regexMatch = isStartComment(node);
+            return regexMatch ? regexMatch[1] : null;
+        },
+
+        normaliseVirtualElementDomStructure: function(elementVerified) {
+            // Workaround for https://github.com/SteveSanderson/knockout/issues/155
+            // (IE <= 8 or IE 9 quirks mode parses your HTML weirdly, treating closing </li> tags as if they don't exist, thereby moving comment nodes
+            // that are direct descendants of <ul> into the preceding <li>)
+            if (!htmlTagsWithOptionallyClosingChildren[ko.utils.tagNameLower(elementVerified)])
+                return;
+
+            // Scan immediate children to see if they contain unbalanced comment tags. If they do, those comment tags
+            // must be intended to appear *after* that child, so move them there.
+            var childNode = elementVerified.firstChild;
+            if (childNode) {
+                do {
+                    if (childNode.nodeType === 1) {
+                        var unbalancedTags = getUnbalancedChildTags(childNode);
+                        if (unbalancedTags) {
+                            // Fix up the DOM by moving the unbalanced tags to where they most likely were intended to be placed - *after* the child
+                            var nodeToInsertBefore = childNode.nextSibling;
+                            for (var i = 0; i < unbalancedTags.length; i++) {
+                                if (nodeToInsertBefore)
+                                    elementVerified.insertBefore(unbalancedTags[i], nodeToInsertBefore);
+                                else
+                                    elementVerified.appendChild(unbalancedTags[i]);
+                            }
+                        }
+                    }
+                } while (childNode = childNode.nextSibling);
+            }
+        }
+    };
+})();
+ko.exportSymbol('virtualElements', ko.virtualElements);
+ko.exportSymbol('virtualElements.allowedBindings', ko.virtualElements.allowedBindings);
+ko.exportSymbol('virtualElements.emptyNode', ko.virtualElements.emptyNode);
+//ko.exportSymbol('virtualElements.firstChild', ko.virtualElements.firstChild);     // firstChild is not minified
+ko.exportSymbol('virtualElements.insertAfter', ko.virtualElements.insertAfter);
+//ko.exportSymbol('virtualElements.nextSibling', ko.virtualElements.nextSibling);   // nextSibling is not minified
+ko.exportSymbol('virtualElements.prepend', ko.virtualElements.prepend);
+ko.exportSymbol('virtualElements.setDomNodeChildren', ko.virtualElements.setDomNodeChildren);
+(function() {
+    var defaultBindingAttributeName = "data-bind";
+
+    ko.bindingProvider = function() {
+        this.bindingCache = {};
+    };
+
+    ko.utils.extend(ko.bindingProvider.prototype, {
+        'nodeHasBindings': function(node) {
+            switch (node.nodeType) {
+                case 1: return node.getAttribute(defaultBindingAttributeName) != null;   // Element
+                case 8: return ko.virtualElements.virtualNodeBindingValue(node) != null; // Comment node
+                default: return false;
+            }
+        },
+
+        'getBindings': function(node, bindingContext) {
+            var bindingsString = this['getBindingsString'](node, bindingContext);
+            return bindingsString ? this['parseBindingsString'](bindingsString, bindingContext, node) : null;
+        },
+
+        // The following function is only used internally by this default provider.
+        // It's not part of the interface definition for a general binding provider.
+        'getBindingsString': function(node, bindingContext) {
+            switch (node.nodeType) {
+                case 1: return node.getAttribute(defaultBindingAttributeName);   // Element
+                case 8: return ko.virtualElements.virtualNodeBindingValue(node); // Comment node
+                default: return null;
+            }
+        },
+
+        // The following function is only used internally by this default provider.
+        // It's not part of the interface definition for a general binding provider.
+        'parseBindingsString': function(bindingsString, bindingContext, node) {
+            try {
+                var bindingFunction = createBindingsStringEvaluatorViaCache(bindingsString, this.bindingCache);
+                return bindingFunction(bindingContext, node);
+            } catch (ex) {
+                throw new Error("Unable to parse bindings.\nMessage: " + ex + ";\nBindings value: " + bindingsString);
+            }
+        }
+    });
+
+    ko.bindingProvider['instance'] = new ko.bindingProvider();
+
+    function createBindingsStringEvaluatorViaCache(bindingsString, cache) {
+        var cacheKey = bindingsString;
+        return cache[cacheKey]
+            || (cache[cacheKey] = createBindingsStringEvaluator(bindingsString));
+    }
+
+    function createBindingsStringEvaluator(bindingsString) {
+        // Build the source for a function that evaluates "expression"
+        // For each scope variable, add an extra level of "with" nesting
+        // Example result: with(sc1) { with(sc0) { return (expression) } }
+        var rewrittenBindings = ko.expressionRewriting.preProcessBindings(bindingsString),
+            functionBody = "with($context){with($data||{}){return{" + rewrittenBindings + "}}}";
+        return new Function("$context", "$element", functionBody);
+    }
+})();
+
+ko.exportSymbol('bindingProvider', ko.bindingProvider);
+(function () {
+    ko.bindingHandlers = {};
+
+    ko.bindingContext = function(dataItem, parentBindingContext, dataItemAlias) {
+        if (parentBindingContext) {
+            ko.utils.extend(this, parentBindingContext); // Inherit $root and any custom properties
+            this['$parentContext'] = parentBindingContext;
+            this['$parent'] = parentBindingContext['$data'];
+            this['$parents'] = (parentBindingContext['$parents'] || []).slice(0);
+            this['$parents'].unshift(this['$parent']);
+        } else {
+            this['$parents'] = [];
+            this['$root'] = dataItem;
+            // Export 'ko' in the binding context so it will be available in bindings and templates
+            // even if 'ko' isn't exported as a global, such as when using an AMD loader.
+            // See https://github.com/SteveSanderson/knockout/issues/490
+            this['ko'] = ko;
+        }
+        this['$data'] = dataItem;
+        if (dataItemAlias)
+            this[dataItemAlias] = dataItem;
+    }
+    ko.bindingContext.prototype['createChildContext'] = function (dataItem, dataItemAlias) {
+        return new ko.bindingContext(dataItem, this, dataItemAlias);
+    };
+    ko.bindingContext.prototype['extend'] = function(properties) {
+        var clone = ko.utils.extend(new ko.bindingContext(), this);
+        return ko.utils.extend(clone, properties);
+    };
+
+    function validateThatBindingIsAllowedForVirtualElements(bindingName) {
+        var validator = ko.virtualElements.allowedBindings[bindingName];
+        if (!validator)
+            throw new Error("The binding '" + bindingName + "' cannot be used with virtual elements")
+    }
+
+    function applyBindingsToDescendantsInternal (viewModel, elementOrVirtualElement, bindingContextsMayDifferFromDomParentElement) {
+        var currentChild, nextInQueue = ko.virtualElements.firstChild(elementOrVirtualElement);
+        while (currentChild = nextInQueue) {
+            // Keep a record of the next child *before* applying bindings, in case the binding removes the current child from its position
+            nextInQueue = ko.virtualElements.nextSibling(currentChild);
+            applyBindingsToNodeAndDescendantsInternal(viewModel, currentChild, bindingContextsMayDifferFromDomParentElement);
+        }
+    }
+
+    function applyBindingsToNodeAndDescendantsInternal (viewModel, nodeVerified, bindingContextMayDifferFromDomParentElement) {
+        var shouldBindDescendants = true;
+
+        // Perf optimisation: Apply bindings only if...
+        // (1) We need to store the binding context on this node (because it may differ from the DOM parent node's binding context)
+        //     Note that we can't store binding contexts on non-elements (e.g., text nodes), as IE doesn't allow expando properties for those
+        // (2) It might have bindings (e.g., it has a data-bind attribute, or it's a marker for a containerless template)
+        var isElement = (nodeVerified.nodeType === 1);
+        if (isElement) // Workaround IE <= 8 HTML parsing weirdness
+            ko.virtualElements.normaliseVirtualElementDomStructure(nodeVerified);
+
+        var shouldApplyBindings = (isElement && bindingContextMayDifferFromDomParentElement)             // Case (1)
+                               || ko.bindingProvider['instance']['nodeHasBindings'](nodeVerified);       // Case (2)
+        if (shouldApplyBindings)
+            shouldBindDescendants = applyBindingsToNodeInternal(nodeVerified, null, viewModel, bindingContextMayDifferFromDomParentElement).shouldBindDescendants;
+
+        if (shouldBindDescendants) {
+            // We're recursing automatically into (real or virtual) child nodes without changing binding contexts. So,
+            //  * For children of a *real* element, the binding context is certainly the same as on their DOM .parentNode,
+            //    hence bindingContextsMayDifferFromDomParentElement is false
+            //  * For children of a *virtual* element, we can't be sure. Evaluating .parentNode on those children may
+            //    skip over any number of intermediate virtual elements, any of which might define a custom binding context,
+            //    hence bindingContextsMayDifferFromDomParentElement is true
+            applyBindingsToDescendantsInternal(viewModel, nodeVerified, /* bindingContextsMayDifferFromDomParentElement: */ !isElement);
+        }
+    }
+
+    function applyBindingsToNodeInternal (node, bindings, viewModelOrBindingContext, bindingContextMayDifferFromDomParentElement) {
+        // Need to be sure that inits are only run once, and updates never run until all the inits have been run
+        var initPhase = 0; // 0 = before all inits, 1 = during inits, 2 = after all inits
+
+        // Each time the dependentObservable is evaluated (after data changes),
+        // the binding attribute is reparsed so that it can pick out the correct
+        // model properties in the context of the changed data.
+        // DOM event callbacks need to be able to access this changed data,
+        // so we need a single parsedBindings variable (shared by all callbacks
+        // associated with this node's bindings) that all the closures can access.
+        var parsedBindings;
+        function makeValueAccessor(bindingKey) {
+            return function () { return parsedBindings[bindingKey] }
+        }
+        function parsedBindingsAccessor() {
+            return parsedBindings;
+        }
+
+        var bindingHandlerThatControlsDescendantBindings;
+        ko.dependentObservable(
+            function () {
+                // Ensure we have a nonnull binding context to work with
+                var bindingContextInstance = viewModelOrBindingContext && (viewModelOrBindingContext instanceof ko.bindingContext)
+                    ? viewModelOrBindingContext
+                    : new ko.bindingContext(ko.utils.unwrapObservable(viewModelOrBindingContext));
+                var viewModel = bindingContextInstance['$data'];
+
+                // Optimization: Don't store the binding context on this node if it's definitely the same as on node.parentNode, because
+                // we can easily recover it just by scanning up the node's ancestors in the DOM
+                // (note: here, parent node means "real DOM parent" not "virtual parent", as there's no O(1) way to find the virtual parent)
+                if (bindingContextMayDifferFromDomParentElement)
+                    ko.storedBindingContextForNode(node, bindingContextInstance);
+
+                // Use evaluatedBindings if given, otherwise fall back on asking the bindings provider to give us some bindings
+                var evaluatedBindings = (typeof bindings == "function") ? bindings(bindingContextInstance, node) : bindings;
+                parsedBindings = evaluatedBindings || ko.bindingProvider['instance']['getBindings'](node, bindingContextInstance);
+
+                if (parsedBindings) {
+                    // First run all the inits, so bindings can register for notification on changes
+                    if (initPhase === 0) {
+                        initPhase = 1;
+                        for (var bindingKey in parsedBindings) {
+                            var binding = ko.bindingHandlers[bindingKey];
+                            if (binding && node.nodeType === 8)
+                                validateThatBindingIsAllowedForVirtualElements(bindingKey);
+
+                            if (binding && typeof binding["init"] == "function") {
+                                var handlerInitFn = binding["init"];
+                                var initResult = handlerInitFn(node, makeValueAccessor(bindingKey), parsedBindingsAccessor, viewModel, bindingContextInstance);
+
+                                // If this binding handler claims to control descendant bindings, make a note of this
+                                if (initResult && initResult['controlsDescendantBindings']) {
+                                    if (bindingHandlerThatControlsDescendantBindings !== undefined)
+                                        throw new Error("Multiple bindings (" + bindingHandlerThatControlsDescendantBindings + " and " + bindingKey + ") are trying to control descendant bindings of the same element. You cannot use these bindings together on the same element.");
+                                    bindingHandlerThatControlsDescendantBindings = bindingKey;
+                                }
+                            }
+                        }
+                        initPhase = 2;
+                    }
+
+                    // ... then run all the updates, which might trigger changes even on the first evaluation
+                    if (initPhase === 2) {
+                        for (var bindingKey in parsedBindings) {
+                            var binding = ko.bindingHandlers[bindingKey];
+                            if (binding && typeof binding["update"] == "function") {
+                                var handlerUpdateFn = binding["update"];
+                                handlerUpdateFn(node, makeValueAccessor(bindingKey), parsedBindingsAccessor, viewModel, bindingContextInstance);
+                            }
+                        }
+                    }
+                }
+            },
+            null,
+            { disposeWhenNodeIsRemoved : node }
+        );
+
+        return {
+            shouldBindDescendants: bindingHandlerThatControlsDescendantBindings === undefined
+        };
+    };
+
+    var storedBindingContextDomDataKey = "__ko_bindingContext__";
+    ko.storedBindingContextForNode = function (node, bindingContext) {
+        if (arguments.length == 2)
+            ko.utils.domData.set(node, storedBindingContextDomDataKey, bindingContext);
+        else
+            return ko.utils.domData.get(node, storedBindingContextDomDataKey);
+    }
+
+    ko.applyBindingsToNode = function (node, bindings, viewModel) {
+        if (node.nodeType === 1) // If it's an element, workaround IE <= 8 HTML parsing weirdness
+            ko.virtualElements.normaliseVirtualElementDomStructure(node);
+        return applyBindingsToNodeInternal(node, bindings, viewModel, true);
+    };
+
+    ko.applyBindingsToDescendants = function(viewModel, rootNode) {
+        if (rootNode.nodeType === 1 || rootNode.nodeType === 8)
+            applyBindingsToDescendantsInternal(viewModel, rootNode, true);
+    };
+
+    ko.applyBindings = function (viewModel, rootNode) {
+        if (rootNode && (rootNode.nodeType !== 1) && (rootNode.nodeType !== 8))
+            throw new Error("ko.applyBindings: first parameter should be your view model; second parameter should be a DOM node");
+        rootNode = rootNode || window.document.body; // Make "rootNode" parameter optional
+
+        applyBindingsToNodeAndDescendantsInternal(viewModel, rootNode, true);
+    };
+
+    // Retrieving binding context from arbitrary nodes
+    ko.contextFor = function(node) {
+        // We can only do something meaningful for elements and comment nodes (in particular, not text nodes, as IE can't store domdata for them)
+        switch (node.nodeType) {
+            case 1:
+            case 8:
+                var context = ko.storedBindingContextForNode(node);
+                if (context) return context;
+                if (node.parentNode) return ko.contextFor(node.parentNode);
+                break;
+        }
+        return undefined;
+    };
+    ko.dataFor = function(node) {
+        var context = ko.contextFor(node);
+        return context ? context['$data'] : undefined;
+    };
+
+    ko.exportSymbol('bindingHandlers', ko.bindingHandlers);
+    ko.exportSymbol('applyBindings', ko.applyBindings);
+    ko.exportSymbol('applyBindingsToDescendants', ko.applyBindingsToDescendants);
+    ko.exportSymbol('applyBindingsToNode', ko.applyBindingsToNode);
+    ko.exportSymbol('contextFor', ko.contextFor);
+    ko.exportSymbol('dataFor', ko.dataFor);
+})();
+var attrHtmlToJavascriptMap = { 'class': 'className', 'for': 'htmlFor' };
+ko.bindingHandlers['attr'] = {
+    'update': function(element, valueAccessor, allBindingsAccessor) {
+        var value = ko.utils.unwrapObservable(valueAccessor()) || {};
+        for (var attrName in value) {
+            if (typeof attrName == "string") {
+                var attrValue = ko.utils.unwrapObservable(value[attrName]);
+
+                // To cover cases like "attr: { checked:someProp }", we want to remove the attribute entirely
+                // when someProp is a "no value"-like value (strictly null, false, or undefined)
+                // (because the absence of the "checked" attr is how to mark an element as not checked, etc.)
+                var toRemove = (attrValue === false) || (attrValue === null) || (attrValue === undefined);
+                if (toRemove)
+                    element.removeAttribute(attrName);
+
+                // In IE <= 7 and IE8 Quirks Mode, you have to use the Javascript property name instead of the
+                // HTML attribute name for certain attributes. IE8 Standards Mode supports the correct behavior,
+                // but instead of figuring out the mode, we'll just set the attribute through the Javascript
+                // property for IE <= 8.
+                if (ko.utils.ieVersion <= 8 && attrName in attrHtmlToJavascriptMap) {
+                    attrName = attrHtmlToJavascriptMap[attrName];
+                    if (toRemove)
+                        element.removeAttribute(attrName);
+                    else
+                        element[attrName] = attrValue;
+                } else if (!toRemove) {
+                    try {
+                        element.setAttribute(attrName, attrValue.toString());
+                    } catch (err) {
+                        // ignore for now
+                        if (console) {
+                            console.log("Can't set attribute " + attrName + " to " + attrValue + " error: " + err);
+                        }
+                    }
+                }
+
+                // Treat "name" specially - although you can think of it as an attribute, it also needs
+                // special handling on older versions of IE (https://github.com/SteveSanderson/knockout/pull/333)
+                // Deliberately being case-sensitive here because XHTML would regard "Name" as a different thing
+                // entirely, and there's no strong reason to allow for such casing in HTML.
+                if (attrName === "name") {
+                    ko.utils.setElementName(element, toRemove ? "" : attrValue.toString());
+                }
+            }
+        }
+    }
+};
+ko.bindingHandlers['checked'] = {
+    'init': function (element, valueAccessor, allBindingsAccessor) {
+        var updateHandler = function() {
+            var valueToWrite;
+            if (element.type == "checkbox") {
+                valueToWrite = element.checked;
+            } else if ((element.type == "radio") && (element.checked)) {
+                valueToWrite = element.value;
+            } else {
+                return; // "checked" binding only responds to checkboxes and selected radio buttons
+            }
+
+            var modelValue = valueAccessor(), unwrappedValue = ko.utils.unwrapObservable(modelValue);
+            if ((element.type == "checkbox") && (unwrappedValue instanceof Array)) {
+                // For checkboxes bound to an array, we add/remove the checkbox value to that array
+                // This works for both observable and non-observable arrays
+                var existingEntryIndex = ko.utils.arrayIndexOf(unwrappedValue, element.value);
+                if (element.checked && (existingEntryIndex < 0))
+                    modelValue.push(element.value);
+                else if ((!element.checked) && (existingEntryIndex >= 0))
+                    modelValue.splice(existingEntryIndex, 1);
+            } else {
+                ko.expressionRewriting.writeValueToProperty(modelValue, allBindingsAccessor, 'checked', valueToWrite, true);
+            }
+        };
+        ko.utils.registerEventHandler(element, "click", updateHandler);
+
+        // IE 6 won't allow radio buttons to be selected unless they have a name
+        if ((element.type == "radio") && !element.name)
+            ko.bindingHandlers['uniqueName']['init'](element, function() { return true });
+    },
+    'update': function (element, valueAccessor) {
+        var value = ko.utils.unwrapObservable(valueAccessor());
+
+        if (element.type == "checkbox") {
+            if (value instanceof Array) {
+                // When bound to an array, the checkbox being checked represents its value being present in that array
+                element.checked = ko.utils.arrayIndexOf(value, element.value) >= 0;
+            } else {
+                // When bound to anything other value (not an array), the checkbox being checked represents the value being trueish
+                element.checked = value;
+            }
+        } else if (element.type == "radio") {
+            element.checked = (element.value == value);
+        }
+    }
+};
+var classesWrittenByBindingKey = '__ko__cssValue';
+ko.bindingHandlers['css'] = {
+    'update': function (element, valueAccessor) {
+        var value = ko.utils.unwrapObservable(valueAccessor());
+        if (typeof value == "object") {
+            for (var className in value) {
+                var shouldHaveClass = ko.utils.unwrapObservable(value[className]);
+                ko.utils.toggleDomNodeCssClass(element, className, shouldHaveClass);
+            }
+        } else {
+            value = String(value || ''); // Make sure we don't try to store or set a non-string value
+            ko.utils.toggleDomNodeCssClass(element, element[classesWrittenByBindingKey], false);
+            element[classesWrittenByBindingKey] = value;
+            ko.utils.toggleDomNodeCssClass(element, value, true);
+        }
+    }
+};
+ko.bindingHandlers['enable'] = {
+    'update': function (element, valueAccessor) {
+        var value = ko.utils.unwrapObservable(valueAccessor());
+        if (value && element.disabled)
+            element.removeAttribute("disabled");
+        else if ((!value) && (!element.disabled))
+            element.disabled = true;
+    }
+};
+
+ko.bindingHandlers['disable'] = {
+    'update': function (element, valueAccessor) {
+        ko.bindingHandlers['enable']['update'](element, function() { return !ko.utils.unwrapObservable(valueAccessor()) });
+    }
+};
+// For certain common events (currently just 'click'), allow a simplified data-binding syntax
+// e.g. click:handler instead of the usual full-length event:{click:handler}
+function makeEventHandlerShortcut(eventName) {
+    ko.bindingHandlers[eventName] = {
+        'init': function(element, valueAccessor, allBindingsAccessor, viewModel) {
+            var newValueAccessor = function () {
+                var result = {};
+                result[eventName] = valueAccessor();
+                return result;
+            };
+            return ko.bindingHandlers['event']['init'].call(this, element, newValueAccessor, allBindingsAccessor, viewModel);
+        }
+    }
+}
+
+ko.bindingHandlers['event'] = {
+    'init' : function (element, valueAccessor, allBindingsAccessor, viewModel) {
+        var eventsToHandle = valueAccessor() || {};
+        for(var eventNameOutsideClosure in eventsToHandle) {
+            (function() {
+                var eventName = eventNameOutsideClosure; // Separate variable to be captured by event handler closure
+                if (typeof eventName == "string") {
+                    ko.utils.registerEventHandler(element, eventName, function (event) {
+                        var handlerReturnValue;
+                        var handlerFunction = valueAccessor()[eventName];
+                        if (!handlerFunction)
+                            return;
+                        var allBindings = allBindingsAccessor();
+
+                        try {
+                            // Take all the event args, and prefix with the viewmodel
+                            var argsForHandler = ko.utils.makeArray(arguments);
+                            argsForHandler.unshift(viewModel);
+                            handlerReturnValue = handlerFunction.apply(viewModel, argsForHandler);
+                        } finally {
+                            if (handlerReturnValue !== true) { // Normally we want to prevent default action. Developer can override this be explicitly returning true.
+                                if (event.preventDefault)
+                                    event.preventDefault();
+                                else
+                                    event.returnValue = false;
+                            }
+                        }
+
+                        var bubble = allBindings[eventName + 'Bubble'] !== false;
+                        if (!bubble) {
+                            event.cancelBubble = true;
+                            if (event.stopPropagation)
+                                event.stopPropagation();
+                        }
+                    });
+                }
+            })();
+        }
+    }
+};
+// "foreach: someExpression" is equivalent to "template: { foreach: someExpression }"
+// "foreach: { data: someExpression, afterAdd: myfn }" is equivalent to "template: { foreach: someExpression, afterAdd: myfn }"
+ko.bindingHandlers['foreach'] = {
+    makeTemplateValueAccessor: function(valueAccessor) {
+        return function() {
+            var modelValue = valueAccessor(),
+                unwrappedValue = ko.utils.peekObservable(modelValue);    // Unwrap without setting a dependency here
+
+            // If unwrappedValue is the array, pass in the wrapped value on its own
+            // The value will be unwrapped and tracked within the template binding
+            // (See https://github.com/SteveSanderson/knockout/issues/523)
+            if ((!unwrappedValue) || typeof unwrappedValue.length == "number")
+                return { 'foreach': modelValue, 'templateEngine': ko.nativeTemplateEngine.instance };
+
+            // If unwrappedValue.data is the array, preserve all relevant options and unwrap again value so we get updates
+            ko.utils.unwrapObservable(modelValue);
+            return {
+                'foreach': unwrappedValue['data'],
+                'as': unwrappedValue['as'],
+                'includeDestroyed': unwrappedValue['includeDestroyed'],
+                'afterAdd': unwrappedValue['afterAdd'],
+                'beforeRemove': unwrappedValue['beforeRemove'],
+                'afterRender': unwrappedValue['afterRender'],
+                'beforeMove': unwrappedValue['beforeMove'],
+                'afterMove': unwrappedValue['afterMove'],
+                'templateEngine': ko.nativeTemplateEngine.instance
+            };
+        };
+    },
+    'init': function(element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
+        return ko.bindingHandlers['template']['init'](element, ko.bindingHandlers['foreach'].makeTemplateValueAccessor(valueAccessor));
+    },
+    'update': function(element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
+        return ko.bindingHandlers['template']['update'](element, ko.bindingHandlers['foreach'].makeTemplateValueAccessor(valueAccessor), allBindingsAccessor, viewModel, bindingContext);
+    }
+};
+ko.expressionRewriting.bindingRewriteValidators['foreach'] = false; // Can't rewrite control flow bindings
+ko.virtualElements.allowedBindings['foreach'] = true;
+var hasfocusUpdatingProperty = '__ko_hasfocusUpdating';
+ko.bindingHandlers['hasfocus'] = {
+    'init': function(element, valueAccessor, allBindingsAccessor) {
+        var handleElementFocusChange = function(isFocused) {
+            // Where possible, ignore which event was raised and determine focus state using activeElement,
+            // as this avoids phantom focus/blur events raised when changing tabs in modern browsers.
+            // However, not all KO-targeted browsers (Firefox 2) support activeElement. For those browsers,
+            // prevent a loss of focus when changing tabs/windows by setting a flag that prevents hasfocus
+            // from calling 'blur()' on the element when it loses focus.
+            // Discussion at https://github.com/SteveSanderson/knockout/pull/352
+            element[hasfocusUpdatingProperty] = true;
+            var ownerDoc = element.ownerDocument;
+            if ("activeElement" in ownerDoc) {
+                isFocused = (ownerDoc.activeElement === element);
+            }
+            var modelValue = valueAccessor();
+            ko.expressionRewriting.writeValueToProperty(modelValue, allBindingsAccessor, 'hasfocus', isFocused, true);
+            element[hasfocusUpdatingProperty] = false;
+        };
+        var handleElementFocusIn = handleElementFocusChange.bind(null, true);
+        var handleElementFocusOut = handleElementFocusChange.bind(null, false);
+
+        ko.utils.registerEventHandler(element, "focus", handleElementFocusIn);
+        ko.utils.registerEventHandler(element, "focusin", handleElementFocusIn); // For IE
+        ko.utils.registerEventHandler(element, "blur",  handleElementFocusOut);
+        ko.utils.registerEventHandler(element, "focusout",  handleElementFocusOut); // For IE
+    },
+    'update': function(element, valueAccessor) {
+        var value = ko.utils.unwrapObservable(valueAccessor());
+        if (!element[hasfocusUpdatingProperty]) {
+            value ? element.focus() : element.blur();
+            ko.dependencyDetection.ignore(ko.utils.triggerEvent, null, [element, value ? "focusin" : "focusout"]); // For IE, which doesn't reliably fire "focus" or "blur" events synchronously
+        }
+    }
+};
+ko.bindingHandlers['html'] = {
+    'init': function() {
+        // Prevent binding on the dynamically-injected HTML (as developers are unlikely to expect that, and it has security implications)
+        return { 'controlsDescendantBindings': true };
+    },
+    'update': function (element, valueAccessor) {
+        // setHtml will unwrap the value if needed
+        ko.utils.setHtml(element, valueAccessor());
+    }
+};
+var withIfDomDataKey = '__ko_withIfBindingData';
+// Makes a binding like with or if
+function makeWithIfBinding(bindingKey, isWith, isNot, makeContextCallback) {
+    ko.bindingHandlers[bindingKey] = {
+        'init': function(element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
+            ko.utils.domData.set(element, withIfDomDataKey, {});
+            return { 'controlsDescendantBindings': true };
+        },
+        'update': function(element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
+            var withIfData = ko.utils.domData.get(element, withIfDomDataKey),
+                dataValue = ko.utils.unwrapObservable(valueAccessor()),
+                shouldDisplay = !isNot !== !dataValue, // equivalent to isNot ? !dataValue : !!dataValue
+                isFirstRender = !withIfData.savedNodes,
+                needsRefresh = isFirstRender || isWith || (shouldDisplay !== withIfData.didDisplayOnLastUpdate);
+
+            if (needsRefresh) {
+                if (isFirstRender) {
+                    withIfData.savedNodes = ko.utils.cloneNodes(ko.virtualElements.childNodes(element), true /* shouldCleanNodes */);
+                }
+
+                if (shouldDisplay) {
+                    if (!isFirstRender) {
+                        ko.virtualElements.setDomNodeChildren(element, ko.utils.cloneNodes(withIfData.savedNodes));
+                    }
+                    ko.applyBindingsToDescendants(makeContextCallback ? makeContextCallback(bindingContext, dataValue) : bindingContext, element);
+                } else {
+                    ko.virtualElements.emptyNode(element);
+                }
+
+                withIfData.didDisplayOnLastUpdate = shouldDisplay;
+            }
+        }
+    };
+    ko.expressionRewriting.bindingRewriteValidators[bindingKey] = false; // Can't rewrite control flow bindings
+    ko.virtualElements.allowedBindings[bindingKey] = true;
+}
+
+// Construct the actual binding handlers
+makeWithIfBinding('if');
+makeWithIfBinding('ifnot', false /* isWith */, true /* isNot */);
+makeWithIfBinding('with', true /* isWith */, false /* isNot */,
+    function(bindingContext, dataValue) {
+        return bindingContext['createChildContext'](dataValue);
+    }
+);
+function ensureDropdownSelectionIsConsistentWithModelValue(element, modelValue, preferModelValue) {
+    if (preferModelValue) {
+        if (modelValue !== ko.selectExtensions.readValue(element))
+            ko.selectExtensions.writeValue(element, modelValue);
+    }
+
+    // No matter which direction we're syncing in, we want the end result to be equality between dropdown value and model value.
+    // If they aren't equal, either we prefer the dropdown value, or the model value couldn't be represented, so either way,
+    // change the model value to match the dropdown.
+    if (modelValue !== ko.selectExtensions.readValue(element))
+        ko.dependencyDetection.ignore(ko.utils.triggerEvent, null, [element, "change"]);
+};
+
+ko.bindingHandlers['options'] = {
+    'update': function (element, valueAccessor, allBindingsAccessor) {
+        if (ko.utils.tagNameLower(element) !== "select")
+            throw new Error("options binding applies only to SELECT elements");
+
+        var selectWasPreviouslyEmpty = element.length == 0;
+        var previousSelectedValues = ko.utils.arrayMap(ko.utils.arrayFilter(element.childNodes, function (node) {
+            return node.tagName && (ko.utils.tagNameLower(node) === "option") && node.selected;
+        }), function (node) {
+            return ko.selectExtensions.readValue(node) || node.innerText || node.textContent;
+        });
+        var previousScrollTop = element.scrollTop;
+
+        var value = ko.utils.unwrapObservable(valueAccessor());
+        var selectedValue = element.value;
+
+        // Remove all existing <option>s.
+        // Need to use .remove() rather than .removeChild() for <option>s otherwise IE behaves oddly (https://github.com/SteveSanderson/knockout/issues/134)
+        while (element.length > 0) {
+            ko.cleanNode(element.options[0]);
+            element.remove(0);
+        }
+
+        if (value) {
+            var allBindings = allBindingsAccessor(),
+                includeDestroyed = allBindings['optionsIncludeDestroyed'];
+
+            if (typeof value.length != "number")
+                value = [value];
+            if (allBindings['optionsCaption']) {
+                var option = document.createElement("option");
+                ko.utils.setHtml(option, allBindings['optionsCaption']);
+                ko.selectExtensions.writeValue(option, undefined);
+                element.appendChild(option);
+            }
+
+            for (var i = 0, j = value.length; i < j; i++) {
+                // Skip destroyed items
+                var arrayEntry = value[i];
+                if (arrayEntry && arrayEntry['_destroy'] && !includeDestroyed)
+                    continue;
+
+                var option = document.createElement("option");
+
+                function applyToObject(object, predicate, defaultValue) {
+                    var predicateType = typeof predicate;
+                    if (predicateType == "function")    // Given a function; run it against the data value
+                        return predicate(object);
+                    else if (predicateType == "string") // Given a string; treat it as a property name on the data value
+                        return object[predicate];
+                    else                                // Given no optionsText arg; use the data value itself
+                        return defaultValue;
+                }
+
+                // Apply a value to the option element
+                var optionValue = applyToObject(arrayEntry, allBindings['optionsValue'], arrayEntry);
+                ko.selectExtensions.writeValue(option, ko.utils.unwrapObservable(optionValue));
+
+                // Apply some text to the option element
+                var optionText = applyToObject(arrayEntry, allBindings['optionsText'], optionValue);
+                ko.utils.setTextContent(option, optionText);
+
+                element.appendChild(option);
+            }
+
+            // IE6 doesn't like us to assign selection to OPTION nodes before they're added to the document.
+            // That's why we first added them without selection. Now it's time to set the selection.
+            var newOptions = element.getElementsByTagName("option");
+            var countSelectionsRetained = 0;
+            for (var i = 0, j = newOptions.length; i < j; i++) {
+                if (ko.utils.arrayIndexOf(previousSelectedValues, ko.selectExtensions.readValue(newOptions[i])) >= 0) {
+                    ko.utils.setOptionNodeSelectionState(newOptions[i], true);
+                    countSelectionsRetained++;
+                }
+            }
+
+            element.scrollTop = previousScrollTop;
+
+            if (selectWasPreviouslyEmpty && ('value' in allBindings)) {
+                // Ensure consistency between model value and selected option.
+                // If the dropdown is being populated for the first time here (or was otherwise previously empty),
+                // the dropdown selection state is meaningless, so we preserve the model value.
+                ensureDropdownSelectionIsConsistentWithModelValue(element, ko.utils.peekObservable(allBindings['value']), /* preferModelValue */ true);
+            }
+
+            // Workaround for IE9 bug
+            ko.utils.ensureSelectElementIsRenderedCorrectly(element);
+        }
+    }
+};
+ko.bindingHandlers['options'].optionValueDomDataKey = '__ko.optionValueDomData__';
+ko.bindingHandlers['selectedOptions'] = {
+    'init': function (element, valueAccessor, allBindingsAccessor) {
+        ko.utils.registerEventHandler(element, "change", function () {
+            var value = valueAccessor(), valueToWrite = [];
+            ko.utils.arrayForEach(element.getElementsByTagName("option"), function(node) {
+                if (node.selected)
+                    valueToWrite.push(ko.selectExtensions.readValue(node));
+            });
+            ko.expressionRewriting.writeValueToProperty(value, allBindingsAccessor, 'value', valueToWrite);
+        });
+    },
+    'update': function (element, valueAccessor) {
+        if (ko.utils.tagNameLower(element) != "select")
+            throw new Error("values binding applies only to SELECT elements");
+
+        var newValue = ko.utils.unwrapObservable(valueAccessor());
+        if (newValue && typeof newValue.length == "number") {
+            ko.utils.arrayForEach(element.getElementsByTagName("option"), function(node) {
+                var isSelected = ko.utils.arrayIndexOf(newValue, ko.selectExtensions.readValue(node)) >= 0;
+                ko.utils.setOptionNodeSelectionState(node, isSelected);
+            });
+        }
+    }
+};
+ko.bindingHandlers['style'] = {
+    'update': function (element, valueAccessor) {
+        var value = ko.utils.unwrapObservable(valueAccessor() || {});
+        for (var styleName in value) {
+            if (typeof styleName == "string") {
+                var styleValue = ko.utils.unwrapObservable(value[styleName]);
+                element.style[styleName] = styleValue || ""; // Empty string removes the value, whereas null/undefined have no effect
+            }
+        }
+    }
+};
+ko.bindingHandlers['submit'] = {
+    'init': function (element, valueAccessor, allBindingsAccessor, viewModel) {
+        if (typeof valueAccessor() != "function")
+            throw new Error("The value for a submit binding must be a function");
+        ko.utils.registerEventHandler(element, "submit", function (event) {
+            var handlerReturnValue;
+            var value = valueAccessor();
+            try { handlerReturnValue = value.call(viewModel, element); }
+            finally {
+                if (handlerReturnValue !== true) { // Normally we want to prevent default action. Developer can override this be explicitly returning true.
+                    if (event.preventDefault)
+                        event.preventDefault();
+                    else
+                        event.returnValue = false;
+                }
+            }
+        });
+    }
+};
+ko.bindingHandlers['text'] = {
+    'update': function (element, valueAccessor) {
+        ko.utils.setTextContent(element, valueAccessor());
+    }
+};
+ko.virtualElements.allowedBindings['text'] = true;
+ko.bindingHandlers['uniqueName'] = {
+    'init': function (element, valueAccessor) {
+        if (valueAccessor()) {
+            var name = "ko_unique_" + (++ko.bindingHandlers['uniqueName'].currentIndex);
+            ko.utils.setElementName(element, name);
+        }
+    }
+};
+ko.bindingHandlers['uniqueName'].currentIndex = 0;
+ko.bindingHandlers['value'] = {
+    'init': function (element, valueAccessor, allBindingsAccessor) {
+        // Always catch "change" event; possibly other events too if asked
+        var eventsToCatch = ["change"];
+        var requestedEventsToCatch = allBindingsAccessor()["valueUpdate"];
+        var propertyChangedFired = false;
+        if (requestedEventsToCatch) {
+            if (typeof requestedEventsToCatch == "string") // Allow both individual event names, and arrays of event names
+                requestedEventsToCatch = [requestedEventsToCatch];
+            ko.utils.arrayPushAll(eventsToCatch, requestedEventsToCatch);
+            eventsToCatch = ko.utils.arrayGetDistinctValues(eventsToCatch);
+        }
+
+        var valueUpdateHandler = function() {
+            propertyChangedFired = false;
+            var modelValue = valueAccessor();
+            var elementValue = ko.selectExtensions.readValue(element);
+            ko.expressionRewriting.writeValueToProperty(modelValue, allBindingsAccessor, 'value', elementValue);
+        }
+
+        // Workaround for https://github.com/SteveSanderson/knockout/issues/122
+        // IE doesn't fire "change" events on textboxes if the user selects a value from its autocomplete list
+        var ieAutoCompleteHackNeeded = ko.utils.ieVersion && element.tagName.toLowerCase() == "input" && element.type == "text"
+                                       && element.autocomplete != "off" && (!element.form || element.form.autocomplete != "off");
+        if (ieAutoCompleteHackNeeded && ko.utils.arrayIndexOf(eventsToCatch, "propertychange") == -1) {
+            ko.utils.registerEventHandler(element, "propertychange", function () { propertyChangedFired = true });
+            ko.utils.registerEventHandler(element, "blur", function() {
+                if (propertyChangedFired) {
+                    valueUpdateHandler();
+                }
+            });
+        }
+
+        ko.utils.arrayForEach(eventsToCatch, function(eventName) {
+            // The syntax "after<eventname>" means "run the handler asynchronously after the event"
+            // This is useful, for example, to catch "keydown" events after the browser has updated the control
+            // (otherwise, ko.selectExtensions.readValue(this) will receive the control's value *before* the key event)
+            var handler = valueUpdateHandler;
+            if (ko.utils.stringStartsWith(eventName, "after")) {
+                handler = function() { setTimeout(valueUpdateHandler, 0) };
+                eventName = eventName.substring("after".length);
+            }
+            ko.utils.registerEventHandler(element, eventName, handler);
+        });
+    },
+    'update': function (element, valueAccessor) {
+        var valueIsSelectOption = ko.utils.tagNameLower(element) === "select";
+        var newValue = ko.utils.unwrapObservable(valueAccessor());
+        var elementValue = ko.selectExtensions.readValue(element);
+        var valueHasChanged = (newValue != elementValue);
+
+        // JavaScript's 0 == "" behavious is unfortunate here as it prevents writing 0 to an empty text box (loose equality suggests the values are the same).
+        // We don't want to do a strict equality comparison as that is more confusing for developers in certain cases, so we specifically special case 0 != "" here.
+        if ((newValue === 0) && (elementValue !== 0) && (elementValue !== "0"))
+            valueHasChanged = true;
+
+        if (valueHasChanged) {
+            var applyValueAction = function () { ko.selectExtensions.writeValue(element, newValue); };
+            applyValueAction();
+
+            // Workaround for IE6 bug: It won't reliably apply values to SELECT nodes during the same execution thread
+            // right after you've changed the set of OPTION nodes on it. So for that node type, we'll schedule a second thread
+            // to apply the value as well.
+            var alsoApplyAsynchronously = valueIsSelectOption;
+            if (alsoApplyAsynchronously)
+                setTimeout(applyValueAction, 0);
+        }
+
+        // If you try to set a model value that can't be represented in an already-populated dropdown, reject that change,
+        // because you're not allowed to have a model value that disagrees with a visible UI selection.
+        if (valueIsSelectOption && (element.length > 0))
+            ensureDropdownSelectionIsConsistentWithModelValue(element, newValue, /* preferModelValue */ false);
+    }
+};
+ko.bindingHandlers['visible'] = {
+    'update': function (element, valueAccessor) {
+        var value = ko.utils.unwrapObservable(valueAccessor());
+        var isCurrentlyVisible = !(element.style.display == "none");
+        if (value && !isCurrentlyVisible)
+            element.style.display = "";
+        else if ((!value) && isCurrentlyVisible)
+            element.style.display = "none";
+    }
+};
+// 'click' is just a shorthand for the usual full-length event:{click:handler}
+makeEventHandlerShortcut('click');
+// If you want to make a custom template engine,
+//
+// [1] Inherit from this class (like ko.nativeTemplateEngine does)
+// [2] Override 'renderTemplateSource', supplying a function with this signature:
+//
+//        function (templateSource, bindingContext, options) {
+//            // - templateSource.text() is the text of the template you should render
+//            // - bindingContext.$data is the data you should pass into the template
+//            //   - you might also want to make bindingContext.$parent, bindingContext.$parents,
+//            //     and bindingContext.$root available in the template too
+//            // - options gives you access to any other properties set on "data-bind: { template: options }"
+//            //
+//            // Return value: an array of DOM nodes
+//        }
+//
+// [3] Override 'createJavaScriptEvaluatorBlock', supplying a function with this signature:
+//
+//        function (script) {
+//            // Return value: Whatever syntax means "Evaluate the JavaScript statement 'script' and output the result"
+//            //               For example, the jquery.tmpl template engine converts 'someScript' to '${ someScript }'
+//        }
+//
+//     This is only necessary if you want to allow data-bind attributes to reference arbitrary template variables.
+//     If you don't want to allow that, you can set the property 'allowTemplateRewriting' to false (like ko.nativeTemplateEngine does)
+//     and then you don't need to override 'createJavaScriptEvaluatorBlock'.
+
+ko.templateEngine = function () { };
+
+ko.templateEngine.prototype['renderTemplateSource'] = function (templateSource, bindingContext, options) {
+    throw new Error("Override renderTemplateSource");
+};
+
+ko.templateEngine.prototype['createJavaScriptEvaluatorBlock'] = function (script) {
+    throw new Error("Override createJavaScriptEvaluatorBlock");
+};
+
+ko.templateEngine.prototype['makeTemplateSource'] = function(template, templateDocument) {
+    // Named template
+    if (typeof template == "string") {
+        templateDocument = templateDocument || document;
+        var elem = templateDocument.getElementById(template);
+        if (!elem)
+            throw new Error("Cannot find template with ID " + template);
+        return new ko.templateSources.domElement(elem);
+    } else if ((template.nodeType == 1) || (template.nodeType == 8)) {
+        // Anonymous template
+        return new ko.templateSources.anonymousTemplate(template);
+    } else
+        throw new Error("Unknown template type: " + template);
+};
+
+ko.templateEngine.prototype['renderTemplate'] = function (template, bindingContext, options, templateDocument) {
+    var templateSource = this['makeTemplateSource'](template, templateDocument);
+    return this['renderTemplateSource'](templateSource, bindingContext, options);
+};
+
+ko.templateEngine.prototype['isTemplateRewritten'] = function (template, templateDocument) {
+    // Skip rewriting if requested
+    if (this['allowTemplateRewriting'] === false)
+        return true;
+    return this['makeTemplateSource'](template, templateDocument)['data']("isRewritten");
+};
+
+ko.templateEngine.prototype['rewriteTemplate'] = function (template, rewriterCallback, templateDocument) {
+    var templateSource = this['makeTemplateSource'](template, templateDocument);
+    var rewritten = rewriterCallback(templateSource['text']());
+    templateSource['text'](rewritten);
+    templateSource['data']("isRewritten", true);
+};
+
+ko.exportSymbol('templateEngine', ko.templateEngine);
+
+ko.templateRewriting = (function () {
+    var memoizeDataBindingAttributeSyntaxRegex = /(<[a-z]+\d*(\s+(?!data-bind=)[a-z0-9\-]+(=(\"[^\"]*\"|\'[^\']*\'))?)*\s+)data-bind=(["'])([\s\S]*?)\5/gi;
+    var memoizeVirtualContainerBindingSyntaxRegex = /<!--\s*ko\b\s*([\s\S]*?)\s*-->/g;
+
+    function validateDataBindValuesForRewriting(keyValueArray) {
+        var allValidators = ko.expressionRewriting.bindingRewriteValidators;
+        for (var i = 0; i < keyValueArray.length; i++) {
+            var key = keyValueArray[i]['key'];
+            if (allValidators.hasOwnProperty(key)) {
+                var validator = allValidators[key];
+
+                if (typeof validator === "function") {
+                    var possibleErrorMessage = validator(keyValueArray[i]['value']);
+                    if (possibleErrorMessage)
+                        throw new Error(possibleErrorMessage);
+                } else if (!validator) {
+                    throw new Error("This template engine does not support the '" + key + "' binding within its templates");
+                }
+            }
+        }
+    }
+
+    function constructMemoizedTagReplacement(dataBindAttributeValue, tagToRetain, templateEngine) {
+        var dataBindKeyValueArray = ko.expressionRewriting.parseObjectLiteral(dataBindAttributeValue);
+        validateDataBindValuesForRewriting(dataBindKeyValueArray);
+        var rewrittenDataBindAttributeValue = ko.expressionRewriting.preProcessBindings(dataBindKeyValueArray);
+
+        // For no obvious reason, Opera fails to evaluate rewrittenDataBindAttributeValue unless it's wrapped in an additional
+        // anonymous function, even though Opera's built-in debugger can evaluate it anyway. No other browser requires this
+        // extra indirection.
+        var applyBindingsToNextSiblingScript =
+            "ko.__tr_ambtns(function($context,$element){return(function(){return{ " + rewrittenDataBindAttributeValue + " } })()})";
+        return templateEngine['createJavaScriptEvaluatorBlock'](applyBindingsToNextSiblingScript) + tagToRetain;
+    }
+
+    return {
+        ensureTemplateIsRewritten: function (template, templateEngine, templateDocument) {
+            if (!templateEngine['isTemplateRewritten'](template, templateDocument))
+                templateEngine['rewriteTemplate'](template, function (htmlString) {
+                    return ko.templateRewriting.memoizeBindingAttributeSyntax(htmlString, templateEngine);
+                }, templateDocument);
+        },
+
+        memoizeBindingAttributeSyntax: function (htmlString, templateEngine) {
+            return htmlString.replace(memoizeDataBindingAttributeSyntaxRegex, function () {
+                return constructMemoizedTagReplacement(/* dataBindAttributeValue: */ arguments[6], /* tagToRetain: */ arguments[1], templateEngine);
+            }).replace(memoizeVirtualContainerBindingSyntaxRegex, function() {
+                return constructMemoizedTagReplacement(/* dataBindAttributeValue: */ arguments[1], /* tagToRetain: */ "<!-- ko -->", templateEngine);
+            });
+        },
+
+        applyMemoizedBindingsToNextSibling: function (bindings) {
+            return ko.memoization.memoize(function (domNode, bindingContext) {
+                if (domNode.nextSibling)
+                    ko.applyBindingsToNode(domNode.nextSibling, bindings, bindingContext);
+            });
+        }
+    }
+})();
+
+
+// Exported only because it has to be referenced by string lookup from within rewritten template
+ko.exportSymbol('__tr_ambtns', ko.templateRewriting.applyMemoizedBindingsToNextSibling);
+(function() {
+    // A template source represents a read/write way of accessing a template. This is to eliminate the need for template loading/saving
+    // logic to be duplicated in every template engine (and means they can all work with anonymous templates, etc.)
+    //
+    // Two are provided by default:
+    //  1. ko.templateSources.domElement       - reads/writes the text content of an arbitrary DOM element
+    //  2. ko.templateSources.anonymousElement - uses ko.utils.domData to read/write text *associated* with the DOM element, but
+    //                                           without reading/writing the actual element text content, since it will be overwritten
+    //                                           with the rendered template output.
+    // You can implement your own template source if you want to fetch/store templates somewhere other than in DOM elements.
+    // Template sources need to have the following functions:
+    //   text() 			- returns the template text from your storage location
+    //   text(value)		- writes the supplied template text to your storage location
+    //   data(key)			- reads values stored using data(key, value) - see below
+    //   data(key, value)	- associates "value" with this template and the key "key". Is used to store information like "isRewritten".
+    //
+    // Optionally, template sources can also have the following functions:
+    //   nodes()            - returns a DOM element containing the nodes of this template, where available
+    //   nodes(value)       - writes the given DOM element to your storage location
+    // If a DOM element is available for a given template source, template engines are encouraged to use it in preference over text()
+    // for improved speed. However, all templateSources must supply text() even if they don't supply nodes().
+    //
+    // Once you've implemented a templateSource, make your template engine use it by subclassing whatever template engine you were
+    // using and overriding "makeTemplateSource" to return an instance of your custom template source.
+
+    ko.templateSources = {};
+
+    // ---- ko.templateSources.domElement -----
+
+    ko.templateSources.domElement = function(element) {
+        this.domElement = element;
+    }
+
+    ko.templateSources.domElement.prototype['text'] = function(/* valueToWrite */) {
+        var tagNameLower = ko.utils.tagNameLower(this.domElement),
+            elemContentsProperty = tagNameLower === "script" ? "text"
+                                 : tagNameLower === "textarea" ? "value"
+                                 : "innerHTML";
+
+        if (arguments.length == 0) {
+            return this.domElement[elemContentsProperty];
+        } else {
+            var valueToWrite = arguments[0];
+            if (elemContentsProperty === "innerHTML")
+                ko.utils.setHtml(this.domElement, valueToWrite);
+            else
+                this.domElement[elemContentsProperty] = valueToWrite;
+        }
+    };
+
+    ko.templateSources.domElement.prototype['data'] = function(key /*, valueToWrite */) {
+        if (arguments.length === 1) {
+            return ko.utils.domData.get(this.domElement, "templateSourceData_" + key);
+        } else {
+            ko.utils.domData.set(this.domElement, "templateSourceData_" + key, arguments[1]);
+        }
+    };
+
+    // ---- ko.templateSources.anonymousTemplate -----
+    // Anonymous templates are normally saved/retrieved as DOM nodes through "nodes".
+    // For compatibility, you can also read "text"; it will be serialized from the nodes on demand.
+    // Writing to "text" is still supported, but then the template data will not be available as DOM nodes.
+
+    var anonymousTemplatesDomDataKey = "__ko_anon_template__";
+    ko.templateSources.anonymousTemplate = function(element) {
+        this.domElement = element;
+    }
+    ko.templateSources.anonymousTemplate.prototype = new ko.templateSources.domElement();
+    ko.templateSources.anonymousTemplate.prototype['text'] = function(/* valueToWrite */) {
+        if (arguments.length == 0) {
+            var templateData = ko.utils.domData.get(this.domElement, anonymousTemplatesDomDataKey) || {};
+            if (templateData.textData === undefined && templateData.containerData)
+                templateData.textData = templateData.containerData.innerHTML;
+            return templateData.textData;
+        } else {
+            var valueToWrite = arguments[0];
+            ko.utils.domData.set(this.domElement, anonymousTemplatesDomDataKey, {textData: valueToWrite});
+        }
+    };
+    ko.templateSources.domElement.prototype['nodes'] = function(/* valueToWrite */) {
+        if (arguments.length == 0) {
+            var templateData = ko.utils.domData.get(this.domElement, anonymousTemplatesDomDataKey) || {};
+            return templateData.containerData;
+        } else {
+            var valueToWrite = arguments[0];
+            ko.utils.domData.set(this.domElement, anonymousTemplatesDomDataKey, {containerData: valueToWrite});
+        }
+    };
+
+    ko.exportSymbol('templateSources', ko.templateSources);
+    ko.exportSymbol('templateSources.domElement', ko.templateSources.domElement);
+    ko.exportSymbol('templateSources.anonymousTemplate', ko.templateSources.anonymousTemplate);
+})();
+(function () {
+    var _templateEngine;
+    ko.setTemplateEngine = function (templateEngine) {
+        if ((templateEngine != undefined) && !(templateEngine instanceof ko.templateEngine))
+            throw new Error("templateEngine must inherit from ko.templateEngine");
+        _templateEngine = templateEngine;
+    }
+
+    function invokeForEachNodeOrCommentInContinuousRange(firstNode, lastNode, action) {
+        var node, nextInQueue = firstNode, firstOutOfRangeNode = ko.virtualElements.nextSibling(lastNode);
+        while (nextInQueue && ((node = nextInQueue) !== firstOutOfRangeNode)) {
+            nextInQueue = ko.virtualElements.nextSibling(node);
+            if (node.nodeType === 1 || node.nodeType === 8)
+                action(node);
+        }
+    }
+
+    function activateBindingsOnContinuousNodeArray(continuousNodeArray, bindingContext) {
+        // To be used on any nodes that have been rendered by a template and have been inserted into some parent element
+        // Walks through continuousNodeArray (which *must* be continuous, i.e., an uninterrupted sequence of sibling nodes, because
+        // the algorithm for walking them relies on this), and for each top-level item in the virtual-element sense,
+        // (1) Does a regular "applyBindings" to associate bindingContext with this node and to activate any non-memoized bindings
+        // (2) Unmemoizes any memos in the DOM subtree (e.g., to activate bindings that had been memoized during template rewriting)
+
+        if (continuousNodeArray.length) {
+            var firstNode = continuousNodeArray[0], lastNode = continuousNodeArray[continuousNodeArray.length - 1];
+
+            // Need to applyBindings *before* unmemoziation, because unmemoization might introduce extra nodes (that we don't want to re-bind)
+            // whereas a regular applyBindings won't introduce new memoized nodes
+            invokeForEachNodeOrCommentInContinuousRange(firstNode, lastNode, function(node) {
+                ko.applyBindings(bindingContext, node);
+            });
+            invokeForEachNodeOrCommentInContinuousRange(firstNode, lastNode, function(node) {
+                ko.memoization.unmemoizeDomNodeAndDescendants(node, [bindingContext]);
+            });
+        }
+    }
+
+    function getFirstNodeFromPossibleArray(nodeOrNodeArray) {
+        return nodeOrNodeArray.nodeType ? nodeOrNodeArray
+                                        : nodeOrNodeArray.length > 0 ? nodeOrNodeArray[0]
+                                        : null;
+    }
+
+    function executeTemplate(targetNodeOrNodeArray, renderMode, template, bindingContext, options) {
+        options = options || {};
+        var firstTargetNode = targetNodeOrNodeArray && getFirstNodeFromPossibleArray(targetNodeOrNodeArray);
+        var templateDocument = firstTargetNode && firstTargetNode.ownerDocument;
+        var templateEngineToUse = (options['templateEngine'] || _templateEngine);
+        ko.templateRewriting.ensureTemplateIsRewritten(template, templateEngineToUse, templateDocument);
+        var renderedNodesArray = templateEngineToUse['renderTemplate'](template, bindingContext, options, templateDocument);
+
+        // Loosely check result is an array of DOM nodes
+        if ((typeof renderedNodesArray.length != "number") || (renderedNodesArray.length > 0 && typeof renderedNodesArray[0].nodeType != "number"))
+            throw new Error("Template engine must return an array of DOM nodes");
+
+        var haveAddedNodesToParent = false;
+        switch (renderMode) {
+            case "replaceChildren":
+                ko.virtualElements.setDomNodeChildren(targetNodeOrNodeArray, renderedNodesArray);
+                haveAddedNodesToParent = true;
+                break;
+            case "replaceNode":
+                ko.utils.replaceDomNodes(targetNodeOrNodeArray, renderedNodesArray);
+                haveAddedNodesToParent = true;
+                break;
+            case "ignoreTargetNode": break;
+            default:
+                throw new Error("Unknown renderMode: " + renderMode);
+        }
+
+        if (haveAddedNodesToParent) {
+            activateBindingsOnContinuousNodeArray(renderedNodesArray, bindingContext);
+            if (options['afterRender'])
+                ko.dependencyDetection.ignore(options['afterRender'], null, [renderedNodesArray, bindingContext['$data']]);
+        }
+
+        return renderedNodesArray;
+    }
+
+    ko.renderTemplate = function (template, dataOrBindingContext, options, targetNodeOrNodeArray, renderMode) {
+        options = options || {};
+        if ((options['templateEngine'] || _templateEngine) == undefined)
+            throw new Error("Set a template engine before calling renderTemplate");
+        renderMode = renderMode || "replaceChildren";
+
+        if (targetNodeOrNodeArray) {
+            var firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray);
+
+            var whenToDispose = function () { return (!firstTargetNode) || !ko.utils.domNodeIsAttachedToDocument(firstTargetNode); }; // Passive disposal (on next evaluation)
+            var activelyDisposeWhenNodeIsRemoved = (firstTargetNode && renderMode == "replaceNode") ? firstTargetNode.parentNode : firstTargetNode;
+
+            return ko.dependentObservable( // So the DOM is automatically updated when any dependency changes
+                function () {
+                    // Ensure we've got a proper binding context to work with
+                    var bindingContext = (dataOrBindingContext && (dataOrBindingContext instanceof ko.bindingContext))
+                        ? dataOrBindingContext
+                        : new ko.bindingContext(ko.utils.unwrapObservable(dataOrBindingContext));
+
+                    // Support selecting template as a function of the data being rendered
+                    var templateName = typeof(template) == 'function' ? template(bindingContext['$data'], bindingContext) : template;
+
+                    var renderedNodesArray = executeTemplate(targetNodeOrNodeArray, renderMode, templateName, bindingContext, options);
+                    if (renderMode == "replaceNode") {
+                        targetNodeOrNodeArray = renderedNodesArray;
+                        firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray);
+                    }
+                },
+                null,
+                { disposeWhen: whenToDispose, disposeWhenNodeIsRemoved: activelyDisposeWhenNodeIsRemoved }
+            );
+        } else {
+            // We don't yet have a DOM node to evaluate, so use a memo and render the template later when there is a DOM node
+            return ko.memoization.memoize(function (domNode) {
+                ko.renderTemplate(template, dataOrBindingContext, options, domNode, "replaceNode");
+            });
+        }
+    };
+
+    ko.renderTemplateForEach = function (template, arrayOrObservableArray, options, targetNode, parentBindingContext) {
+        // Since setDomNodeChildrenFromArrayMapping always calls executeTemplateForArrayItem and then
+        // activateBindingsCallback for added items, we can store the binding context in the former to use in the latter.
+        var arrayItemContext;
+
+        // This will be called by setDomNodeChildrenFromArrayMapping to get the nodes to add to targetNode
+        var executeTemplateForArrayItem = function (arrayValue, index) {
+            // Support selecting template as a function of the data being rendered
+            arrayItemContext = parentBindingContext['createChildContext'](ko.utils.unwrapObservable(arrayValue), options['as']);
+            arrayItemContext['$index'] = index;
+            var templateName = typeof(template) == 'function' ? template(arrayValue, arrayItemContext) : template;
+            return executeTemplate(null, "ignoreTargetNode", templateName, arrayItemContext, options);
+        }
+
+        // This will be called whenever setDomNodeChildrenFromArrayMapping has added nodes to targetNode
+        var activateBindingsCallback = function(arrayValue, addedNodesArray, index) {
+            activateBindingsOnContinuousNodeArray(addedNodesArray, arrayItemContext);
+            if (options['afterRender'])
+                options['afterRender'](addedNodesArray, arrayValue);
+        };
+
+        return ko.dependentObservable(function () {
+            var unwrappedArray = ko.utils.unwrapObservable(arrayOrObservableArray) || [];
+            if (typeof unwrappedArray.length == "undefined") // Coerce single value into array
+                unwrappedArray = [unwrappedArray];
+
+            // Filter out any entries marked as destroyed
+            var filteredArray = ko.utils.arrayFilter(unwrappedArray, function(item) {
+                return options['includeDestroyed'] || item === undefined || item === null || !ko.utils.unwrapObservable(item['_destroy']);
+            });
+
+            // Call setDomNodeChildrenFromArrayMapping, ignoring any observables unwrapped within (most likely from a callback function).
+            // If the array items are observables, though, they will be unwrapped in executeTemplateForArrayItem and managed within setDomNodeChildrenFromArrayMapping.
+            ko.dependencyDetection.ignore(ko.utils.setDomNodeChildrenFromArrayMapping, null, [targetNode, filteredArray, executeTemplateForArrayItem, options, activateBindingsCallback]);
+
+        }, null, { disposeWhenNodeIsRemoved: targetNode });
+    };
+
+    var templateComputedDomDataKey = '__ko__templateComputedDomDataKey__';
+    function disposeOldComputedAndStoreNewOne(element, newComputed) {
+        var oldComputed = ko.utils.domData.get(element, templateComputedDomDataKey);
+        if (oldComputed && (typeof(oldComputed.dispose) == 'function'))
+            oldComputed.dispose();
+        ko.utils.domData.set(element, templateComputedDomDataKey, (newComputed && newComputed.isActive()) ? newComputed : undefined);
+    }
+
+    ko.bindingHandlers['template'] = {
+        'init': function(element, valueAccessor) {
+            // Support anonymous templates
+            var bindingValue = ko.utils.unwrapObservable(valueAccessor());
+            if ((typeof bindingValue != "string") && (!bindingValue['name']) && (element.nodeType == 1 || element.nodeType == 8)) {
+                // It's an anonymous template - store the element contents, then clear the element
+                var templateNodes = element.nodeType == 1 ? element.childNodes : ko.virtualElements.childNodes(element),
+                    container = ko.utils.moveCleanedNodesToContainerElement(templateNodes); // This also removes the nodes from their current parent
+                new ko.templateSources.anonymousTemplate(element)['nodes'](container);
+            }
+            return { 'controlsDescendantBindings': true };
+        },
+        'update': function (element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
+            var templateName = ko.utils.unwrapObservable(valueAccessor()),
+                options = {},
+                shouldDisplay = true,
+                dataValue,
+                templateComputed = null;
+
+            if (typeof templateName != "string") {
+                options = templateName;
+                templateName = options['name'];
+
+                // Support "if"/"ifnot" conditions
+                if ('if' in options)
+                    shouldDisplay = ko.utils.unwrapObservable(options['if']);
+                if (shouldDisplay && 'ifnot' in options)
+                    shouldDisplay = !ko.utils.unwrapObservable(options['ifnot']);
+
+                dataValue = ko.utils.unwrapObservable(options['data']);
+            }
+
+            if ('foreach' in options) {
+                // Render once for each data point (treating data set as empty if shouldDisplay==false)
+                var dataArray = (shouldDisplay && options['foreach']) || [];
+                templateComputed = ko.renderTemplateForEach(templateName || element, dataArray, options, element, bindingContext);
+            } else if (!shouldDisplay) {
+                ko.virtualElements.emptyNode(element);
+            } else {
+                // Render once for this single data point (or use the viewModel if no data was provided)
+                var innerBindingContext = ('data' in options) ?
+                    bindingContext['createChildContext'](dataValue, options['as']) :  // Given an explitit 'data' value, we create a child binding context for it
+                    bindingContext;                                                        // Given no explicit 'data' value, we retain the same binding context
+                templateComputed = ko.renderTemplate(templateName || element, innerBindingContext, options, element);
+            }
+
+            // It only makes sense to have a single template computed per element (otherwise which one should have its output displayed?)
+            disposeOldComputedAndStoreNewOne(element, templateComputed);
+        }
+    };
+
+    // Anonymous templates can't be rewritten. Give a nice error message if you try to do it.
+    ko.expressionRewriting.bindingRewriteValidators['template'] = function(bindingValue) {
+        var parsedBindingValue = ko.expressionRewriting.parseObjectLiteral(bindingValue);
+
+        if ((parsedBindingValue.length == 1) && parsedBindingValue[0]['unknown'])
+            return null; // It looks like a string literal, not an object literal, so treat it as a named template (which is allowed for rewriting)
+
+        if (ko.expressionRewriting.keyValueArrayContainsKey(parsedBindingValue, "name"))
+            return null; // Named templates can be rewritten, so return "no error"
+        return "This template engine does not support anonymous templates nested within its templates";
+    };
+
+    ko.virtualElements.allowedBindings['template'] = true;
+})();
+
+ko.exportSymbol('setTemplateEngine', ko.setTemplateEngine);
+ko.exportSymbol('renderTemplate', ko.renderTemplate);
+
+ko.utils.compareArrays = (function () {
+    var statusNotInOld = 'added', statusNotInNew = 'deleted';
+
+    // Simple calculation based on Levenshtein distance.
+    function compareArrays(oldArray, newArray, dontLimitMoves) {
+        oldArray = oldArray || [];
+        newArray = newArray || [];
+
+        if (oldArray.length <= newArray.length)
+            return compareSmallArrayToBigArray(oldArray, newArray, statusNotInOld, statusNotInNew, dontLimitMoves);
+        else
+            return compareSmallArrayToBigArray(newArray, oldArray, statusNotInNew, statusNotInOld, dontLimitMoves);
+    }
+
+    function compareSmallArrayToBigArray(smlArray, bigArray, statusNotInSml, statusNotInBig, dontLimitMoves) {
+        var myMin = Math.min,
+            myMax = Math.max,
+            editDistanceMatrix = [],
+            smlIndex, smlIndexMax = smlArray.length,
+            bigIndex, bigIndexMax = bigArray.length,
+            compareRange = (bigIndexMax - smlIndexMax) || 1,
+            maxDistance = smlIndexMax + bigIndexMax + 1,
+            thisRow, lastRow,
+            bigIndexMaxForRow, bigIndexMinForRow;
+
+        for (smlIndex = 0; smlIndex <= smlIndexMax; smlIndex++) {
+            lastRow = thisRow;
+            editDistanceMatrix.push(thisRow = []);
+            bigIndexMaxForRow = myMin(bigIndexMax, smlIndex + compareRange);
+            bigIndexMinForRow = myMax(0, smlIndex - 1);
+            for (bigIndex = bigIndexMinForRow; bigIndex <= bigIndexMaxForRow; bigIndex++) {
+                if (!bigIndex)
+                    thisRow[bigIndex] = smlIndex + 1;
+                else if (!smlIndex)  // Top row - transform empty array into new array via additions
+                    thisRow[bigIndex] = bigIndex + 1;
+                else if (smlArray[smlIndex - 1] === bigArray[bigIndex - 1])
+                    thisRow[bigIndex] = lastRow[bigIndex - 1];                  // copy value (no edit)
+                else {
+                    var northDistance = lastRow[bigIndex] || maxDistance;       // not in big (deletion)
+                    var westDistance = thisRow[bigIndex - 1] || maxDistance;    // not in small (addition)
+                    thisRow[bigIndex] = myMin(northDistance, westDistance) + 1;
+                }
+            }
+        }
+
+        var editScript = [], meMinusOne, notInSml = [], notInBig = [];
+        for (smlIndex = smlIndexMax, bigIndex = bigIndexMax; smlIndex || bigIndex;) {
+            meMinusOne = editDistanceMatrix[smlIndex][bigIndex] - 1;
+            if (bigIndex && meMinusOne === editDistanceMatrix[smlIndex][bigIndex-1]) {
+                notInSml.push(editScript[editScript.length] = {     // added
+                    'status': statusNotInSml,
+                    'value': bigArray[--bigIndex],
+                    'index': bigIndex });
+            } else if (smlIndex && meMinusOne === editDistanceMatrix[smlIndex - 1][bigIndex]) {
+                notInBig.push(editScript[editScript.length] = {     // deleted
+                    'status': statusNotInBig,
+                    'value': smlArray[--smlIndex],
+                    'index': smlIndex });
+            } else {
+                editScript.push({
+                    'status': "retained",
+                    'value': bigArray[--bigIndex] });
+                --smlIndex;
+            }
+        }
+
+        if (notInSml.length && notInBig.length) {
+            // Set a limit on the number of consecutive non-matching comparisons; having it a multiple of
+            // smlIndexMax keeps the time complexity of this algorithm linear.
+            var limitFailedCompares = smlIndexMax * 10, failedCompares,
+                a, d, notInSmlItem, notInBigItem;
+            // Go through the items that have been added and deleted and try to find matches between them.
+            for (failedCompares = a = 0; (dontLimitMoves || failedCompares < limitFailedCompares) && (notInSmlItem = notInSml[a]); a++) {
+                for (d = 0; notInBigItem = notInBig[d]; d++) {
+                    if (notInSmlItem['value'] === notInBigItem['value']) {
+                        notInSmlItem['moved'] = notInBigItem['index'];
+                        notInBigItem['moved'] = notInSmlItem['index'];
+                        notInBig.splice(d,1);       // This item is marked as moved; so remove it from notInBig list
+                        failedCompares = d = 0;     // Reset failed compares count because we're checking for consecutive failures
+                        break;
+                    }
+                }
+                failedCompares += d;
+            }
+        }
+        return editScript.reverse();
+    }
+
+    return compareArrays;
+})();
+
+ko.exportSymbol('utils.compareArrays', ko.utils.compareArrays);
+
+(function () {
+    // Objective:
+    // * Given an input array, a container DOM node, and a function from array elements to arrays of DOM nodes,
+    //   map the array elements to arrays of DOM nodes, concatenate together all these arrays, and use them to populate the container DOM node
+    // * Next time we're given the same combination of things (with the array possibly having mutated), update the container DOM node
+    //   so that its children is again the concatenation of the mappings of the array elements, but don't re-map any array elements that we
+    //   previously mapped - retain those nodes, and just insert/delete other ones
+
+    // "callbackAfterAddingNodes" will be invoked after any "mapping"-generated nodes are inserted into the container node
+    // You can use this, for example, to activate bindings on those nodes.
+
+    function fixUpNodesToBeMovedOrRemoved(contiguousNodeArray) {
+        // Before moving, deleting, or replacing a set of nodes that were previously outputted by the "map" function, we have to reconcile
+        // them against what is in the DOM right now. It may be that some of the nodes have already been removed from the document,
+        // or that new nodes might have been inserted in the middle, for example by a binding. Also, there may previously have been
+        // leading comment nodes (created by rewritten string-based templates) that have since been removed during binding.
+        // So, this function translates the old "map" output array into its best guess of what set of current DOM nodes should be removed.
+        //
+        // Rules:
+        //   [A] Any leading nodes that aren't in the document any more should be ignored
+        //       These most likely correspond to memoization nodes that were already removed during binding
+        //       See https://github.com/SteveSanderson/knockout/pull/440
+        //   [B] We want to output a contiguous series of nodes that are still in the document. So, ignore any nodes that
+        //       have already been removed, and include any nodes that have been inserted among the previous collection
+
+        // Rule [A]
+        while (contiguousNodeArray.length && !ko.utils.domNodeIsAttachedToDocument(contiguousNodeArray[0]))
+            contiguousNodeArray.splice(0, 1);
+
+        // Rule [B]
+        if (contiguousNodeArray.length > 1) {
+            // Build up the actual new contiguous node set
+            var current = contiguousNodeArray[0], last = contiguousNodeArray[contiguousNodeArray.length - 1], newContiguousSet = [current];
+            while (current !== last) {
+                current = current.nextSibling;
+                if (!current) // Won't happen, except if the developer has manually removed some DOM elements (then we're in an undefined scenario)
+                    return;
+                newContiguousSet.push(current);
+            }
+
+            // ... then mutate the input array to match this.
+            // (The following line replaces the contents of contiguousNodeArray with newContiguousSet)
+            Array.prototype.splice.apply(contiguousNodeArray, [0, contiguousNodeArray.length].concat(newContiguousSet));
+        }
+        return contiguousNodeArray;
+    }
+
+    function mapNodeAndRefreshWhenChanged(containerNode, mapping, valueToMap, callbackAfterAddingNodes, index) {
+        // Map this array value inside a dependentObservable so we re-map when any dependency changes
+        var mappedNodes = [];
+        var dependentObservable = ko.dependentObservable(function() {
+            var newMappedNodes = mapping(valueToMap, index) || [];
+
+            // On subsequent evaluations, just replace the previously-inserted DOM nodes
+            if (mappedNodes.length > 0) {
+                ko.utils.replaceDomNodes(fixUpNodesToBeMovedOrRemoved(mappedNodes), newMappedNodes);
+                if (callbackAfterAddingNodes)
+                    ko.dependencyDetection.ignore(callbackAfterAddingNodes, null, [valueToMap, newMappedNodes, index]);
+            }
+
+            // Replace the contents of the mappedNodes array, thereby updating the record
+            // of which nodes would be deleted if valueToMap was itself later removed
+            mappedNodes.splice(0, mappedNodes.length);
+            ko.utils.arrayPushAll(mappedNodes, newMappedNodes);
+        }, null, { disposeWhenNodeIsRemoved: containerNode, disposeWhen: function() { return (mappedNodes.length == 0) || !ko.utils.domNodeIsAttachedToDocument(mappedNodes[0]) } });
+        return { mappedNodes : mappedNodes, dependentObservable : (dependentObservable.isActive() ? dependentObservable : undefined) };
+    }
+
+    var lastMappingResultDomDataKey = "setDomNodeChildrenFromArrayMapping_lastMappingResult";
+
+    ko.utils.setDomNodeChildrenFromArrayMapping = function (domNode, array, mapping, options, callbackAfterAddingNodes) {
+        // Compare the provided array against the previous one
+        array = array || [];
+        options = options || {};
+        var isFirstExecution = ko.utils.domData.get(domNode, lastMappingResultDomDataKey) === undefined;
+        var lastMappingResult = ko.utils.domData.get(domNode, lastMappingResultDomDataKey) || [];
+        var lastArray = ko.utils.arrayMap(lastMappingResult, function (x) { return x.arrayEntry; });
+        var editScript = ko.utils.compareArrays(lastArray, array);
+
+        // Build the new mapping result
+        var newMappingResult = [];
+        var lastMappingResultIndex = 0;
+        var newMappingResultIndex = 0;
+
+        var nodesToDelete = [];
+        var itemsToProcess = [];
+        var itemsForBeforeRemoveCallbacks = [];
+        var itemsForMoveCallbacks = [];
+        var itemsForAfterAddCallbacks = [];
+        var mapData;
+
+        function itemMovedOrRetained(editScriptIndex, oldPosition) {
+            mapData = lastMappingResult[oldPosition];
+            if (newMappingResultIndex !== oldPosition)
+                itemsForMoveCallbacks[editScriptIndex] = mapData;
+            // Since updating the index might change the nodes, do so before calling fixUpNodesToBeMovedOrRemoved
+            mapData.indexObservable(newMappingResultIndex++);
+            fixUpNodesToBeMovedOrRemoved(mapData.mappedNodes);
+            newMappingResult.push(mapData);
+            itemsToProcess.push(mapData);
+        }
+
+        function callCallback(callback, items) {
+            if (callback) {
+                for (var i = 0, n = items.length; i < n; i++) {
+                    if (items[i]) {
+                        ko.utils.arrayForEach(items[i].mappedNodes, function(node) {
+                            callback(node, i, items[i].arrayEntry);
+                        });
+                    }
+                }
+            }
+        }
+
+        for (var i = 0, editScriptItem, movedIndex; editScriptItem = editScript[i]; i++) {
+            movedIndex = editScriptItem['moved'];
+            switch (editScriptItem['status']) {
+                case "deleted":
+                    if (movedIndex === undefined) {
+                        mapData = lastMappingResult[lastMappingResultIndex];
+
+                        // Stop tracking changes to the mapping for these nodes
+                        if (mapData.dependentObservable)
+                            mapData.dependentObservable.dispose();
+
+                        // Queue these nodes for later removal
+                        nodesToDelete.push.apply(nodesToDelete, fixUpNodesToBeMovedOrRemoved(mapData.mappedNodes));
+                        if (options['beforeRemove']) {
+                            itemsForBeforeRemoveCallbacks[i] = mapData;
+                            itemsToProcess.push(mapData);
+                        }
+                    }
+                    lastMappingResultIndex++;
+                    break;
+
+                case "retained":
+                    itemMovedOrRetained(i, lastMappingResultIndex++);
+                    break;
+
+                case "added":
+                    if (movedIndex !== undefined) {
+                        itemMovedOrRetained(i, movedIndex);
+                    } else {
+                        mapData = { arrayEntry: editScriptItem['value'], indexObservable: ko.observable(newMappingResultIndex++) };
+                        newMappingResult.push(mapData);
+                        itemsToProcess.push(mapData);
+                        if (!isFirstExecution)
+                            itemsForAfterAddCallbacks[i] = mapData;
+                    }
+                    break;
+            }
+        }
+
+        // Call beforeMove first before any changes have been made to the DOM
+        callCallback(options['beforeMove'], itemsForMoveCallbacks);
+
+        // Next remove nodes for deleted items (or just clean if there's a beforeRemove callback)
+        ko.utils.arrayForEach(nodesToDelete, options['beforeRemove'] ? ko.cleanNode : ko.removeNode);
+
+        // Next add/reorder the remaining items (will include deleted items if there's a beforeRemove callback)
+        for (var i = 0, nextNode = ko.virtualElements.firstChild(domNode), lastNode, node; mapData = itemsToProcess[i]; i++) {
+            // Get nodes for newly added items
+            if (!mapData.mappedNodes)
+                ko.utils.extend(mapData, mapNodeAndRefreshWhenChanged(domNode, mapping, mapData.arrayEntry, callbackAfterAddingNodes, mapData.indexObservable));
+
+            // Put nodes in the right place if they aren't there already
+            for (var j = 0; node = mapData.mappedNodes[j]; nextNode = node.nextSibling, lastNode = node, j++) {
+                if (node !== nextNode)
+                    ko.virtualElements.insertAfter(domNode, node, lastNode);
+            }
+
+            // Run the callbacks for newly added nodes (for example, to apply bindings, etc.)
+            if (!mapData.initialized && callbackAfterAddingNodes) {
+                callbackAfterAddingNodes(mapData.arrayEntry, mapData.mappedNodes, mapData.indexObservable);
+                mapData.initialized = true;
+            }
+        }
+
+        // If there's a beforeRemove callback, call it after reordering.
+        // Note that we assume that the beforeRemove callback will usually be used to remove the nodes using
+        // some sort of animation, which is why we first reorder the nodes that will be removed. If the
+        // callback instead removes the nodes right away, it would be more efficient to skip reordering them.
+        // Perhaps we'll make that change in the future if this scenario becomes more common.
+        callCallback(options['beforeRemove'], itemsForBeforeRemoveCallbacks);
+
+        // Finally call afterMove and afterAdd callbacks
+        callCallback(options['afterMove'], itemsForMoveCallbacks);
+        callCallback(options['afterAdd'], itemsForAfterAddCallbacks);
+
+        // Store a copy of the array items we just considered so we can difference it next time
+        ko.utils.domData.set(domNode, lastMappingResultDomDataKey, newMappingResult);
+    }
+})();
+
+ko.exportSymbol('utils.setDomNodeChildrenFromArrayMapping', ko.utils.setDomNodeChildrenFromArrayMapping);
+ko.nativeTemplateEngine = function () {
+    this['allowTemplateRewriting'] = false;
+}
+
+ko.nativeTemplateEngine.prototype = new ko.templateEngine();
+ko.nativeTemplateEngine.prototype['renderTemplateSource'] = function (templateSource, bindingContext, options) {
+    var useNodesIfAvailable = !(ko.utils.ieVersion < 9), // IE<9 cloneNode doesn't work properly
+        templateNodesFunc = useNodesIfAvailable ? templateSource['nodes'] : null,
+        templateNodes = templateNodesFunc ? templateSource['nodes']() : null;
+
+    if (templateNodes) {
+        return ko.utils.makeArray(templateNodes.cloneNode(true).childNodes);
+    } else {
+        var templateText = templateSource['text']();
+        return ko.utils.parseHtmlFragment(templateText);
+    }
+};
+
+ko.nativeTemplateEngine.instance = new ko.nativeTemplateEngine();
+ko.setTemplateEngine(ko.nativeTemplateEngine.instance);
+
+ko.exportSymbol('nativeTemplateEngine', ko.nativeTemplateEngine);
+(function() {
+    ko.jqueryTmplTemplateEngine = function () {
+        // Detect which version of jquery-tmpl you're using. Unfortunately jquery-tmpl
+        // doesn't expose a version number, so we have to infer it.
+        // Note that as of Knockout 1.3, we only support jQuery.tmpl 1.0.0pre and later,
+        // which KO internally refers to as version "2", so older versions are no longer detected.
+        var jQueryTmplVersion = this.jQueryTmplVersion = (function() {
+            if ((typeof(jQuery) == "undefined") || !(jQuery['tmpl']))
+                return 0;
+            // Since it exposes no official version number, we use our own numbering system. To be updated as jquery-tmpl evolves.
+            try {
+                if (jQuery['tmpl']['tag']['tmpl']['open'].toString().indexOf('__') >= 0) {
+                    // Since 1.0.0pre, custom tags should append markup to an array called "__"
+                    return 2; // Final version of jquery.tmpl
+                }
+            } catch(ex) { /* Apparently not the version we were looking for */ }
+
+            return 1; // Any older version that we don't support
+        })();
+
+        function ensureHasReferencedJQueryTemplates() {
+            if (jQueryTmplVersion < 2)
+                throw new Error("Your version of jQuery.tmpl is too old. Please upgrade to jQuery.tmpl 1.0.0pre or later.");
+        }
+
+        function executeTemplate(compiledTemplate, data, jQueryTemplateOptions) {
+            return jQuery['tmpl'](compiledTemplate, data, jQueryTemplateOptions);
+        }
+
+        this['renderTemplateSource'] = function(templateSource, bindingContext, options) {
+            options = options || {};
+            ensureHasReferencedJQueryTemplates();
+
+            // Ensure we have stored a precompiled version of this template (don't want to reparse on every render)
+            var precompiled = templateSource['data']('precompiled');
+            if (!precompiled) {
+                var templateText = templateSource['text']() || "";
+                // Wrap in "with($whatever.koBindingContext) { ... }"
+                templateText = "{{ko_with $item.koBindingContext}}" + templateText + "{{/ko_with}}";
+
+                precompiled = jQuery['template'](null, templateText);
+                templateSource['data']('precompiled', precompiled);
+            }
+
+            var data = [bindingContext['$data']]; // Prewrap the data in an array to stop jquery.tmpl from trying to unwrap any arrays
+            var jQueryTemplateOptions = jQuery['extend']({ 'koBindingContext': bindingContext }, options['templateOptions']);
+
+            var resultNodes = executeTemplate(precompiled, data, jQueryTemplateOptions);
+            resultNodes['appendTo'](document.createElement("div")); // Using "appendTo" forces jQuery/jQuery.tmpl to perform necessary cleanup work
+
+            jQuery['fragments'] = {}; // Clear jQuery's fragment cache to avoid a memory leak after a large number of template renders
+            return resultNodes;
+        };
+
+        this['createJavaScriptEvaluatorBlock'] = function(script) {
+            return "{{ko_code ((function() { return " + script + " })()) }}";
+        };
+
+        this['addTemplate'] = function(templateName, templateMarkup) {
+            document.write("<script type='text/html' id='" + templateName + "'>" + templateMarkup + "</script>");
+        };
+
+        if (jQueryTmplVersion > 0) {
+            jQuery['tmpl']['tag']['ko_code'] = {
+                open: "__.push($1 || '');"
+            };
+            jQuery['tmpl']['tag']['ko_with'] = {
+                open: "with($1) {",
+                close: "} "
+            };
+        }
+    };
+
+    ko.jqueryTmplTemplateEngine.prototype = new ko.templateEngine();
+
+    // Use this one by default *only if jquery.tmpl is referenced*
+    var jqueryTmplTemplateEngineInstance = new ko.jqueryTmplTemplateEngine();
+    if (jqueryTmplTemplateEngineInstance.jQueryTmplVersion > 0)
+        ko.setTemplateEngine(jqueryTmplTemplateEngineInstance);
+
+    ko.exportSymbol('jqueryTmplTemplateEngine', ko.jqueryTmplTemplateEngine);
+})();
+});
+})(window,document,navigator,window["jQuery"]);
+})();
\ No newline at end of file
diff -r 316fc30638a6 -r 17ca7fe5c486 ko/fx/src/main/resources/org/apidesign/html/kofx/knockout-2.2.1.js
--- a/ko/fx/src/main/resources/org/apidesign/html/kofx/knockout-2.2.1.js	Wed Jun 26 20:03:40 2013 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,3594 +0,0 @@
-// Knockout JavaScript library v2.2.1
-// (c) Steven Sanderson - http://knockoutjs.com/
-// License: MIT (http://www.opensource.org/licenses/mit-license.php)
-
-(function(){
-var DEBUG=true;
-(function(window,document,navigator,jQuery,undefined){
-!function(factory) {
-    // Support three module loading scenarios
-    if (typeof require === 'function' && typeof exports === 'object' && typeof module === 'object') {
-        // [1] CommonJS/Node.js
-        var target = module['exports'] || exports; // module.exports is for Node.js
-        factory(target);
-    } else if (typeof define === 'function' && define['amd']) {
-        // [2] AMD anonymous module
-        define(['exports'], factory);
-    } else {
-        // [3] No module loader (plain <script> tag) - put directly in global namespace
-        factory(window['ko'] = {});
-    }
-}(function(koExports){
-// Internally, all KO objects are attached to koExports (even the non-exported ones whose names will be minified by the closure compiler).
-// In the future, the following "ko" variable may be made distinct from "koExports" so that private objects are not externally reachable.
-var ko = typeof koExports !== 'undefined' ? koExports : {};
-// Google Closure Compiler helpers (used only to make the minified file smaller)
-ko.exportSymbol = function(koPath, object) {
-	var tokens = koPath.split(".");
-
-	// In the future, "ko" may become distinct from "koExports" (so that non-exported objects are not reachable)
-	// At that point, "target" would be set to: (typeof koExports !== "undefined" ? koExports : ko)
-	var target = ko;
-
-	for (var i = 0; i < tokens.length - 1; i++)
-		target = target[tokens[i]];
-	target[tokens[tokens.length - 1]] = object;
-};
-ko.exportProperty = function(owner, publicName, object) {
-  owner[publicName] = object;
-};
-ko.version = "2.2.1";
-
-ko.exportSymbol('version', ko.version);
-ko.utils = new (function () {
-    var stringTrimRegex = /^(\s|\u00A0)+|(\s|\u00A0)+$/g;
-
-    // Represent the known event types in a compact way, then at runtime transform it into a hash with event name as key (for fast lookup)
-    var knownEvents = {}, knownEventTypesByEventName = {};
-    var keyEventTypeName = /Firefox\/2/i.test(navigator.userAgent) ? 'KeyboardEvent' : 'UIEvents';
-    knownEvents[keyEventTypeName] = ['keyup', 'keydown', 'keypress'];
-    knownEvents['MouseEvents'] = ['click', 'dblclick', 'mousedown', 'mouseup', 'mousemove', 'mouseover', 'mouseout', 'mouseenter', 'mouseleave'];
-    for (var eventType in knownEvents) {
-        var knownEventsForType = knownEvents[eventType];
-        if (knownEventsForType.length) {
-            for (var i = 0, j = knownEventsForType.length; i < j; i++)
-                knownEventTypesByEventName[knownEventsForType[i]] = eventType;
-        }
-    }
-    var eventsThatMustBeRegisteredUsingAttachEvent = { 'propertychange': true }; // Workaround for an IE9 issue - https://github.com/SteveSanderson/knockout/issues/406
-
-    // Detect IE versions for bug workarounds (uses IE conditionals, not UA string, for robustness)
-    // Note that, since IE 10 does not support conditional comments, the following logic only detects IE < 10.
-    // Currently this is by design, since IE 10+ behaves correctly when treated as a standard browser.
-    // If there is a future need to detect specific versions of IE10+, we will amend this.
-    var ieVersion = (function() {
-        var version = 3, div = document.createElement('div'), iElems = div.getElementsByTagName('i');
-
-        // Keep constructing conditional HTML blocks until we hit one that resolves to an empty fragment
-        while (
-            div.innerHTML = '<!--[if gt IE ' + (++version) + ']><i></i><![endif]-->',
-            iElems[0]
-        );
-        return version > 4 ? version : undefined;
-    }());
-    var isIe6 = ieVersion === 6,
-        isIe7 = ieVersion === 7;
-
-    function isClickOnCheckableElement(element, eventType) {
-        if ((ko.utils.tagNameLower(element) !== "input") || !element.type) return false;
-        if (eventType.toLowerCase() != "click") return false;
-        var inputType = element.type;
-        return (inputType == "checkbox") || (inputType == "radio");
-    }
-
-    return {
-        fieldsIncludedWithJsonPost: ['authenticity_token', /^__RequestVerificationToken(_.*)?$/],
-
-        arrayForEach: function (array, action) {
-            for (var i = 0, j = array.length; i < j; i++)
-                action(array[i]);
-        },
-
-        arrayIndexOf: function (array, item) {
-            if (typeof Array.prototype.indexOf == "function")
-                return Array.prototype.indexOf.call(array, item);
-            for (var i = 0, j = array.length; i < j; i++)
-                if (array[i] === item)
-                    return i;
-            return -1;
-        },
-
-        arrayFirst: function (array, predicate, predicateOwner) {
-            for (var i = 0, j = array.length; i < j; i++)
-                if (predicate.call(predicateOwner, array[i]))
-                    return array[i];
-            return null;
-        },
-
-        arrayRemoveItem: function (array, itemToRemove) {
-            var index = ko.utils.arrayIndexOf(array, itemToRemove);
-            if (index >= 0)
-                array.splice(index, 1);
-        },
-
-        arrayGetDistinctValues: function (array) {
-            array = array || [];
-            var result = [];
-            for (var i = 0, j = array.length; i < j; i++) {
-                if (ko.utils.arrayIndexOf(result, array[i]) < 0)
-                    result.push(array[i]);
-            }
-            return result;
-        },
-
-        arrayMap: function (array, mapping) {
-            array = array || [];
-            var result = [];
-            for (var i = 0, j = array.length; i < j; i++)
-                result.push(mapping(array[i]));
-            return result;
-        },
-
-        arrayFilter: function (array, predicate) {
-            array = array || [];
-            var result = [];
-            for (var i = 0, j = array.length; i < j; i++)
-                if (predicate(array[i]))
-                    result.push(array[i]);
-            return result;
-        },
-
-        arrayPushAll: function (array, valuesToPush) {
-            if (valuesToPush instanceof Array)
-                array.push.apply(array, valuesToPush);
-            else
-                for (var i = 0, j = valuesToPush.length; i < j; i++)
-                    array.push(valuesToPush[i]);
-            return array;
-        },
-
-        extend: function (target, source) {
-            if (source) {
-                for(var prop in source) {
-                    if(source.hasOwnProperty(prop)) {
-                        target[prop] = source[prop];
-                    }
-                }
-            }
-            return target;
-        },
-
-        emptyDomNode: function (domNode) {
-            while (domNode.firstChild) {
-                ko.removeNode(domNode.firstChild);
-            }
-        },
-
-        moveCleanedNodesToContainerElement: function(nodes) {
-            // Ensure it's a real array, as we're about to reparent the nodes and
-            // we don't want the underlying collection to change while we're doing that.
-            var nodesArray = ko.utils.makeArray(nodes);
-
-            var container = document.createElement('div');
-            for (var i = 0, j = nodesArray.length; i < j; i++) {
-                container.appendChild(ko.cleanNode(nodesArray[i]));
-            }
-            return container;
-        },
-
-        cloneNodes: function (nodesArray, shouldCleanNodes) {
-            for (var i = 0, j = nodesArray.length, newNodesArray = []; i < j; i++) {
-                var clonedNode = nodesArray[i].cloneNode(true);
-                newNodesArray.push(shouldCleanNodes ? ko.cleanNode(clonedNode) : clonedNode);
-            }
-            return newNodesArray;
-        },
-
-        setDomNodeChildren: function (domNode, childNodes) {
-            ko.utils.emptyDomNode(domNode);
-            if (childNodes) {
-                for (var i = 0, j = childNodes.length; i < j; i++)
-                    domNode.appendChild(childNodes[i]);
-            }
-        },
-
-        replaceDomNodes: function (nodeToReplaceOrNodeArray, newNodesArray) {
-            var nodesToReplaceArray = nodeToReplaceOrNodeArray.nodeType ? [nodeToReplaceOrNodeArray] : nodeToReplaceOrNodeArray;
-            if (nodesToReplaceArray.length > 0) {
-                var insertionPoint = nodesToReplaceArray[0];
-                var parent = insertionPoint.parentNode;
-                for (var i = 0, j = newNodesArray.length; i < j; i++)
-                    parent.insertBefore(newNodesArray[i], insertionPoint);
-                for (var i = 0, j = nodesToReplaceArray.length; i < j; i++) {
-                    ko.removeNode(nodesToReplaceArray[i]);
-                }
-            }
-        },
-
-        setOptionNodeSelectionState: function (optionNode, isSelected) {
-            // IE6 sometimes throws "unknown error" if you try to write to .selected directly, whereas Firefox struggles with setAttribute. Pick one based on browser.
-            if (ieVersion < 7)
-                optionNode.setAttribute("selected", isSelected);
-            else
-                optionNode.selected = isSelected;
-        },
-
-        stringTrim: function (string) {
-            return (string || "").replace(stringTrimRegex, "");
-        },
-
-        stringTokenize: function (string, delimiter) {
-            var result = [];
-            var tokens = (string || "").split(delimiter);
-            for (var i = 0, j = tokens.length; i < j; i++) {
-                var trimmed = ko.utils.stringTrim(tokens[i]);
-                if (trimmed !== "")
-                    result.push(trimmed);
-            }
-            return result;
-        },
-
-        stringStartsWith: function (string, startsWith) {
-            string = string || "";
-            if (startsWith.length > string.length)
-                return false;
-            return string.substring(0, startsWith.length) === startsWith;
-        },
-
-        domNodeIsContainedBy: function (node, containedByNode) {
-            if (containedByNode.compareDocumentPosition)
-                return (containedByNode.compareDocumentPosition(node) & 16) == 16;
-            while (node != null) {
-                if (node == containedByNode)
-                    return true;
-                node = node.parentNode;
-            }
-            return false;
-        },
-
-        domNodeIsAttachedToDocument: function (node) {
-            return ko.utils.domNodeIsContainedBy(node, node.ownerDocument);
-        },
-
-        tagNameLower: function(element) {
-            // For HTML elements, tagName will always be upper case; for XHTML elements, it'll be lower case.
-            // Possible future optimization: If we know it's an element from an XHTML document (not HTML),
-            // we don't need to do the .toLowerCase() as it will always be lower case anyway.
-            return element && element.tagName && element.tagName.toLowerCase();
-        },
-
-        registerEventHandler: function (element, eventType, handler) {
-            var mustUseAttachEvent = ieVersion && eventsThatMustBeRegisteredUsingAttachEvent[eventType];
-            if (!mustUseAttachEvent && typeof jQuery != "undefined") {
-                if (isClickOnCheckableElement(element, eventType)) {
-                    // For click events on checkboxes, jQuery interferes with the event handling in an awkward way:
-                    // it toggles the element checked state *after* the click event handlers run, whereas native
-                    // click events toggle the checked state *before* the event handler.
-                    // Fix this by intecepting the handler and applying the correct checkedness before it runs.
-                    var originalHandler = handler;
-                    handler = function(event, eventData) {
-                        var jQuerySuppliedCheckedState = this.checked;
-                        if (eventData)
-                            this.checked = eventData.checkedStateBeforeEvent !== true;
-                        originalHandler.call(this, event);
-                        this.checked = jQuerySuppliedCheckedState; // Restore the state jQuery applied
-                    };
-                }
-                jQuery(element)['bind'](eventType, handler);
-            } else if (!mustUseAttachEvent && typeof element.addEventListener == "function")
-                element.addEventListener(eventType, handler, false);
-            else if (typeof element.attachEvent != "undefined")
-                element.attachEvent("on" + eventType, function (event) {
-                    handler.call(element, event);
-                });
-            else
-                throw new Error("Browser doesn't support addEventListener or attachEvent");
-        },
-
-        triggerEvent: function (element, eventType) {
-            if (!(element && element.nodeType))
-                throw new Error("element must be a DOM node when calling triggerEvent");
-
-            if (typeof jQuery != "undefined") {
-                var eventData = [];
-                if (isClickOnCheckableElement(element, eventType)) {
-                    // Work around the jQuery "click events on checkboxes" issue described above by storing the original checked state before triggering the handler
-                    eventData.push({ checkedStateBeforeEvent: element.checked });
-                }
-                jQuery(element)['trigger'](eventType, eventData);
-            } else if (typeof document.createEvent == "function") {
-                if (typeof element.dispatchEvent == "function") {
-                    var eventCategory = knownEventTypesByEventName[eventType] || "HTMLEvents";
-                    var event = document.createEvent(eventCategory);
-                    event.initEvent(eventType, true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, element);
-                    element.dispatchEvent(event);
-                }
-                else
-                    throw new Error("The supplied element doesn't support dispatchEvent");
-            } else if (typeof element.fireEvent != "undefined") {
-                // Unlike other browsers, IE doesn't change the checked state of checkboxes/radiobuttons when you trigger their "click" event
-                // so to make it consistent, we'll do it manually here
-                if (isClickOnCheckableElement(element, eventType))
-                    element.checked = element.checked !== true;
-                element.fireEvent("on" + eventType);
-            }
-            else
-                throw new Error("Browser doesn't support triggering events");
-        },
-
-        unwrapObservable: function (value) {
-            return ko.isObservable(value) ? value() : value;
-        },
-
-        peekObservable: function (value) {
-            return ko.isObservable(value) ? value.peek() : value;
-        },
-
-        toggleDomNodeCssClass: function (node, classNames, shouldHaveClass) {
-            if (classNames) {
-                var cssClassNameRegex = /[\w-]+/g,
-                    currentClassNames = node.className.match(cssClassNameRegex) || [];
-                ko.utils.arrayForEach(classNames.match(cssClassNameRegex), function(className) {
-                    var indexOfClass = ko.utils.arrayIndexOf(currentClassNames, className);
-                    if (indexOfClass >= 0) {
-                        if (!shouldHaveClass)
-                            currentClassNames.splice(indexOfClass, 1);
-                    } else {
-                        if (shouldHaveClass)
-                            currentClassNames.push(className);
-                    }
-                });
-                node.className = currentClassNames.join(" ");
-            }
-        },
-
-        setTextContent: function(element, textContent) {
-            var value = ko.utils.unwrapObservable(textContent);
-            if ((value === null) || (value === undefined))
-                value = "";
-
-            if (element.nodeType === 3) {
-                element.data = value;
-            } else {
-                // We need there to be exactly one child: a text node.
-                // If there are no children, more than one, or if it's not a text node,
-                // we'll clear everything and create a single text node.
-                var innerTextNode = ko.virtualElements.firstChild(element);
-                if (!innerTextNode || innerTextNode.nodeType != 3 || ko.virtualElements.nextSibling(innerTextNode)) {
-                    ko.virtualElements.setDomNodeChildren(element, [document.createTextNode(value)]);
-                } else {
-                    innerTextNode.data = value;
-                }
-
-                ko.utils.forceRefresh(element);
-            }
-        },
-
-        setElementName: function(element, name) {
-            element.name = name;
-
-            // Workaround IE 6/7 issue
-            // - https://github.com/SteveSanderson/knockout/issues/197
-            // - http://www.matts411.com/post/setting_the_name_attribute_in_ie_dom/
-            if (ieVersion <= 7) {
-                try {
-                    element.mergeAttributes(document.createElement("<input name='" + element.name + "'/>"), false);
-                }
-                catch(e) {} // For IE9 with doc mode "IE9 Standards" and browser mode "IE9 Compatibility View"
-            }
-        },
-
-        forceRefresh: function(node) {
-            // Workaround for an IE9 rendering bug - https://github.com/SteveSanderson/knockout/issues/209
-            if (ieVersion >= 9) {
-                // For text nodes and comment nodes (most likely virtual elements), we will have to refresh the container
-                var elem = node.nodeType == 1 ? node : node.parentNode;
-                if (elem.style)
-                    elem.style.zoom = elem.style.zoom;
-            }
-        },
-
-        ensureSelectElementIsRenderedCorrectly: function(selectElement) {
-            // Workaround for IE9 rendering bug - it doesn't reliably display all the text in dynamically-added select boxes unless you force it to re-render by updating the width.
-            // (See https://github.com/SteveSanderson/knockout/issues/312, http://stackoverflow.com/questions/5908494/select-only-shows-first-char-of-selected-option)
-            if (ieVersion >= 9) {
-                var originalWidth = selectElement.style.width;
-                selectElement.style.width = 0;
-                selectElement.style.width = originalWidth;
-            }
-        },
-
-        range: function (min, max) {
-            min = ko.utils.unwrapObservable(min);
-            max = ko.utils.unwrapObservable(max);
-            var result = [];
-            for (var i = min; i <= max; i++)
-                result.push(i);
-            return result;
-        },
-
-        makeArray: function(arrayLikeObject) {
-            var result = [];
-            for (var i = 0, j = arrayLikeObject.length; i < j; i++) {
-                result.push(arrayLikeObject[i]);
-            };
-            return result;
-        },
-
-        isIe6 : isIe6,
-        isIe7 : isIe7,
-        ieVersion : ieVersion,
-
-        getFormFields: function(form, fieldName) {
-            var fields = ko.utils.makeArray(form.getElementsByTagName("input")).concat(ko.utils.makeArray(form.getElementsByTagName("textarea")));
-            var isMatchingField = (typeof fieldName == 'string')
-                ? function(field) { return field.name === fieldName }
-                : function(field) { return fieldName.test(field.name) }; // Treat fieldName as regex or object containing predicate
-            var matches = [];
-            for (var i = fields.length - 1; i >= 0; i--) {
-                if (isMatchingField(fields[i]))
-                    matches.push(fields[i]);
-            };
-            return matches;
-        },
-
-        parseJson: function (jsonString) {
-            if (typeof jsonString == "string") {
-                jsonString = ko.utils.stringTrim(jsonString);
-                if (jsonString) {
-                    if (window.JSON && window.JSON.parse) // Use native parsing where available
-                        return window.JSON.parse(jsonString);
-                    return (new Function("return " + jsonString))(); // Fallback on less safe parsing for older browsers
-                }
-            }
-            return null;
-        },
-
-        stringifyJson: function (data, replacer, space) {   // replacer and space are optional
-            if ((typeof JSON == "undefined") || (typeof JSON.stringify == "undefined"))
-                throw new Error("Cannot find JSON.stringify(). Some browsers (e.g., IE < 8) don't support it natively, but you can overcome this by adding a script reference to json2.js, downloadable from http://www.json.org/json2.js");
-            return JSON.stringify(ko.utils.unwrapObservable(data), replacer, space);
-        },
-
-        postJson: function (urlOrForm, data, options) {
-            options = options || {};
-            var params = options['params'] || {};
-            var includeFields = options['includeFields'] || this.fieldsIncludedWithJsonPost;
-            var url = urlOrForm;
-
-            // If we were given a form, use its 'action' URL and pick out any requested field values
-            if((typeof urlOrForm == 'object') && (ko.utils.tagNameLower(urlOrForm) === "form")) {
-                var originalForm = urlOrForm;
-                url = originalForm.action;
-                for (var i = includeFields.length - 1; i >= 0; i--) {
-                    var fields = ko.utils.getFormFields(originalForm, includeFields[i]);
-                    for (var j = fields.length - 1; j >= 0; j--)
-                        params[fields[j].name] = fields[j].value;
-                }
-            }
-
-            data = ko.utils.unwrapObservable(data);
-            var form = document.createElement("form");
-            form.style.display = "none";
-            form.action = url;
-            form.method = "post";
-            for (var key in data) {
-                var input = document.createElement("input");
-                input.name = key;
-                input.value = ko.utils.stringifyJson(ko.utils.unwrapObservable(data[key]));
-                form.appendChild(input);
-            }
-            for (var key in params) {
-                var input = document.createElement("input");
-                input.name = key;
-                input.value = params[key];
-                form.appendChild(input);
-            }
-            document.body.appendChild(form);
-            options['submitter'] ? options['submitter'](form) : form.submit();
-            setTimeout(function () { form.parentNode.removeChild(form); }, 0);
-        }
-    }
-})();
-
-ko.exportSymbol('utils', ko.utils);
-ko.exportSymbol('utils.arrayForEach', ko.utils.arrayForEach);
-ko.exportSymbol('utils.arrayFirst', ko.utils.arrayFirst);
-ko.exportSymbol('utils.arrayFilter', ko.utils.arrayFilter);
-ko.exportSymbol('utils.arrayGetDistinctValues', ko.utils.arrayGetDistinctValues);
-ko.exportSymbol('utils.arrayIndexOf', ko.utils.arrayIndexOf);
-ko.exportSymbol('utils.arrayMap', ko.utils.arrayMap);
-ko.exportSymbol('utils.arrayPushAll', ko.utils.arrayPushAll);
-ko.exportSymbol('utils.arrayRemoveItem', ko.utils.arrayRemoveItem);
-ko.exportSymbol('utils.extend', ko.utils.extend);
-ko.exportSymbol('utils.fieldsIncludedWithJsonPost', ko.utils.fieldsIncludedWithJsonPost);
-ko.exportSymbol('utils.getFormFields', ko.utils.getFormFields);
-ko.exportSymbol('utils.peekObservable', ko.utils.peekObservable);
-ko.exportSymbol('utils.postJson', ko.utils.postJson);
-ko.exportSymbol('utils.parseJson', ko.utils.parseJson);
-ko.exportSymbol('utils.registerEventHandler', ko.utils.registerEventHandler);
-ko.exportSymbol('utils.stringifyJson', ko.utils.stringifyJson);
-ko.exportSymbol('utils.range', ko.utils.range);
-ko.exportSymbol('utils.toggleDomNodeCssClass', ko.utils.toggleDomNodeCssClass);
-ko.exportSymbol('utils.triggerEvent', ko.utils.triggerEvent);
-ko.exportSymbol('utils.unwrapObservable', ko.utils.unwrapObservable);
-
-if (!Function.prototype['bind']) {
-    // Function.prototype.bind is a standard part of ECMAScript 5th Edition (December 2009, http://www.ecma-international.org/publications/files/ECMA-ST/ECMA-262.pdf)
-    // In case the browser doesn't implement it natively, provide a JavaScript implementation. This implementation is based on the one in prototype.js
-    Function.prototype['bind'] = function (object) {
-        var originalFunction = this, args = Array.prototype.slice.call(arguments), object = args.shift();
-        return function () {
-            return originalFunction.apply(object, args.concat(Array.prototype.slice.call(arguments)));
-        };
-    };
-}
-
-ko.utils.domData = new (function () {
-    var uniqueId = 0;
-    var dataStoreKeyExpandoPropertyName = "__ko__" + (new Date).getTime();
-    var dataStore = {};
-    return {
-        get: function (node, key) {
-            var allDataForNode = ko.utils.domData.getAll(node, false);
-            return allDataForNode === undefined ? undefined : allDataForNode[key];
-        },
-        set: function (node, key, value) {
-            if (value === undefined) {
-                // Make sure we don't actually create a new domData key if we are actually deleting a value
-                if (ko.utils.domData.getAll(node, false) === undefined)
-                    return;
-            }
-            var allDataForNode = ko.utils.domData.getAll(node, true);
-            allDataForNode[key] = value;
-        },
-        getAll: function (node, createIfNotFound) {
-            var dataStoreKey = node[dataStoreKeyExpandoPropertyName];
-            var hasExistingDataStore = dataStoreKey && (dataStoreKey !== "null") && dataStore[dataStoreKey];
-            if (!hasExistingDataStore) {
-                if (!createIfNotFound)
-                    return undefined;
-                dataStoreKey = node[dataStoreKeyExpandoPropertyName] = "ko" + uniqueId++;
-                dataStore[dataStoreKey] = {};
-            }
-            return dataStore[dataStoreKey];
-        },
-        clear: function (node) {
-            var dataStoreKey = node[dataStoreKeyExpandoPropertyName];
-            if (dataStoreKey) {
-                delete dataStore[dataStoreKey];
-                node[dataStoreKeyExpandoPropertyName] = null;
-                return true; // Exposing "did clean" flag purely so specs can infer whether things have been cleaned up as intended
-            }
-            return false;
-        }
-    }
-})();
-
-ko.exportSymbol('utils.domData', ko.utils.domData);
-ko.exportSymbol('utils.domData.clear', ko.utils.domData.clear); // Exporting only so specs can clear up after themselves fully
-
-ko.utils.domNodeDisposal = new (function () {
-    var domDataKey = "__ko_domNodeDisposal__" + (new Date).getTime();
-    var cleanableNodeTypes = { 1: true, 8: true, 9: true };       // Element, Comment, Document
-    var cleanableNodeTypesWithDescendants = { 1: true, 9: true }; // Element, Document
-
-    function getDisposeCallbacksCollection(node, createIfNotFound) {
-        var allDisposeCallbacks = ko.utils.domData.get(node, domDataKey);
-        if ((allDisposeCallbacks === undefined) && createIfNotFound) {
-            allDisposeCallbacks = [];
-            ko.utils.domData.set(node, domDataKey, allDisposeCallbacks);
-        }
-        return allDisposeCallbacks;
-    }
-    function destroyCallbacksCollection(node) {
-        ko.utils.domData.set(node, domDataKey, undefined);
-    }
-
-    function cleanSingleNode(node) {
-        // Run all the dispose callbacks
-        var callbacks = getDisposeCallbacksCollection(node, false);
-        if (callbacks) {
-            callbacks = callbacks.slice(0); // Clone, as the array may be modified during iteration (typically, callbacks will remove themselves)
-            for (var i = 0; i < callbacks.length; i++)
-                callbacks[i](node);
-        }
-
-        // Also erase the DOM data
-        ko.utils.domData.clear(node);
-
-        // Special support for jQuery here because it's so commonly used.
-        // Many jQuery plugins (including jquery.tmpl) store data using jQuery's equivalent of domData
-        // so notify it to tear down any resources associated with the node & descendants here.
-        if ((typeof jQuery == "function") && (typeof jQuery['cleanData'] == "function"))
-            jQuery['cleanData']([node]);
-
-        // Also clear any immediate-child comment nodes, as these wouldn't have been found by
-        // node.getElementsByTagName("*") in cleanNode() (comment nodes aren't elements)
-        if (cleanableNodeTypesWithDescendants[node.nodeType])
-            cleanImmediateCommentTypeChildren(node);
-    }
-
-    function cleanImmediateCommentTypeChildren(nodeWithChildren) {
-        var child, nextChild = nodeWithChildren.firstChild;
-        while (child = nextChild) {
-            nextChild = child.nextSibling;
-            if (child.nodeType === 8)
-                cleanSingleNode(child);
-        }
-    }
-
-    return {
-        addDisposeCallback : function(node, callback) {
-            if (typeof callback != "function")
-                throw new Error("Callback must be a function");
-            getDisposeCallbacksCollection(node, true).push(callback);
-        },
-
-        removeDisposeCallback : function(node, callback) {
-            var callbacksCollection = getDisposeCallbacksCollection(node, false);
-            if (callbacksCollection) {
-                ko.utils.arrayRemoveItem(callbacksCollection, callback);
-                if (callbacksCollection.length == 0)
-                    destroyCallbacksCollection(node);
-            }
-        },
-
-        cleanNode : function(node) {
-            // First clean this node, where applicable
-            if (cleanableNodeTypes[node.nodeType]) {
-                cleanSingleNode(node);
-
-                // ... then its descendants, where applicable
-                if (cleanableNodeTypesWithDescendants[node.nodeType]) {
-                    // Clone the descendants list in case it changes during iteration
-                    var descendants = [];
-                    ko.utils.arrayPushAll(descendants, node.getElementsByTagName("*"));
-                    for (var i = 0, j = descendants.length; i < j; i++)
-                        cleanSingleNode(descendants[i]);
-                }
-            }
-            return node;
-        },
-
-        removeNode : function(node) {
-            ko.cleanNode(node);
-            if (node.parentNode)
-                node.parentNode.removeChild(node);
-        }
-    }
-})();
-ko.cleanNode = ko.utils.domNodeDisposal.cleanNode; // Shorthand name for convenience
-ko.removeNode = ko.utils.domNodeDisposal.removeNode; // Shorthand name for convenience
-ko.exportSymbol('cleanNode', ko.cleanNode);
-ko.exportSymbol('removeNode', ko.removeNode);
-ko.exportSymbol('utils.domNodeDisposal', ko.utils.domNodeDisposal);
-ko.exportSymbol('utils.domNodeDisposal.addDisposeCallback', ko.utils.domNodeDisposal.addDisposeCallback);
-ko.exportSymbol('utils.domNodeDisposal.removeDisposeCallback', ko.utils.domNodeDisposal.removeDisposeCallback);
-(function () {
-    var leadingCommentRegex = /^(\s*)<!--(.*?)-->/;
-
-    function simpleHtmlParse(html) {
-        // Based on jQuery's "clean" function, but only accounting for table-related elements.
-        // If you have referenced jQuery, this won't be used anyway - KO will use jQuery's "clean" function directly
-
-        // Note that there's still an issue in IE < 9 whereby it will discard comment nodes that are the first child of
-        // a descendant node. For example: "<div><!-- mycomment -->abc</div>" will get parsed as "<div>abc</div>"
-        // This won't affect anyone who has referenced jQuery, and there's always the workaround of inserting a dummy node
-        // (possibly a text node) in front of the comment. So, KO does not attempt to workaround this IE issue automatically at present.
-
-        // Trim whitespace, otherwise indexOf won't work as expected
-        var tags = ko.utils.stringTrim(html).toLowerCase(), div = document.createElement("div");
-
-        // Finds the first match from the left column, and returns the corresponding "wrap" data from the right column
-        var wrap = tags.match(/^<(thead|tbody|tfoot)/)              && [1, "<table>", "</table>"] ||
-                   !tags.indexOf("<tr")                             && [2, "<table><tbody>", "</tbody></table>"] ||
-                   (!tags.indexOf("<td") || !tags.indexOf("<th"))   && [3, "<table><tbody><tr>", "</tr></tbody></table>"] ||
-                   /* anything else */                                 [0, "", ""];
-
-        // Go to html and back, then peel off extra wrappers
-        // Note that we always prefix with some dummy text, because otherwise, IE<9 will strip out leading comment nodes in descendants. Total madness.
-        var markup = "ignored<div>" + wrap[1] + html + wrap[2] + "</div>";
-        if (typeof window['innerShiv'] == "function") {
-            div.appendChild(window['innerShiv'](markup));
-        } else {
-            div.innerHTML = markup;
-        }
-
-        // Move to the right depth
-        while (wrap[0]--)
-            div = div.lastChild;
-
-        return ko.utils.makeArray(div.lastChild.childNodes);
-    }
-
-    function jQueryHtmlParse(html) {
-        // jQuery's "parseHTML" function was introduced in jQuery 1.8.0 and is a documented public API.
-        if (jQuery['parseHTML']) {
-            return jQuery['parseHTML'](html);
-        } else {
-            // For jQuery < 1.8.0, we fall back on the undocumented internal "clean" function.
-            var elems = jQuery['clean']([html]);
-
-            // As of jQuery 1.7.1, jQuery parses the HTML by appending it to some dummy parent nodes held in an in-memory document fragment.
-            // Unfortunately, it never clears the dummy parent nodes from the document fragment, so it leaks memory over time.
-            // Fix this by finding the top-most dummy parent element, and detaching it from its owner fragment.
-            if (elems && elems[0]) {
-                // Find the top-most parent element that's a direct child of a document fragment
-                var elem = elems[0];
-                while (elem.parentNode && elem.parentNode.nodeType !== 11 /* i.e., DocumentFragment */)
-                    elem = elem.parentNode;
-                // ... then detach it
-                if (elem.parentNode)
-                    elem.parentNode.removeChild(elem);
-            }
-
-            return elems;
-        }
-    }
-
-    ko.utils.parseHtmlFragment = function(html) {
-        return typeof jQuery != 'undefined' ? jQueryHtmlParse(html)   // As below, benefit from jQuery's optimisations where possible
-                                            : simpleHtmlParse(html);  // ... otherwise, this simple logic will do in most common cases.
-    };
-
-    ko.utils.setHtml = function(node, html) {
-        ko.utils.emptyDomNode(node);
-
-        // There's no legitimate reason to display a stringified observable without unwrapping it, so we'll unwrap it
-        html = ko.utils.unwrapObservable(html);
-
-        if ((html !== null) && (html !== undefined)) {
-            if (typeof html != 'string')
-                html = html.toString();
-
-            // jQuery contains a lot of sophisticated code to parse arbitrary HTML fragments,
-            // for example <tr> elements which are not normally allowed to exist on their own.
-            // If you've referenced jQuery we'll use that rather than duplicating its code.
-            if (typeof jQuery != 'undefined') {
-                jQuery(node)['html'](html);
-            } else {
-                // ... otherwise, use KO's own parsing logic.
-                var parsedNodes = ko.utils.parseHtmlFragment(html);
-                for (var i = 0; i < parsedNodes.length; i++)
-                    node.appendChild(parsedNodes[i]);
-            }
-        }
-    };
-})();
-
-ko.exportSymbol('utils.parseHtmlFragment', ko.utils.parseHtmlFragment);
-ko.exportSymbol('utils.setHtml', ko.utils.setHtml);
-
-ko.memoization = (function () {
-    var memos = {};
-
-    function randomMax8HexChars() {
-        return (((1 + Math.random()) * 0x100000000) | 0).toString(16).substring(1);
-    }
-    function generateRandomId() {
-        return randomMax8HexChars() + randomMax8HexChars();
-    }
-    function findMemoNodes(rootNode, appendToArray) {
-        if (!rootNode)
-            return;
-        if (rootNode.nodeType == 8) {
-            var memoId = ko.memoization.parseMemoText(rootNode.nodeValue);
-            if (memoId != null)
-                appendToArray.push({ domNode: rootNode, memoId: memoId });
-        } else if (rootNode.nodeType == 1) {
-            for (var i = 0, childNodes = rootNode.childNodes, j = childNodes.length; i < j; i++)
-                findMemoNodes(childNodes[i], appendToArray);
-        }
-    }
-
-    return {
-        memoize: function (callback) {
-            if (typeof callback != "function")
-                throw new Error("You can only pass a function to ko.memoization.memoize()");
-            var memoId = generateRandomId();
-            memos[memoId] = callback;
-            return "<!--[ko_memo:" + memoId + "]-->";
-        },
-
-        unmemoize: function (memoId, callbackParams) {
-            var callback = memos[memoId];
-            if (callback === undefined)
-                throw new Error("Couldn't find any memo with ID " + memoId + ". Perhaps it's already been unmemoized.");
-            try {
-                callback.apply(null, callbackParams || []);
-                return true;
-            }
-            finally { delete memos[memoId]; }
-        },
-
-        unmemoizeDomNodeAndDescendants: function (domNode, extraCallbackParamsArray) {
-            var memos = [];
-            findMemoNodes(domNode, memos);
-            for (var i = 0, j = memos.length; i < j; i++) {
-                var node = memos[i].domNode;
-                var combinedParams = [node];
-                if (extraCallbackParamsArray)
-                    ko.utils.arrayPushAll(combinedParams, extraCallbackParamsArray);
-                ko.memoization.unmemoize(memos[i].memoId, combinedParams);
-                node.nodeValue = ""; // Neuter this node so we don't try to unmemoize it again
-                if (node.parentNode)
-                    node.parentNode.removeChild(node); // If possible, erase it totally (not always possible - someone else might just hold a reference to it then call unmemoizeDomNodeAndDescendants again)
-            }
-        },
-
-        parseMemoText: function (memoText) {
-            var match = memoText.match(/^\[ko_memo\:(.*?)\]$/);
-            return match ? match[1] : null;
-        }
-    };
-})();
-
-ko.exportSymbol('memoization', ko.memoization);
-ko.exportSymbol('memoization.memoize', ko.memoization.memoize);
-ko.exportSymbol('memoization.unmemoize', ko.memoization.unmemoize);
-ko.exportSymbol('memoization.parseMemoText', ko.memoization.parseMemoText);
-ko.exportSymbol('memoization.unmemoizeDomNodeAndDescendants', ko.memoization.unmemoizeDomNodeAndDescendants);
-ko.extenders = {
-    'throttle': function(target, timeout) {
-        // Throttling means two things:
-
-        // (1) For dependent observables, we throttle *evaluations* so that, no matter how fast its dependencies
-        //     notify updates, the target doesn't re-evaluate (and hence doesn't notify) faster than a certain rate
-        target['throttleEvaluation'] = timeout;
-
-        // (2) For writable targets (observables, or writable dependent observables), we throttle *writes*
-        //     so the target cannot change value synchronously or faster than a certain rate
-        var writeTimeoutInstance = null;
-        return ko.dependentObservable({
-            'read': target,
-            'write': function(value) {
-                clearTimeout(writeTimeoutInstance);
-                writeTimeoutInstance = setTimeout(function() {
-                    target(value);
-                }, timeout);
-            }
-        });
-    },
-
-    'notify': function(target, notifyWhen) {
-        target["equalityComparer"] = notifyWhen == "always"
-            ? function() { return false } // Treat all values as not equal
-            : ko.observable["fn"]["equalityComparer"];
-        return target;
-    }
-};
-
-function applyExtenders(requestedExtenders) {
-    var target = this;
-    if (requestedExtenders) {
-        for (var key in requestedExtenders) {
-            var extenderHandler = ko.extenders[key];
-            if (typeof extenderHandler == 'function') {
-                target = extenderHandler(target, requestedExtenders[key]);
-            }
-        }
-    }
-    return target;
-}
-
-ko.exportSymbol('extenders', ko.extenders);
-
-ko.subscription = function (target, callback, disposeCallback) {
-    this.target = target;
-    this.callback = callback;
-    this.disposeCallback = disposeCallback;
-    ko.exportProperty(this, 'dispose', this.dispose);
-};
-ko.subscription.prototype.dispose = function () {
-    this.isDisposed = true;
-    this.disposeCallback();
-};
-
-ko.subscribable = function () {
-    this._subscriptions = {};
-
-    ko.utils.extend(this, ko.subscribable['fn']);
-    ko.exportProperty(this, 'subscribe', this.subscribe);
-    ko.exportProperty(this, 'extend', this.extend);
-    ko.exportProperty(this, 'getSubscriptionsCount', this.getSubscriptionsCount);
-}
-
-var defaultEvent = "change";
-
-ko.subscribable['fn'] = {
-    subscribe: function (callback, callbackTarget, event) {
-        event = event || defaultEvent;
-        var boundCallback = callbackTarget ? callback.bind(callbackTarget) : callback;
-
-        var subscription = new ko.subscription(this, boundCallback, function () {
-            ko.utils.arrayRemoveItem(this._subscriptions[event], subscription);
-        }.bind(this));
-
-        if (!this._subscriptions[event])
-            this._subscriptions[event] = [];
-        this._subscriptions[event].push(subscription);
-        return subscription;
-    },
-
-    "notifySubscribers": function (valueToNotify, event) {
-        event = event || defaultEvent;
-        if (this._subscriptions[event]) {
-            ko.dependencyDetection.ignore(function() {
-                ko.utils.arrayForEach(this._subscriptions[event].slice(0), function (subscription) {
-                    // In case a subscription was disposed during the arrayForEach cycle, check
-                    // for isDisposed on each subscription before invoking its callback
-                    if (subscription && (subscription.isDisposed !== true))
-                        subscription.callback(valueToNotify);
-                });
-            }, this);
-        }
-    },
-
-    getSubscriptionsCount: function () {
-        var total = 0;
-        for (var eventName in this._subscriptions) {
-            if (this._subscriptions.hasOwnProperty(eventName))
-                total += this._subscriptions[eventName].length;
-        }
-        return total;
-    },
-
-    extend: applyExtenders
-};
-
-
-ko.isSubscribable = function (instance) {
-    return typeof instance.subscribe == "function" && typeof instance["notifySubscribers"] == "function";
-};
-
-ko.exportSymbol('subscribable', ko.subscribable);
-ko.exportSymbol('isSubscribable', ko.isSubscribable);
-
-ko.dependencyDetection = (function () {
-    var _frames = [];
-
-    return {
-        begin: function (callback) {
-            _frames.push({ callback: callback, distinctDependencies:[] });
-        },
-
-        end: function () {
-            _frames.pop();
-        },
-
-        registerDependency: function (subscribable) {
-            if (!ko.isSubscribable(subscribable))
-                throw new Error("Only subscribable things can act as dependencies");
-            if (_frames.length > 0) {
-                var topFrame = _frames[_frames.length - 1];
-                if (!topFrame || ko.utils.arrayIndexOf(topFrame.distinctDependencies, subscribable) >= 0)
-                    return;
-                topFrame.distinctDependencies.push(subscribable);
-                topFrame.callback(subscribable);
-            }
-        },
-
-        ignore: function(callback, callbackTarget, callbackArgs) {
-            try {
-                _frames.push(null);
-                return callback.apply(callbackTarget, callbackArgs || []);
-            } finally {
-                _frames.pop();
-            }
-        }
-    };
-})();
-var primitiveTypes = { 'undefined':true, 'boolean':true, 'number':true, 'string':true };
-
-ko.observable = function (initialValue) {
-    var _latestValue = initialValue;
-
-    function observable() {
-        if (arguments.length > 0) {
-            // Write
-
-            // Ignore writes if the value hasn't changed
-            if ((!observable['equalityComparer']) || !observable['equalityComparer'](_latestValue, arguments[0])) {
-                observable.valueWillMutate();
-                _latestValue = arguments[0];
-                if (DEBUG) observable._latestValue = _latestValue;
-                observable.valueHasMutated();
-            }
-            return this; // Permits chained assignments
-        }
-        else {
-            // Read
-            ko.dependencyDetection.registerDependency(observable); // The caller only needs to be notified of changes if they did a "read" operation
-            return _latestValue;
-        }
-    }
-    if (DEBUG) observable._latestValue = _latestValue;
-    ko.subscribable.call(observable);
-    observable.peek = function() { return _latestValue };
-    observable.valueHasMutated = function () { observable["notifySubscribers"](_latestValue); }
-    observable.valueWillMutate = function () { observable["notifySubscribers"](_latestValue, "beforeChange"); }
-    ko.utils.extend(observable, ko.observable['fn']);
-
-    ko.exportProperty(observable, 'peek', observable.peek);
-    ko.exportProperty(observable, "valueHasMutated", observable.valueHasMutated);
-    ko.exportProperty(observable, "valueWillMutate", observable.valueWillMutate);
-
-    return observable;
-}
-
-ko.observable['fn'] = {
-    "equalityComparer": function valuesArePrimitiveAndEqual(a, b) {
-        var oldValueIsPrimitive = (a === null) || (typeof(a) in primitiveTypes);
-        return oldValueIsPrimitive ? (a === b) : false;
-    }
-};
-
-var protoProperty = ko.observable.protoProperty = "__ko_proto__";
-ko.observable['fn'][protoProperty] = ko.observable;
-
-ko.hasPrototype = function(instance, prototype) {
-    if ((instance === null) || (instance === undefined) || (instance[protoProperty] === undefined)) return false;
-    if (instance[protoProperty] === prototype) return true;
-    return ko.hasPrototype(instance[protoProperty], prototype); // Walk the prototype chain
-};
-
-ko.isObservable = function (instance) {
-    return ko.hasPrototype(instance, ko.observable);
-}
-ko.isWriteableObservable = function (instance) {
-    // Observable
-    if ((typeof instance == "function") && instance[protoProperty] === ko.observable)
-        return true;
-    // Writeable dependent observable
-    if ((typeof instance == "function") && (instance[protoProperty] === ko.dependentObservable) && (instance.hasWriteFunction))
-        return true;
-    // Anything else
-    return false;
-}
-
-
-ko.exportSymbol('observable', ko.observable);
-ko.exportSymbol('isObservable', ko.isObservable);
-ko.exportSymbol('isWriteableObservable', ko.isWriteableObservable);
-ko.observableArray = function (initialValues) {
-    if (arguments.length == 0) {
-        // Zero-parameter constructor initializes to empty array
-        initialValues = [];
-    }
-    if ((initialValues !== null) && (initialValues !== undefined) && !('length' in initialValues))
-        throw new Error("The argument passed when initializing an observable array must be an array, or null, or undefined.");
-
-    var result = ko.observable(initialValues);
-    ko.utils.extend(result, ko.observableArray['fn']);
-    return result;
-}
-
-ko.observableArray['fn'] = {
-    'remove': function (valueOrPredicate) {
-        var underlyingArray = this.peek();
-        var removedValues = [];
-        var predicate = typeof valueOrPredicate == "function" ? valueOrPredicate : function (value) { return value === valueOrPredicate; };
-        for (var i = 0; i < underlyingArray.length; i++) {
-            var value = underlyingArray[i];
-            if (predicate(value)) {
-                if (removedValues.length === 0) {
-                    this.valueWillMutate();
-                }
-                removedValues.push(value);
-                underlyingArray.splice(i, 1);
-                i--;
-            }
-        }
-        if (removedValues.length) {
-            this.valueHasMutated();
-        }
-        return removedValues;
-    },
-
-    'removeAll': function (arrayOfValues) {
-        // If you passed zero args, we remove everything
-        if (arrayOfValues === undefined) {
-            var underlyingArray = this.peek();
-            var allValues = underlyingArray.slice(0);
-            this.valueWillMutate();
-            underlyingArray.splice(0, underlyingArray.length);
-            this.valueHasMutated();
-            return allValues;
-        }
-        // If you passed an arg, we interpret it as an array of entries to remove
-        if (!arrayOfValues)
-            return [];
-        return this['remove'](function (value) {
-            return ko.utils.arrayIndexOf(arrayOfValues, value) >= 0;
-        });
-    },
-
-    'destroy': function (valueOrPredicate) {
-        var underlyingArray = this.peek();
-        var predicate = typeof valueOrPredicate == "function" ? valueOrPredicate : function (value) { return value === valueOrPredicate; };
-        this.valueWillMutate();
-        for (var i = underlyingArray.length - 1; i >= 0; i--) {
-            var value = underlyingArray[i];
-            if (predicate(value))
-                underlyingArray[i]["_destroy"] = true;
-        }
-        this.valueHasMutated();
-    },
-
-    'destroyAll': function (arrayOfValues) {
-        // If you passed zero args, we destroy everything
-        if (arrayOfValues === undefined)
-            return this['destroy'](function() { return true });
-
-        // If you passed an arg, we interpret it as an array of entries to destroy
-        if (!arrayOfValues)
-            return [];
-        return this['destroy'](function (value) {
-            return ko.utils.arrayIndexOf(arrayOfValues, value) >= 0;
-        });
-    },
-
-    'indexOf': function (item) {
-        var underlyingArray = this();
-        return ko.utils.arrayIndexOf(underlyingArray, item);
-    },
-
-    'replace': function(oldItem, newItem) {
-        var index = this['indexOf'](oldItem);
-        if (index >= 0) {
-            this.valueWillMutate();
-            this.peek()[index] = newItem;
-            this.valueHasMutated();
-        }
-    }
-}
-
-// Populate ko.observableArray.fn with read/write functions from native arrays
-// Important: Do not add any additional functions here that may reasonably be used to *read* data from the array
-// because we'll eval them without causing subscriptions, so ko.computed output could end up getting stale
-ko.utils.arrayForEach(["pop", "push", "reverse", "shift", "sort", "splice", "unshift"], function (methodName) {
-    ko.observableArray['fn'][methodName] = function () {
-        // Use "peek" to avoid creating a subscription in any computed that we're executing in the context of
-        // (for consistency with mutating regular observables)
-        var underlyingArray = this.peek();
-        this.valueWillMutate();
-        var methodCallResult = underlyingArray[methodName].apply(underlyingArray, arguments);
-        this.valueHasMutated();
-        return methodCallResult;
-    };
-});
-
-// Populate ko.observableArray.fn with read-only functions from native arrays
-ko.utils.arrayForEach(["slice"], function (methodName) {
-    ko.observableArray['fn'][methodName] = function () {
-        var underlyingArray = this();
-        return underlyingArray[methodName].apply(underlyingArray, arguments);
-    };
-});
-
-ko.exportSymbol('observableArray', ko.observableArray);
-ko.dependentObservable = function (evaluatorFunctionOrOptions, evaluatorFunctionTarget, options) {
-    var _latestValue,
-        _hasBeenEvaluated = false,
-        _isBeingEvaluated = false,
-        readFunction = evaluatorFunctionOrOptions;
-
-    if (readFunction && typeof readFunction == "object") {
-        // Single-parameter syntax - everything is on this "options" param
-        options = readFunction;
-        readFunction = options["read"];
-    } else {
-        // Multi-parameter syntax - construct the options according to the params passed
-        options = options || {};
-        if (!readFunction)
-            readFunction = options["read"];
-    }
-    if (typeof readFunction != "function")
-        throw new Error("Pass a function that returns the value of the ko.computed");
-
-    function addSubscriptionToDependency(subscribable) {
-        _subscriptionsToDependencies.push(subscribable.subscribe(evaluatePossiblyAsync));
-    }
-
-    function disposeAllSubscriptionsToDependencies() {
-        ko.utils.arrayForEach(_subscriptionsToDependencies, function (subscription) {
-            subscription.dispose();
-        });
-        _subscriptionsToDependencies = [];
-    }
-
-    function evaluatePossiblyAsync() {
-        var throttleEvaluationTimeout = dependentObservable['throttleEvaluation'];
-        if (throttleEvaluationTimeout && throttleEvaluationTimeout >= 0) {
-            clearTimeout(evaluationTimeoutInstance);
-            evaluationTimeoutInstance = setTimeout(evaluateImmediate, throttleEvaluationTimeout);
-        } else
-            evaluateImmediate();
-    }
-
-    function evaluateImmediate() {
-        if (_isBeingEvaluated) {
-            // If the evaluation of a ko.computed causes side effects, it's possible that it will trigger its own re-evaluation.
-            // This is not desirable (it's hard for a developer to realise a chain of dependencies might cause this, and they almost
-            // certainly didn't intend infinite re-evaluations). So, for predictability, we simply prevent ko.computeds from causing
-            // their own re-evaluation. Further discussion at https://github.com/SteveSanderson/knockout/pull/387
-            return;
-        }
-
-        // Don't dispose on first evaluation, because the "disposeWhen" callback might
-        // e.g., dispose when the associated DOM element isn't in the doc, and it's not
-        // going to be in the doc until *after* the first evaluation
-        if (_hasBeenEvaluated && disposeWhen()) {
-            dispose();
-            return;
-        }
-
-        _isBeingEvaluated = true;
-        try {
-            // Initially, we assume that none of the subscriptions are still being used (i.e., all are candidates for disposal).
-            // Then, during evaluation, we cross off any that are in fact still being used.
-            var disposalCandidates = ko.utils.arrayMap(_subscriptionsToDependencies, function(item) {return item.target;});
-
-            ko.dependencyDetection.begin(function(subscribable) {
-                var inOld;
-                if ((inOld = ko.utils.arrayIndexOf(disposalCandidates, subscribable)) >= 0)
-                    disposalCandidates[inOld] = undefined; // Don't want to dispose this subscription, as it's still being used
-                else
-                    addSubscriptionToDependency(subscribable); // Brand new subscription - add it
-            });
-
-            var newValue = readFunction.call(evaluatorFunctionTarget);
-
-            // For each subscription no longer being used, remove it from the active subscriptions list and dispose it
-            for (var i = disposalCandidates.length - 1; i >= 0; i--) {
-                if (disposalCandidates[i])
-                    _subscriptionsToDependencies.splice(i, 1)[0].dispose();
-            }
-            _hasBeenEvaluated = true;
-
-            dependentObservable["notifySubscribers"](_latestValue, "beforeChange");
-            _latestValue = newValue;
-            if (DEBUG) dependentObservable._latestValue = _latestValue;
-        } finally {
-            ko.dependencyDetection.end();
-        }
-
-        dependentObservable["notifySubscribers"](_latestValue);
-        _isBeingEvaluated = false;
-        if (!_subscriptionsToDependencies.length)
-            dispose();
-    }
-
-    function dependentObservable() {
-        if (arguments.length > 0) {
-            if (typeof writeFunction === "function") {
-                // Writing a value
-                writeFunction.apply(evaluatorFunctionTarget, arguments);
-            } else {
-                throw new Error("Cannot write a value to a ko.computed unless you specify a 'write' option. If you wish to read the current value, don't pass any parameters.");
-            }
-            return this; // Permits chained assignments
-        } else {
-            // Reading the value
-            if (!_hasBeenEvaluated)
-                evaluateImmediate();
-            ko.dependencyDetection.registerDependency(dependentObservable);
-            return _latestValue;
-        }
-    }
-
-    function peek() {
-        if (!_hasBeenEvaluated)
-            evaluateImmediate();
-        return _latestValue;
-    }
-
-    function isActive() {
-        return !_hasBeenEvaluated || _subscriptionsToDependencies.length > 0;
-    }
-
-    // By here, "options" is always non-null
-    var writeFunction = options["write"],
-        disposeWhenNodeIsRemoved = options["disposeWhenNodeIsRemoved"] || options.disposeWhenNodeIsRemoved || null,
-        disposeWhen = options["disposeWhen"] || options.disposeWhen || function() { return false; },
-        dispose = disposeAllSubscriptionsToDependencies,
-        _subscriptionsToDependencies = [],
-        evaluationTimeoutInstance = null;
-
-    if (!evaluatorFunctionTarget)
-        evaluatorFunctionTarget = options["owner"];
-
-    dependentObservable.peek = peek;
-    dependentObservable.getDependenciesCount = function () { return _subscriptionsToDependencies.length; };
-    dependentObservable.hasWriteFunction = typeof options["write"] === "function";
-    dependentObservable.dispose = function () { dispose(); };
-    dependentObservable.isActive = isActive;
-    dependentObservable.valueHasMutated = function() {
-        _hasBeenEvaluated = false;
-        evaluateImmediate();
-    };
-
-    ko.subscribable.call(dependentObservable);
-    ko.utils.extend(dependentObservable, ko.dependentObservable['fn']);
-
-    ko.exportProperty(dependentObservable, 'peek', dependentObservable.peek);
-    ko.exportProperty(dependentObservable, 'dispose', dependentObservable.dispose);
-    ko.exportProperty(dependentObservable, 'isActive', dependentObservable.isActive);
-    ko.exportProperty(dependentObservable, 'getDependenciesCount', dependentObservable.getDependenciesCount);
-
-    // Evaluate, unless deferEvaluation is true
-    if (options['deferEvaluation'] !== true)
-        evaluateImmediate();
-
-    // Build "disposeWhenNodeIsRemoved" and "disposeWhenNodeIsRemovedCallback" option values.
-    // But skip if isActive is false (there will never be any dependencies to dispose).
-    // (Note: "disposeWhenNodeIsRemoved" option both proactively disposes as soon as the node is removed using ko.removeNode(),
-    // plus adds a "disposeWhen" callback that, on each evaluation, disposes if the node was removed by some other means.)
-    if (disposeWhenNodeIsRemoved && isActive()) {
-        dispose = function() {
-            ko.utils.domNodeDisposal.removeDisposeCallback(disposeWhenNodeIsRemoved, arguments.callee);
-            disposeAllSubscriptionsToDependencies();
-        };
-        ko.utils.domNodeDisposal.addDisposeCallback(disposeWhenNodeIsRemoved, dispose);
-        var existingDisposeWhenFunction = disposeWhen;
-        disposeWhen = function () {
-            return !ko.utils.domNodeIsAttachedToDocument(disposeWhenNodeIsRemoved) || existingDisposeWhenFunction();
-        }
-    }
-
-    return dependentObservable;
-};
-
-ko.isComputed = function(instance) {
-    return ko.hasPrototype(instance, ko.dependentObservable);
-};
-
-var protoProp = ko.observable.protoProperty; // == "__ko_proto__"
-ko.dependentObservable[protoProp] = ko.observable;
-
-ko.dependentObservable['fn'] = {};
-ko.dependentObservable['fn'][protoProp] = ko.dependentObservable;
-
-ko.exportSymbol('dependentObservable', ko.dependentObservable);
-ko.exportSymbol('computed', ko.dependentObservable); // Make "ko.computed" an alias for "ko.dependentObservable"
-ko.exportSymbol('isComputed', ko.isComputed);
-
-(function() {
-    var maxNestedObservableDepth = 10; // Escape the (unlikely) pathalogical case where an observable's current value is itself (or similar reference cycle)
-
-    ko.toJS = function(rootObject) {
-        if (arguments.length == 0)
-            throw new Error("When calling ko.toJS, pass the object you want to convert.");
-
-        // We just unwrap everything at every level in the object graph
-        return mapJsObjectGraph(rootObject, function(valueToMap) {
-            // Loop because an observable's value might in turn be another observable wrapper
-            for (var i = 0; ko.isObservable(valueToMap) && (i < maxNestedObservableDepth); i++)
-                valueToMap = valueToMap();
-            return valueToMap;
-        });
-    };
-
-    ko.toJSON = function(rootObject, replacer, space) {     // replacer and space are optional
-        var plainJavaScriptObject = ko.toJS(rootObject);
-        return ko.utils.stringifyJson(plainJavaScriptObject, replacer, space);
-    };
-
-    function mapJsObjectGraph(rootObject, mapInputCallback, visitedObjects) {
-        visitedObjects = visitedObjects || new objectLookup();
-
-        rootObject = mapInputCallback(rootObject);
-        var canHaveProperties = (typeof rootObject == "object") && (rootObject !== null) && (rootObject !== undefined) && (!(rootObject instanceof Date));
-        if (!canHaveProperties)
-            return rootObject;
-
-        var outputProperties = rootObject instanceof Array ? [] : {};
-        visitedObjects.save(rootObject, outputProperties);
-
-        visitPropertiesOrArrayEntries(rootObject, function(indexer) {
-            var propertyValue = mapInputCallback(rootObject[indexer]);
-
-            switch (typeof propertyValue) {
-                case "boolean":
-                case "number":
-                case "string":
-                case "function":
-                    outputProperties[indexer] = propertyValue;
-                    break;
-                case "object":
-                case "undefined":
-                    var previouslyMappedValue = visitedObjects.get(propertyValue);
-                    outputProperties[indexer] = (previouslyMappedValue !== undefined)
-                        ? previouslyMappedValue
-                        : mapJsObjectGraph(propertyValue, mapInputCallback, visitedObjects);
-                    break;
-            }
-        });
-
-        return outputProperties;
-    }
-
-    function visitPropertiesOrArrayEntries(rootObject, visitorCallback) {
-        if (rootObject instanceof Array) {
-            for (var i = 0; i < rootObject.length; i++)
-                visitorCallback(i);
-
-            // For arrays, also respect toJSON property for custom mappings (fixes #278)
-            if (typeof rootObject['toJSON'] == 'function')
-                visitorCallback('toJSON');
-        } else {
-            for (var propertyName in rootObject)
-                visitorCallback(propertyName);
-        }
-    };
-
-    function objectLookup() {
-        var keys = [];
-        var values = [];
-        this.save = function(key, value) {
-            var existingIndex = ko.utils.arrayIndexOf(keys, key);
-            if (existingIndex >= 0)
-                values[existingIndex] = value;
-            else {
-                keys.push(key);
-                values.push(value);
-            }
-        };
-        this.get = function(key) {
-            var existingIndex = ko.utils.arrayIndexOf(keys, key);
-            return (existingIndex >= 0) ? values[existingIndex] : undefined;
-        };
-    };
-})();
-
-ko.exportSymbol('toJS', ko.toJS);
-ko.exportSymbol('toJSON', ko.toJSON);
-(function () {
-    var hasDomDataExpandoProperty = '__ko__hasDomDataOptionValue__';
-
-    // Normally, SELECT elements and their OPTIONs can only take value of type 'string' (because the values
-    // are stored on DOM attributes). ko.selectExtensions provides a way for SELECTs/OPTIONs to have values
-    // that are arbitrary objects. This is very convenient when implementing things like cascading dropdowns.
-    ko.selectExtensions = {
-        readValue : function(element) {
-            switch (ko.utils.tagNameLower(element)) {
-                case 'option':
-                    if (element[hasDomDataExpandoProperty] === true)
-                        return ko.utils.domData.get(element, ko.bindingHandlers.options.optionValueDomDataKey);
-                    return ko.utils.ieVersion <= 7
-                        ? (element.getAttributeNode('value').specified ? element.value : element.text)
-                        : element.value;
-                case 'select':
-                    return element.selectedIndex >= 0 ? ko.selectExtensions.readValue(element.options[element.selectedIndex]) : undefined;
-                default:
-                    return element.value;
-            }
-        },
-
-        writeValue: function(element, value) {
-            switch (ko.utils.tagNameLower(element)) {
-                case 'option':
-                    switch(typeof value) {
-                        case "string":
-                            ko.utils.domData.set(element, ko.bindingHandlers.options.optionValueDomDataKey, undefined);
-                            if (hasDomDataExpandoProperty in element) { // IE <= 8 throws errors if you delete non-existent properties from a DOM node
-                                delete element[hasDomDataExpandoProperty];
-                            }
-                            element.value = value;
-                            break;
-                        default:
-                            // Store arbitrary object using DomData
-                            ko.utils.domData.set(element, ko.bindingHandlers.options.optionValueDomDataKey, value);
-                            element[hasDomDataExpandoProperty] = true;
-
-                            // Special treatment of numbers is just for backward compatibility. KO 1.2.1 wrote numerical values to element.value.
-                            element.value = typeof value === "number" ? value : "";
-                            break;
-                    }
-                    break;
-                case 'select':
-                    for (var i = element.options.length - 1; i >= 0; i--) {
-                        if (ko.selectExtensions.readValue(element.options[i]) == value) {
-                            element.selectedIndex = i;
-                            break;
-                        }
-                    }
-                    break;
-                default:
-                    if ((value === null) || (value === undefined))
-                        value = "";
-                    element.value = value;
-                    break;
-            }
-        }
-    };
-})();
-
-ko.exportSymbol('selectExtensions', ko.selectExtensions);
-ko.exportSymbol('selectExtensions.readValue', ko.selectExtensions.readValue);
-ko.exportSymbol('selectExtensions.writeValue', ko.selectExtensions.writeValue);
-ko.expressionRewriting = (function () {
-    var restoreCapturedTokensRegex = /\@ko_token_(\d+)\@/g;
-    var javaScriptReservedWords = ["true", "false"];
-
-    // Matches something that can be assigned to--either an isolated identifier or something ending with a property accessor
-    // This is designed to be simple and avoid false negatives, but could produce false positives (e.g., a+b.c).
-    var javaScriptAssignmentTarget = /^(?:[$_a-z][$\w]*|(.+)(\.\s*[$_a-z][$\w]*|\[.+\]))$/i;
-
-    function restoreTokens(string, tokens) {
-        var prevValue = null;
-        while (string != prevValue) { // Keep restoring tokens until it no longer makes a difference (they may be nested)
-            prevValue = string;
-            string = string.replace(restoreCapturedTokensRegex, function (match, tokenIndex) {
-                return tokens[tokenIndex];
-            });
-        }
-        return string;
-    }
-
-    function getWriteableValue(expression) {
-        if (ko.utils.arrayIndexOf(javaScriptReservedWords, ko.utils.stringTrim(expression).toLowerCase()) >= 0)
-            return false;
-        var match = expression.match(javaScriptAssignmentTarget);
-        return match === null ? false : match[1] ? ('Object(' + match[1] + ')' + match[2]) : expression;
-    }
-
-    function ensureQuoted(key) {
-        var trimmedKey = ko.utils.stringTrim(key);
-        switch (trimmedKey.length && trimmedKey.charAt(0)) {
-            case "'":
-            case '"':
-                return key;
-            default:
-                return "'" + trimmedKey + "'";
-        }
-    }
-
-    return {
-        bindingRewriteValidators: [],
-
-        parseObjectLiteral: function(objectLiteralString) {
-            // A full tokeniser+lexer would add too much weight to this library, so here's a simple parser
-            // that is sufficient just to split an object literal string into a set of top-level key-value pairs
-
-            var str = ko.utils.stringTrim(objectLiteralString);
-            if (str.length < 3)
-                return [];
-            if (str.charAt(0) === "{")// Ignore any braces surrounding the whole object literal
-                str = str.substring(1, str.length - 1);
-
-            // Pull out any string literals and regex literals
-            var tokens = [];
-            var tokenStart = null, tokenEndChar;
-            for (var position = 0; position < str.length; position++) {
-                var c = str.charAt(position);
-                if (tokenStart === null) {
-                    switch (c) {
-                        case '"':
-                        case "'":
-                        case "/":
-                            tokenStart = position;
-                            tokenEndChar = c;
-                            break;
-                    }
-                } else if ((c == tokenEndChar) && (str.charAt(position - 1) !== "\\")) {
-                    var token = str.substring(tokenStart, position + 1);
-                    tokens.push(token);
-                    var replacement = "@ko_token_" + (tokens.length - 1) + "@";
-                    str = str.substring(0, tokenStart) + replacement + str.substring(position + 1);
-                    position -= (token.length - replacement.length);
-                    tokenStart = null;
-                }
-            }
-
-            // Next pull out balanced paren, brace, and bracket blocks
-            tokenStart = null;
-            tokenEndChar = null;
-            var tokenDepth = 0, tokenStartChar = null;
-            for (var position = 0; position < str.length; position++) {
-                var c = str.charAt(position);
-                if (tokenStart === null) {
-                    switch (c) {
-                        case "{": tokenStart = position; tokenStartChar = c;
-                                  tokenEndChar = "}";
-                                  break;
-                        case "(": tokenStart = position; tokenStartChar = c;
-                                  tokenEndChar = ")";
-                                  break;
-                        case "[": tokenStart = position; tokenStartChar = c;
-                                  tokenEndChar = "]";
-                                  break;
-                    }
-                }
-
-                if (c === tokenStartChar)
-                    tokenDepth++;
-                else if (c === tokenEndChar) {
-                    tokenDepth--;
-                    if (tokenDepth === 0) {
-                        var token = str.substring(tokenStart, position + 1);
-                        tokens.push(token);
-                        var replacement = "@ko_token_" + (tokens.length - 1) + "@";
-                        str = str.substring(0, tokenStart) + replacement + str.substring(position + 1);
-                        position -= (token.length - replacement.length);
-                        tokenStart = null;
-                    }
-                }
-            }
-
-            // Now we can safely split on commas to get the key/value pairs
-            var result = [];
-            var keyValuePairs = str.split(",");
-            for (var i = 0, j = keyValuePairs.length; i < j; i++) {
-                var pair = keyValuePairs[i];
-                var colonPos = pair.indexOf(":");
-                if ((colonPos > 0) && (colonPos < pair.length - 1)) {
-                    var key = pair.substring(0, colonPos);
-                    var value = pair.substring(colonPos + 1);
-                    result.push({ 'key': restoreTokens(key, tokens), 'value': restoreTokens(value, tokens) });
-                } else {
-                    result.push({ 'unknown': restoreTokens(pair, tokens) });
-                }
-            }
-            return result;
-        },
-
-        preProcessBindings: function (objectLiteralStringOrKeyValueArray) {
-            var keyValueArray = typeof objectLiteralStringOrKeyValueArray === "string"
-                ? ko.expressionRewriting.parseObjectLiteral(objectLiteralStringOrKeyValueArray)
-                : objectLiteralStringOrKeyValueArray;
-            var resultStrings = [], propertyAccessorResultStrings = [];
-
-            var keyValueEntry;
-            for (var i = 0; keyValueEntry = keyValueArray[i]; i++) {
-                if (resultStrings.length > 0)
-                    resultStrings.push(",");
-
-                if (keyValueEntry['key']) {
-                    var quotedKey = ensureQuoted(keyValueEntry['key']), val = keyValueEntry['value'];
-                    resultStrings.push(quotedKey);
-                    resultStrings.push(":");
-                    resultStrings.push(val);
-
-                    if (val = getWriteableValue(ko.utils.stringTrim(val))) {
-                        if (propertyAccessorResultStrings.length > 0)
-                            propertyAccessorResultStrings.push(", ");
-                        propertyAccessorResultStrings.push(quotedKey + " : function(__ko_value) { " + val + " = __ko_value; }");
-                    }
-                } else if (keyValueEntry['unknown']) {
-                    resultStrings.push(keyValueEntry['unknown']);
-                }
-            }
-
-            var combinedResult = resultStrings.join("");
-            if (propertyAccessorResultStrings.length > 0) {
-                var allPropertyAccessors = propertyAccessorResultStrings.join("");
-                combinedResult = combinedResult + ", '_ko_property_writers' : { " + allPropertyAccessors + " } ";
-            }
-
-            return combinedResult;
-        },
-
-        keyValueArrayContainsKey: function(keyValueArray, key) {
-            for (var i = 0; i < keyValueArray.length; i++)
-                if (ko.utils.stringTrim(keyValueArray[i]['key']) == key)
-                    return true;
-            return false;
-        },
-
-        // Internal, private KO utility for updating model properties from within bindings
-        // property:            If the property being updated is (or might be) an observable, pass it here
-        //                      If it turns out to be a writable observable, it will be written to directly
-        // allBindingsAccessor: All bindings in the current execution context.
-        //                      This will be searched for a '_ko_property_writers' property in case you're writing to a non-observable
-        // key:                 The key identifying the property to be written. Example: for { hasFocus: myValue }, write to 'myValue' by specifying the key 'hasFocus'
-        // value:               The value to be written
-        // checkIfDifferent:    If true, and if the property being written is a writable observable, the value will only be written if
-        //                      it is !== existing value on that writable observable
-        writeValueToProperty: function(property, allBindingsAccessor, key, value, checkIfDifferent) {
-            if (!property || !ko.isWriteableObservable(property)) {
-                var propWriters = allBindingsAccessor()['_ko_property_writers'];
-                if (propWriters && propWriters[key])
-                    propWriters[key](value);
-            } else if (!checkIfDifferent || property.peek() !== value) {
-                property(value);
-            }
-        }
-    };
-})();
-
-ko.exportSymbol('expressionRewriting', ko.expressionRewriting);
-ko.exportSymbol('expressionRewriting.bindingRewriteValidators', ko.expressionRewriting.bindingRewriteValidators);
-ko.exportSymbol('expressionRewriting.parseObjectLiteral', ko.expressionRewriting.parseObjectLiteral);
-ko.exportSymbol('expressionRewriting.preProcessBindings', ko.expressionRewriting.preProcessBindings);
-
-// For backward compatibility, define the following aliases. (Previously, these function names were misleading because
-// they referred to JSON specifically, even though they actually work with arbitrary JavaScript object literal expressions.)
-ko.exportSymbol('jsonExpressionRewriting', ko.expressionRewriting);
-ko.exportSymbol('jsonExpressionRewriting.insertPropertyAccessorsIntoJson', ko.expressionRewriting.preProcessBindings);(function() {
-    // "Virtual elements" is an abstraction on top of the usual DOM API which understands the notion that comment nodes
-    // may be used to represent hierarchy (in addition to the DOM's natural hierarchy).
-    // If you call the DOM-manipulating functions on ko.virtualElements, you will be able to read and write the state
-    // of that virtual hierarchy
-    //
-    // The point of all this is to support containerless templates (e.g., <!-- ko foreach:someCollection -->blah<!-- /ko -->)
-    // without having to scatter special cases all over the binding and templating code.
-
-    // IE 9 cannot reliably read the "nodeValue" property of a comment node (see https://github.com/SteveSanderson/knockout/issues/186)
-    // but it does give them a nonstandard alternative property called "text" that it can read reliably. Other browsers don't have that property.
-    // So, use node.text where available, and node.nodeValue elsewhere
-    var commentNodesHaveTextProperty = document.createComment("test").text === "<!--test-->";
-
-    var startCommentRegex = commentNodesHaveTextProperty ? /^<!--\s*ko(?:\s+(.+\s*\:[\s\S]*))?\s*-->$/ : /^\s*ko(?:\s+(.+\s*\:[\s\S]*))?\s*$/;
-    var endCommentRegex =   commentNodesHaveTextProperty ? /^<!--\s*\/ko\s*-->$/ : /^\s*\/ko\s*$/;
-    var htmlTagsWithOptionallyClosingChildren = { 'ul': true, 'ol': true };
-
-    function isStartComment(node) {
-        return (node.nodeType == 8) && (commentNodesHaveTextProperty ? node.text : node.nodeValue).match(startCommentRegex);
-    }
-
-    function isEndComment(node) {
-        return (node.nodeType == 8) && (commentNodesHaveTextProperty ? node.text : node.nodeValue).match(endCommentRegex);
-    }
-
-    function getVirtualChildren(startComment, allowUnbalanced) {
-        var currentNode = startComment;
-        var depth = 1;
-        var children = [];
-        while (currentNode = currentNode.nextSibling) {
-            if (isEndComment(currentNode)) {
-                depth--;
-                if (depth === 0)
-                    return children;
-            }
-
-            children.push(currentNode);
-
-            if (isStartComment(currentNode))
-                depth++;
-        }
-        if (!allowUnbalanced)
-            throw new Error("Cannot find closing comment tag to match: " + startComment.nodeValue);
-        return null;
-    }
-
-    function getMatchingEndComment(startComment, allowUnbalanced) {
-        var allVirtualChildren = getVirtualChildren(startComment, allowUnbalanced);
-        if (allVirtualChildren) {
-            if (allVirtualChildren.length > 0)
-                return allVirtualChildren[allVirtualChildren.length - 1].nextSibling;
-            return startComment.nextSibling;
-        } else
-            return null; // Must have no matching end comment, and allowUnbalanced is true
-    }
-
-    function getUnbalancedChildTags(node) {
-        // e.g., from <div>OK</div><!-- ko blah --><span>Another</span>, returns: <!-- ko blah --><span>Another</span>
-        //       from <div>OK</div><!-- /ko --><!-- /ko -->,             returns: <!-- /ko --><!-- /ko -->
-        var childNode = node.firstChild, captureRemaining = null;
-        if (childNode) {
-            do {
-                if (captureRemaining)                   // We already hit an unbalanced node and are now just scooping up all subsequent nodes
-                    captureRemaining.push(childNode);
-                else if (isStartComment(childNode)) {
-                    var matchingEndComment = getMatchingEndComment(childNode, /* allowUnbalanced: */ true);
-                    if (matchingEndComment)             // It's a balanced tag, so skip immediately to the end of this virtual set
-                        childNode = matchingEndComment;
-                    else
-                        captureRemaining = [childNode]; // It's unbalanced, so start capturing from this point
-                } else if (isEndComment(childNode)) {
-                    captureRemaining = [childNode];     // It's unbalanced (if it wasn't, we'd have skipped over it already), so start capturing
-                }
-            } while (childNode = childNode.nextSibling);
-        }
-        return captureRemaining;
-    }
-
-    ko.virtualElements = {
-        allowedBindings: {},
-
-        childNodes: function(node) {
-            return isStartComment(node) ? getVirtualChildren(node) : node.childNodes;
-        },
-
-        emptyNode: function(node) {
-            if (!isStartComment(node))
-                ko.utils.emptyDomNode(node);
-            else {
-                var virtualChildren = ko.virtualElements.childNodes(node);
-                for (var i = 0, j = virtualChildren.length; i < j; i++)
-                    ko.removeNode(virtualChildren[i]);
-            }
-        },
-
-        setDomNodeChildren: function(node, childNodes) {
-            if (!isStartComment(node))
-                ko.utils.setDomNodeChildren(node, childNodes);
-            else {
-                ko.virtualElements.emptyNode(node);
-                var endCommentNode = node.nextSibling; // Must be the next sibling, as we just emptied the children
-                for (var i = 0, j = childNodes.length; i < j; i++)
-                    endCommentNode.parentNode.insertBefore(childNodes[i], endCommentNode);
-            }
-        },
-
-        prepend: function(containerNode, nodeToPrepend) {
-            if (!isStartComment(containerNode)) {
-                if (containerNode.firstChild)
-                    containerNode.insertBefore(nodeToPrepend, containerNode.firstChild);
-                else
-                    containerNode.appendChild(nodeToPrepend);
-            } else {
-                // Start comments must always have a parent and at least one following sibling (the end comment)
-                containerNode.parentNode.insertBefore(nodeToPrepend, containerNode.nextSibling);
-            }
-        },
-
-        insertAfter: function(containerNode, nodeToInsert, insertAfterNode) {
-            if (!insertAfterNode) {
-                ko.virtualElements.prepend(containerNode, nodeToInsert);
-            } else if (!isStartComment(containerNode)) {
-                // Insert after insertion point
-                if (insertAfterNode.nextSibling)
-                    containerNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling);
-                else
-                    containerNode.appendChild(nodeToInsert);
-            } else {
-                // Children of start comments must always have a parent and at least one following sibling (the end comment)
-                containerNode.parentNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling);
-            }
-        },
-
-        firstChild: function(node) {
-            if (!isStartComment(node))
-                return node.firstChild;
-            if (!node.nextSibling || isEndComment(node.nextSibling))
-                return null;
-            return node.nextSibling;
-        },
-
-        nextSibling: function(node) {
-            if (isStartComment(node))
-                node = getMatchingEndComment(node);
-            if (node.nextSibling && isEndComment(node.nextSibling))
-                return null;
-            return node.nextSibling;
-        },
-
-        virtualNodeBindingValue: function(node) {
-            var regexMatch = isStartComment(node);
-            return regexMatch ? regexMatch[1] : null;
-        },
-
-        normaliseVirtualElementDomStructure: function(elementVerified) {
-            // Workaround for https://github.com/SteveSanderson/knockout/issues/155
-            // (IE <= 8 or IE 9 quirks mode parses your HTML weirdly, treating closing </li> tags as if they don't exist, thereby moving comment nodes
-            // that are direct descendants of <ul> into the preceding <li>)
-            if (!htmlTagsWithOptionallyClosingChildren[ko.utils.tagNameLower(elementVerified)])
-                return;
-
-            // Scan immediate children to see if they contain unbalanced comment tags. If they do, those comment tags
-            // must be intended to appear *after* that child, so move them there.
-            var childNode = elementVerified.firstChild;
-            if (childNode) {
-                do {
-                    if (childNode.nodeType === 1) {
-                        var unbalancedTags = getUnbalancedChildTags(childNode);
-                        if (unbalancedTags) {
-                            // Fix up the DOM by moving the unbalanced tags to where they most likely were intended to be placed - *after* the child
-                            var nodeToInsertBefore = childNode.nextSibling;
-                            for (var i = 0; i < unbalancedTags.length; i++) {
-                                if (nodeToInsertBefore)
-                                    elementVerified.insertBefore(unbalancedTags[i], nodeToInsertBefore);
-                                else
-                                    elementVerified.appendChild(unbalancedTags[i]);
-                            }
-                        }
-                    }
-                } while (childNode = childNode.nextSibling);
-            }
-        }
-    };
-})();
-ko.exportSymbol('virtualElements', ko.virtualElements);
-ko.exportSymbol('virtualElements.allowedBindings', ko.virtualElements.allowedBindings);
-ko.exportSymbol('virtualElements.emptyNode', ko.virtualElements.emptyNode);
-//ko.exportSymbol('virtualElements.firstChild', ko.virtualElements.firstChild);     // firstChild is not minified
-ko.exportSymbol('virtualElements.insertAfter', ko.virtualElements.insertAfter);
-//ko.exportSymbol('virtualElements.nextSibling', ko.virtualElements.nextSibling);   // nextSibling is not minified
-ko.exportSymbol('virtualElements.prepend', ko.virtualElements.prepend);
-ko.exportSymbol('virtualElements.setDomNodeChildren', ko.virtualElements.setDomNodeChildren);
-(function() {
-    var defaultBindingAttributeName = "data-bind";
-
-    ko.bindingProvider = function() {
-        this.bindingCache = {};
-    };
-
-    ko.utils.extend(ko.bindingProvider.prototype, {
-        'nodeHasBindings': function(node) {
-            switch (node.nodeType) {
-                case 1: return node.getAttribute(defaultBindingAttributeName) != null;   // Element
-                case 8: return ko.virtualElements.virtualNodeBindingValue(node) != null; // Comment node
-                default: return false;
-            }
-        },
-
-        'getBindings': function(node, bindingContext) {
-            var bindingsString = this['getBindingsString'](node, bindingContext);
-            return bindingsString ? this['parseBindingsString'](bindingsString, bindingContext, node) : null;
-        },
-
-        // The following function is only used internally by this default provider.
-        // It's not part of the interface definition for a general binding provider.
-        'getBindingsString': function(node, bindingContext) {
-            switch (node.nodeType) {
-                case 1: return node.getAttribute(defaultBindingAttributeName);   // Element
-                case 8: return ko.virtualElements.virtualNodeBindingValue(node); // Comment node
-                default: return null;
-            }
-        },
-
-        // The following function is only used internally by this default provider.
-        // It's not part of the interface definition for a general binding provider.
-        'parseBindingsString': function(bindingsString, bindingContext, node) {
-            try {
-                var bindingFunction = createBindingsStringEvaluatorViaCache(bindingsString, this.bindingCache);
-                return bindingFunction(bindingContext, node);
-            } catch (ex) {
-                throw new Error("Unable to parse bindings.\nMessage: " + ex + ";\nBindings value: " + bindingsString);
-            }
-        }
-    });
-
-    ko.bindingProvider['instance'] = new ko.bindingProvider();
-
-    function createBindingsStringEvaluatorViaCache(bindingsString, cache) {
-        var cacheKey = bindingsString;
-        return cache[cacheKey]
-            || (cache[cacheKey] = createBindingsStringEvaluator(bindingsString));
-    }
-
-    function createBindingsStringEvaluator(bindingsString) {
-        // Build the source for a function that evaluates "expression"
-        // For each scope variable, add an extra level of "with" nesting
-        // Example result: with(sc1) { with(sc0) { return (expression) } }
-        var rewrittenBindings = ko.expressionRewriting.preProcessBindings(bindingsString),
-            functionBody = "with($context){with($data||{}){return{" + rewrittenBindings + "}}}";
-        return new Function("$context", "$element", functionBody);
-    }
-})();
-
-ko.exportSymbol('bindingProvider', ko.bindingProvider);
-(function () {
-    ko.bindingHandlers = {};
-
-    ko.bindingContext = function(dataItem, parentBindingContext, dataItemAlias) {
-        if (parentBindingContext) {
-            ko.utils.extend(this, parentBindingContext); // Inherit $root and any custom properties
-            this['$parentContext'] = parentBindingContext;
-            this['$parent'] = parentBindingContext['$data'];
-            this['$parents'] = (parentBindingContext['$parents'] || []).slice(0);
-            this['$parents'].unshift(this['$parent']);
-        } else {
-            this['$parents'] = [];
-            this['$root'] = dataItem;
-            // Export 'ko' in the binding context so it will be available in bindings and templates
-            // even if 'ko' isn't exported as a global, such as when using an AMD loader.
-            // See https://github.com/SteveSanderson/knockout/issues/490
-            this['ko'] = ko;
-        }
-        this['$data'] = dataItem;
-        if (dataItemAlias)
-            this[dataItemAlias] = dataItem;
-    }
-    ko.bindingContext.prototype['createChildContext'] = function (dataItem, dataItemAlias) {
-        return new ko.bindingContext(dataItem, this, dataItemAlias);
-    };
-    ko.bindingContext.prototype['extend'] = function(properties) {
-        var clone = ko.utils.extend(new ko.bindingContext(), this);
-        return ko.utils.extend(clone, properties);
-    };
-
-    function validateThatBindingIsAllowedForVirtualElements(bindingName) {
-        var validator = ko.virtualElements.allowedBindings[bindingName];
-        if (!validator)
-            throw new Error("The binding '" + bindingName + "' cannot be used with virtual elements")
-    }
-
-    function applyBindingsToDescendantsInternal (viewModel, elementOrVirtualElement, bindingContextsMayDifferFromDomParentElement) {
-        var currentChild, nextInQueue = ko.virtualElements.firstChild(elementOrVirtualElement);
-        while (currentChild = nextInQueue) {
-            // Keep a record of the next child *before* applying bindings, in case the binding removes the current child from its position
-            nextInQueue = ko.virtualElements.nextSibling(currentChild);
-            applyBindingsToNodeAndDescendantsInternal(viewModel, currentChild, bindingContextsMayDifferFromDomParentElement);
-        }
-    }
-
-    function applyBindingsToNodeAndDescendantsInternal (viewModel, nodeVerified, bindingContextMayDifferFromDomParentElement) {
-        var shouldBindDescendants = true;
-
-        // Perf optimisation: Apply bindings only if...
-        // (1) We need to store the binding context on this node (because it may differ from the DOM parent node's binding context)
-        //     Note that we can't store binding contexts on non-elements (e.g., text nodes), as IE doesn't allow expando properties for those
-        // (2) It might have bindings (e.g., it has a data-bind attribute, or it's a marker for a containerless template)
-        var isElement = (nodeVerified.nodeType === 1);
-        if (isElement) // Workaround IE <= 8 HTML parsing weirdness
-            ko.virtualElements.normaliseVirtualElementDomStructure(nodeVerified);
-
-        var shouldApplyBindings = (isElement && bindingContextMayDifferFromDomParentElement)             // Case (1)
-                               || ko.bindingProvider['instance']['nodeHasBindings'](nodeVerified);       // Case (2)
-        if (shouldApplyBindings)
-            shouldBindDescendants = applyBindingsToNodeInternal(nodeVerified, null, viewModel, bindingContextMayDifferFromDomParentElement).shouldBindDescendants;
-
-        if (shouldBindDescendants) {
-            // We're recursing automatically into (real or virtual) child nodes without changing binding contexts. So,
-            //  * For children of a *real* element, the binding context is certainly the same as on their DOM .parentNode,
-            //    hence bindingContextsMayDifferFromDomParentElement is false
-            //  * For children of a *virtual* element, we can't be sure. Evaluating .parentNode on those children may
-            //    skip over any number of intermediate virtual elements, any of which might define a custom binding context,
-            //    hence bindingContextsMayDifferFromDomParentElement is true
-            applyBindingsToDescendantsInternal(viewModel, nodeVerified, /* bindingContextsMayDifferFromDomParentElement: */ !isElement);
-        }
-    }
-
-    function applyBindingsToNodeInternal (node, bindings, viewModelOrBindingContext, bindingContextMayDifferFromDomParentElement) {
-        // Need to be sure that inits are only run once, and updates never run until all the inits have been run
-        var initPhase = 0; // 0 = before all inits, 1 = during inits, 2 = after all inits
-
-        // Each time the dependentObservable is evaluated (after data changes),
-        // the binding attribute is reparsed so that it can pick out the correct
-        // model properties in the context of the changed data.
-        // DOM event callbacks need to be able to access this changed data,
-        // so we need a single parsedBindings variable (shared by all callbacks
-        // associated with this node's bindings) that all the closures can access.
-        var parsedBindings;
-        function makeValueAccessor(bindingKey) {
-            return function () { return parsedBindings[bindingKey] }
-        }
-        function parsedBindingsAccessor() {
-            return parsedBindings;
-        }
-
-        var bindingHandlerThatControlsDescendantBindings;
-        ko.dependentObservable(
-            function () {
-                // Ensure we have a nonnull binding context to work with
-                var bindingContextInstance = viewModelOrBindingContext && (viewModelOrBindingContext instanceof ko.bindingContext)
-                    ? viewModelOrBindingContext
-                    : new ko.bindingContext(ko.utils.unwrapObservable(viewModelOrBindingContext));
-                var viewModel = bindingContextInstance['$data'];
-
-                // Optimization: Don't store the binding context on this node if it's definitely the same as on node.parentNode, because
-                // we can easily recover it just by scanning up the node's ancestors in the DOM
-                // (note: here, parent node means "real DOM parent" not "virtual parent", as there's no O(1) way to find the virtual parent)
-                if (bindingContextMayDifferFromDomParentElement)
-                    ko.storedBindingContextForNode(node, bindingContextInstance);
-
-                // Use evaluatedBindings if given, otherwise fall back on asking the bindings provider to give us some bindings
-                var evaluatedBindings = (typeof bindings == "function") ? bindings(bindingContextInstance, node) : bindings;
-                parsedBindings = evaluatedBindings || ko.bindingProvider['instance']['getBindings'](node, bindingContextInstance);
-
-                if (parsedBindings) {
-                    // First run all the inits, so bindings can register for notification on changes
-                    if (initPhase === 0) {
-                        initPhase = 1;
-                        for (var bindingKey in parsedBindings) {
-                            var binding = ko.bindingHandlers[bindingKey];
-                            if (binding && node.nodeType === 8)
-                                validateThatBindingIsAllowedForVirtualElements(bindingKey);
-
-                            if (binding && typeof binding["init"] == "function") {
-                                var handlerInitFn = binding["init"];
-                                var initResult = handlerInitFn(node, makeValueAccessor(bindingKey), parsedBindingsAccessor, viewModel, bindingContextInstance);
-
-                                // If this binding handler claims to control descendant bindings, make a note of this
-                                if (initResult && initResult['controlsDescendantBindings']) {
-                                    if (bindingHandlerThatControlsDescendantBindings !== undefined)
-                                        throw new Error("Multiple bindings (" + bindingHandlerThatControlsDescendantBindings + " and " + bindingKey + ") are trying to control descendant bindings of the same element. You cannot use these bindings together on the same element.");
-                                    bindingHandlerThatControlsDescendantBindings = bindingKey;
-                                }
-                            }
-                        }
-                        initPhase = 2;
-                    }
-
-                    // ... then run all the updates, which might trigger changes even on the first evaluation
-                    if (initPhase === 2) {
-                        for (var bindingKey in parsedBindings) {
-                            var binding = ko.bindingHandlers[bindingKey];
-                            if (binding && typeof binding["update"] == "function") {
-                                var handlerUpdateFn = binding["update"];
-                                handlerUpdateFn(node, makeValueAccessor(bindingKey), parsedBindingsAccessor, viewModel, bindingContextInstance);
-                            }
-                        }
-                    }
-                }
-            },
-            null,
-            { disposeWhenNodeIsRemoved : node }
-        );
-
-        return {
-            shouldBindDescendants: bindingHandlerThatControlsDescendantBindings === undefined
-        };
-    };
-
-    var storedBindingContextDomDataKey = "__ko_bindingContext__";
-    ko.storedBindingContextForNode = function (node, bindingContext) {
-        if (arguments.length == 2)
-            ko.utils.domData.set(node, storedBindingContextDomDataKey, bindingContext);
-        else
-            return ko.utils.domData.get(node, storedBindingContextDomDataKey);
-    }
-
-    ko.applyBindingsToNode = function (node, bindings, viewModel) {
-        if (node.nodeType === 1) // If it's an element, workaround IE <= 8 HTML parsing weirdness
-            ko.virtualElements.normaliseVirtualElementDomStructure(node);
-        return applyBindingsToNodeInternal(node, bindings, viewModel, true);
-    };
-
-    ko.applyBindingsToDescendants = function(viewModel, rootNode) {
-        if (rootNode.nodeType === 1 || rootNode.nodeType === 8)
-            applyBindingsToDescendantsInternal(viewModel, rootNode, true);
-    };
-
-    ko.applyBindings = function (viewModel, rootNode) {
-        if (rootNode && (rootNode.nodeType !== 1) && (rootNode.nodeType !== 8))
-            throw new Error("ko.applyBindings: first parameter should be your view model; second parameter should be a DOM node");
-        rootNode = rootNode || window.document.body; // Make "rootNode" parameter optional
-
-        applyBindingsToNodeAndDescendantsInternal(viewModel, rootNode, true);
-    };
-
-    // Retrieving binding context from arbitrary nodes
-    ko.contextFor = function(node) {
-        // We can only do something meaningful for elements and comment nodes (in particular, not text nodes, as IE can't store domdata for them)
-        switch (node.nodeType) {
-            case 1:
-            case 8:
-                var context = ko.storedBindingContextForNode(node);
-                if (context) return context;
-                if (node.parentNode) return ko.contextFor(node.parentNode);
-                break;
-        }
-        return undefined;
-    };
-    ko.dataFor = function(node) {
-        var context = ko.contextFor(node);
-        return context ? context['$data'] : undefined;
-    };
-
-    ko.exportSymbol('bindingHandlers', ko.bindingHandlers);
-    ko.exportSymbol('applyBindings', ko.applyBindings);
-    ko.exportSymbol('applyBindingsToDescendants', ko.applyBindingsToDescendants);
-    ko.exportSymbol('applyBindingsToNode', ko.applyBindingsToNode);
-    ko.exportSymbol('contextFor', ko.contextFor);
-    ko.exportSymbol('dataFor', ko.dataFor);
-})();
-var attrHtmlToJavascriptMap = { 'class': 'className', 'for': 'htmlFor' };
-ko.bindingHandlers['attr'] = {
-    'update': function(element, valueAccessor, allBindingsAccessor) {
-        var value = ko.utils.unwrapObservable(valueAccessor()) || {};
-        for (var attrName in value) {
-            if (typeof attrName == "string") {
-                var attrValue = ko.utils.unwrapObservable(value[attrName]);
-
-                // To cover cases like "attr: { checked:someProp }", we want to remove the attribute entirely
-                // when someProp is a "no value"-like value (strictly null, false, or undefined)
-                // (because the absence of the "checked" attr is how to mark an element as not checked, etc.)
-                var toRemove = (attrValue === false) || (attrValue === null) || (attrValue === undefined);
-                if (toRemove)
-                    element.removeAttribute(attrName);
-
-                // In IE <= 7 and IE8 Quirks Mode, you have to use the Javascript property name instead of the
-                // HTML attribute name for certain attributes. IE8 Standards Mode supports the correct behavior,
-                // but instead of figuring out the mode, we'll just set the attribute through the Javascript
-                // property for IE <= 8.
-                if (ko.utils.ieVersion <= 8 && attrName in attrHtmlToJavascriptMap) {
-                    attrName = attrHtmlToJavascriptMap[attrName];
-                    if (toRemove)
-                        element.removeAttribute(attrName);
-                    else
-                        element[attrName] = attrValue;
-                } else if (!toRemove) {
-                    try {
-                        element.setAttribute(attrName, attrValue.toString());
-                    } catch (err) {
-                        // ignore for now
-                        if (console) {
-                            console.log("Can't set attribute " + attrName + " to " + attrValue + " error: " + err);
-                        }
-                    }
-                }
-
-                // Treat "name" specially - although you can think of it as an attribute, it also needs
-                // special handling on older versions of IE (https://github.com/SteveSanderson/knockout/pull/333)
-                // Deliberately being case-sensitive here because XHTML would regard "Name" as a different thing
-                // entirely, and there's no strong reason to allow for such casing in HTML.
-                if (attrName === "name") {
-                    ko.utils.setElementName(element, toRemove ? "" : attrValue.toString());
-                }
-            }
-        }
-    }
-};
-ko.bindingHandlers['checked'] = {
-    'init': function (element, valueAccessor, allBindingsAccessor) {
-        var updateHandler = function() {
-            var valueToWrite;
-            if (element.type == "checkbox") {
-                valueToWrite = element.checked;
-            } else if ((element.type == "radio") && (element.checked)) {
-                valueToWrite = element.value;
-            } else {
-                return; // "checked" binding only responds to checkboxes and selected radio buttons
-            }
-
-            var modelValue = valueAccessor(), unwrappedValue = ko.utils.unwrapObservable(modelValue);
-            if ((element.type == "checkbox") && (unwrappedValue instanceof Array)) {
-                // For checkboxes bound to an array, we add/remove the checkbox value to that array
-                // This works for both observable and non-observable arrays
-                var existingEntryIndex = ko.utils.arrayIndexOf(unwrappedValue, element.value);
-                if (element.checked && (existingEntryIndex < 0))
-                    modelValue.push(element.value);
-                else if ((!element.checked) && (existingEntryIndex >= 0))
-                    modelValue.splice(existingEntryIndex, 1);
-            } else {
-                ko.expressionRewriting.writeValueToProperty(modelValue, allBindingsAccessor, 'checked', valueToWrite, true);
-            }
-        };
-        ko.utils.registerEventHandler(element, "click", updateHandler);
-
-        // IE 6 won't allow radio buttons to be selected unless they have a name
-        if ((element.type == "radio") && !element.name)
-            ko.bindingHandlers['uniqueName']['init'](element, function() { return true });
-    },
-    'update': function (element, valueAccessor) {
-        var value = ko.utils.unwrapObservable(valueAccessor());
-
-        if (element.type == "checkbox") {
-            if (value instanceof Array) {
-                // When bound to an array, the checkbox being checked represents its value being present in that array
-                element.checked = ko.utils.arrayIndexOf(value, element.value) >= 0;
-            } else {
-                // When bound to anything other value (not an array), the checkbox being checked represents the value being trueish
-                element.checked = value;
-            }
-        } else if (element.type == "radio") {
-            element.checked = (element.value == value);
-        }
-    }
-};
-var classesWrittenByBindingKey = '__ko__cssValue';
-ko.bindingHandlers['css'] = {
-    'update': function (element, valueAccessor) {
-        var value = ko.utils.unwrapObservable(valueAccessor());
-        if (typeof value == "object") {
-            for (var className in value) {
-                var shouldHaveClass = ko.utils.unwrapObservable(value[className]);
-                ko.utils.toggleDomNodeCssClass(element, className, shouldHaveClass);
-            }
-        } else {
-            value = String(value || ''); // Make sure we don't try to store or set a non-string value
-            ko.utils.toggleDomNodeCssClass(element, element[classesWrittenByBindingKey], false);
-            element[classesWrittenByBindingKey] = value;
-            ko.utils.toggleDomNodeCssClass(element, value, true);
-        }
-    }
-};
-ko.bindingHandlers['enable'] = {
-    'update': function (element, valueAccessor) {
-        var value = ko.utils.unwrapObservable(valueAccessor());
-        if (value && element.disabled)
-            element.removeAttribute("disabled");
-        else if ((!value) && (!element.disabled))
-            element.disabled = true;
-    }
-};
-
-ko.bindingHandlers['disable'] = {
-    'update': function (element, valueAccessor) {
-        ko.bindingHandlers['enable']['update'](element, function() { return !ko.utils.unwrapObservable(valueAccessor()) });
-    }
-};
-// For certain common events (currently just 'click'), allow a simplified data-binding syntax
-// e.g. click:handler instead of the usual full-length event:{click:handler}
-function makeEventHandlerShortcut(eventName) {
-    ko.bindingHandlers[eventName] = {
-        'init': function(element, valueAccessor, allBindingsAccessor, viewModel) {
-            var newValueAccessor = function () {
-                var result = {};
-                result[eventName] = valueAccessor();
-                return result;
-            };
-            return ko.bindingHandlers['event']['init'].call(this, element, newValueAccessor, allBindingsAccessor, viewModel);
-        }
-    }
-}
-
-ko.bindingHandlers['event'] = {
-    'init' : function (element, valueAccessor, allBindingsAccessor, viewModel) {
-        var eventsToHandle = valueAccessor() || {};
-        for(var eventNameOutsideClosure in eventsToHandle) {
-            (function() {
-                var eventName = eventNameOutsideClosure; // Separate variable to be captured by event handler closure
-                if (typeof eventName == "string") {
-                    ko.utils.registerEventHandler(element, eventName, function (event) {
-                        var handlerReturnValue;
-                        var handlerFunction = valueAccessor()[eventName];
-                        if (!handlerFunction)
-                            return;
-                        var allBindings = allBindingsAccessor();
-
-                        try {
-                            // Take all the event args, and prefix with the viewmodel
-                            var argsForHandler = ko.utils.makeArray(arguments);
-                            argsForHandler.unshift(viewModel);
-                            handlerReturnValue = handlerFunction.apply(viewModel, argsForHandler);
-                        } finally {
-                            if (handlerReturnValue !== true) { // Normally we want to prevent default action. Developer can override this be explicitly returning true.
-                                if (event.preventDefault)
-                                    event.preventDefault();
-                                else
-                                    event.returnValue = false;
-                            }
-                        }
-
-                        var bubble = allBindings[eventName + 'Bubble'] !== false;
-                        if (!bubble) {
-                            event.cancelBubble = true;
-                            if (event.stopPropagation)
-                                event.stopPropagation();
-                        }
-                    });
-                }
-            })();
-        }
-    }
-};
-// "foreach: someExpression" is equivalent to "template: { foreach: someExpression }"
-// "foreach: { data: someExpression, afterAdd: myfn }" is equivalent to "template: { foreach: someExpression, afterAdd: myfn }"
-ko.bindingHandlers['foreach'] = {
-    makeTemplateValueAccessor: function(valueAccessor) {
-        return function() {
-            var modelValue = valueAccessor(),
-                unwrappedValue = ko.utils.peekObservable(modelValue);    // Unwrap without setting a dependency here
-
-            // If unwrappedValue is the array, pass in the wrapped value on its own
-            // The value will be unwrapped and tracked within the template binding
-            // (See https://github.com/SteveSanderson/knockout/issues/523)
-            if ((!unwrappedValue) || typeof unwrappedValue.length == "number")
-                return { 'foreach': modelValue, 'templateEngine': ko.nativeTemplateEngine.instance };
-
-            // If unwrappedValue.data is the array, preserve all relevant options and unwrap again value so we get updates
-            ko.utils.unwrapObservable(modelValue);
-            return {
-                'foreach': unwrappedValue['data'],
-                'as': unwrappedValue['as'],
-                'includeDestroyed': unwrappedValue['includeDestroyed'],
-                'afterAdd': unwrappedValue['afterAdd'],
-                'beforeRemove': unwrappedValue['beforeRemove'],
-                'afterRender': unwrappedValue['afterRender'],
-                'beforeMove': unwrappedValue['beforeMove'],
-                'afterMove': unwrappedValue['afterMove'],
-                'templateEngine': ko.nativeTemplateEngine.instance
-            };
-        };
-    },
-    'init': function(element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
-        return ko.bindingHandlers['template']['init'](element, ko.bindingHandlers['foreach'].makeTemplateValueAccessor(valueAccessor));
-    },
-    'update': function(element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
-        return ko.bindingHandlers['template']['update'](element, ko.bindingHandlers['foreach'].makeTemplateValueAccessor(valueAccessor), allBindingsAccessor, viewModel, bindingContext);
-    }
-};
-ko.expressionRewriting.bindingRewriteValidators['foreach'] = false; // Can't rewrite control flow bindings
-ko.virtualElements.allowedBindings['foreach'] = true;
-var hasfocusUpdatingProperty = '__ko_hasfocusUpdating';
-ko.bindingHandlers['hasfocus'] = {
-    'init': function(element, valueAccessor, allBindingsAccessor) {
-        var handleElementFocusChange = function(isFocused) {
-            // Where possible, ignore which event was raised and determine focus state using activeElement,
-            // as this avoids phantom focus/blur events raised when changing tabs in modern browsers.
-            // However, not all KO-targeted browsers (Firefox 2) support activeElement. For those browsers,
-            // prevent a loss of focus when changing tabs/windows by setting a flag that prevents hasfocus
-            // from calling 'blur()' on the element when it loses focus.
-            // Discussion at https://github.com/SteveSanderson/knockout/pull/352
-            element[hasfocusUpdatingProperty] = true;
-            var ownerDoc = element.ownerDocument;
-            if ("activeElement" in ownerDoc) {
-                isFocused = (ownerDoc.activeElement === element);
-            }
-            var modelValue = valueAccessor();
-            ko.expressionRewriting.writeValueToProperty(modelValue, allBindingsAccessor, 'hasfocus', isFocused, true);
-            element[hasfocusUpdatingProperty] = false;
-        };
-        var handleElementFocusIn = handleElementFocusChange.bind(null, true);
-        var handleElementFocusOut = handleElementFocusChange.bind(null, false);
-
-        ko.utils.registerEventHandler(element, "focus", handleElementFocusIn);
-        ko.utils.registerEventHandler(element, "focusin", handleElementFocusIn); // For IE
-        ko.utils.registerEventHandler(element, "blur",  handleElementFocusOut);
-        ko.utils.registerEventHandler(element, "focusout",  handleElementFocusOut); // For IE
-    },
-    'update': function(element, valueAccessor) {
-        var value = ko.utils.unwrapObservable(valueAccessor());
-        if (!element[hasfocusUpdatingProperty]) {
-            value ? element.focus() : element.blur();
-            ko.dependencyDetection.ignore(ko.utils.triggerEvent, null, [element, value ? "focusin" : "focusout"]); // For IE, which doesn't reliably fire "focus" or "blur" events synchronously
-        }
-    }
-};
-ko.bindingHandlers['html'] = {
-    'init': function() {
-        // Prevent binding on the dynamically-injected HTML (as developers are unlikely to expect that, and it has security implications)
-        return { 'controlsDescendantBindings': true };
-    },
-    'update': function (element, valueAccessor) {
-        // setHtml will unwrap the value if needed
-        ko.utils.setHtml(element, valueAccessor());
-    }
-};
-var withIfDomDataKey = '__ko_withIfBindingData';
-// Makes a binding like with or if
-function makeWithIfBinding(bindingKey, isWith, isNot, makeContextCallback) {
-    ko.bindingHandlers[bindingKey] = {
-        'init': function(element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
-            ko.utils.domData.set(element, withIfDomDataKey, {});
-            return { 'controlsDescendantBindings': true };
-        },
-        'update': function(element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
-            var withIfData = ko.utils.domData.get(element, withIfDomDataKey),
-                dataValue = ko.utils.unwrapObservable(valueAccessor()),
-                shouldDisplay = !isNot !== !dataValue, // equivalent to isNot ? !dataValue : !!dataValue
-                isFirstRender = !withIfData.savedNodes,
-                needsRefresh = isFirstRender || isWith || (shouldDisplay !== withIfData.didDisplayOnLastUpdate);
-
-            if (needsRefresh) {
-                if (isFirstRender) {
-                    withIfData.savedNodes = ko.utils.cloneNodes(ko.virtualElements.childNodes(element), true /* shouldCleanNodes */);
-                }
-
-                if (shouldDisplay) {
-                    if (!isFirstRender) {
-                        ko.virtualElements.setDomNodeChildren(element, ko.utils.cloneNodes(withIfData.savedNodes));
-                    }
-                    ko.applyBindingsToDescendants(makeContextCallback ? makeContextCallback(bindingContext, dataValue) : bindingContext, element);
-                } else {
-                    ko.virtualElements.emptyNode(element);
-                }
-
-                withIfData.didDisplayOnLastUpdate = shouldDisplay;
-            }
-        }
-    };
-    ko.expressionRewriting.bindingRewriteValidators[bindingKey] = false; // Can't rewrite control flow bindings
-    ko.virtualElements.allowedBindings[bindingKey] = true;
-}
-
-// Construct the actual binding handlers
-makeWithIfBinding('if');
-makeWithIfBinding('ifnot', false /* isWith */, true /* isNot */);
-makeWithIfBinding('with', true /* isWith */, false /* isNot */,
-    function(bindingContext, dataValue) {
-        return bindingContext['createChildContext'](dataValue);
-    }
-);
-function ensureDropdownSelectionIsConsistentWithModelValue(element, modelValue, preferModelValue) {
-    if (preferModelValue) {
-        if (modelValue !== ko.selectExtensions.readValue(element))
-            ko.selectExtensions.writeValue(element, modelValue);
-    }
-
-    // No matter which direction we're syncing in, we want the end result to be equality between dropdown value and model value.
-    // If they aren't equal, either we prefer the dropdown value, or the model value couldn't be represented, so either way,
-    // change the model value to match the dropdown.
-    if (modelValue !== ko.selectExtensions.readValue(element))
-        ko.dependencyDetection.ignore(ko.utils.triggerEvent, null, [element, "change"]);
-};
-
-ko.bindingHandlers['options'] = {
-    'update': function (element, valueAccessor, allBindingsAccessor) {
-        if (ko.utils.tagNameLower(element) !== "select")
-            throw new Error("options binding applies only to SELECT elements");
-
-        var selectWasPreviouslyEmpty = element.length == 0;
-        var previousSelectedValues = ko.utils.arrayMap(ko.utils.arrayFilter(element.childNodes, function (node) {
-            return node.tagName && (ko.utils.tagNameLower(node) === "option") && node.selected;
-        }), function (node) {
-            return ko.selectExtensions.readValue(node) || node.innerText || node.textContent;
-        });
-        var previousScrollTop = element.scrollTop;
-
-        var value = ko.utils.unwrapObservable(valueAccessor());
-        var selectedValue = element.value;
-
-        // Remove all existing <option>s.
-        // Need to use .remove() rather than .removeChild() for <option>s otherwise IE behaves oddly (https://github.com/SteveSanderson/knockout/issues/134)
-        while (element.length > 0) {
-            ko.cleanNode(element.options[0]);
-            element.remove(0);
-        }
-
-        if (value) {
-            var allBindings = allBindingsAccessor(),
-                includeDestroyed = allBindings['optionsIncludeDestroyed'];
-
-            if (typeof value.length != "number")
-                value = [value];
-            if (allBindings['optionsCaption']) {
-                var option = document.createElement("option");
-                ko.utils.setHtml(option, allBindings['optionsCaption']);
-                ko.selectExtensions.writeValue(option, undefined);
-                element.appendChild(option);
-            }
-
-            for (var i = 0, j = value.length; i < j; i++) {
-                // Skip destroyed items
-                var arrayEntry = value[i];
-                if (arrayEntry && arrayEntry['_destroy'] && !includeDestroyed)
-                    continue;
-
-                var option = document.createElement("option");
-
-                function applyToObject(object, predicate, defaultValue) {
-                    var predicateType = typeof predicate;
-                    if (predicateType == "function")    // Given a function; run it against the data value
-                        return predicate(object);
-                    else if (predicateType == "string") // Given a string; treat it as a property name on the data value
-                        return object[predicate];
-                    else                                // Given no optionsText arg; use the data value itself
-                        return defaultValue;
-                }
-
-                // Apply a value to the option element
-                var optionValue = applyToObject(arrayEntry, allBindings['optionsValue'], arrayEntry);
-                ko.selectExtensions.writeValue(option, ko.utils.unwrapObservable(optionValue));
-
-                // Apply some text to the option element
-                var optionText = applyToObject(arrayEntry, allBindings['optionsText'], optionValue);
-                ko.utils.setTextContent(option, optionText);
-
-                element.appendChild(option);
-            }
-
-            // IE6 doesn't like us to assign selection to OPTION nodes before they're added to the document.
-            // That's why we first added them without selection. Now it's time to set the selection.
-            var newOptions = element.getElementsByTagName("option");
-            var countSelectionsRetained = 0;
-            for (var i = 0, j = newOptions.length; i < j; i++) {
-                if (ko.utils.arrayIndexOf(previousSelectedValues, ko.selectExtensions.readValue(newOptions[i])) >= 0) {
-                    ko.utils.setOptionNodeSelectionState(newOptions[i], true);
-                    countSelectionsRetained++;
-                }
-            }
-
-            element.scrollTop = previousScrollTop;
-
-            if (selectWasPreviouslyEmpty && ('value' in allBindings)) {
-                // Ensure consistency between model value and selected option.
-                // If the dropdown is being populated for the first time here (or was otherwise previously empty),
-                // the dropdown selection state is meaningless, so we preserve the model value.
-                ensureDropdownSelectionIsConsistentWithModelValue(element, ko.utils.peekObservable(allBindings['value']), /* preferModelValue */ true);
-            }
-
-            // Workaround for IE9 bug
-            ko.utils.ensureSelectElementIsRenderedCorrectly(element);
-        }
-    }
-};
-ko.bindingHandlers['options'].optionValueDomDataKey = '__ko.optionValueDomData__';
-ko.bindingHandlers['selectedOptions'] = {
-    'init': function (element, valueAccessor, allBindingsAccessor) {
-        ko.utils.registerEventHandler(element, "change", function () {
-            var value = valueAccessor(), valueToWrite = [];
-            ko.utils.arrayForEach(element.getElementsByTagName("option"), function(node) {
-                if (node.selected)
-                    valueToWrite.push(ko.selectExtensions.readValue(node));
-            });
-            ko.expressionRewriting.writeValueToProperty(value, allBindingsAccessor, 'value', valueToWrite);
-        });
-    },
-    'update': function (element, valueAccessor) {
-        if (ko.utils.tagNameLower(element) != "select")
-            throw new Error("values binding applies only to SELECT elements");
-
-        var newValue = ko.utils.unwrapObservable(valueAccessor());
-        if (newValue && typeof newValue.length == "number") {
-            ko.utils.arrayForEach(element.getElementsByTagName("option"), function(node) {
-                var isSelected = ko.utils.arrayIndexOf(newValue, ko.selectExtensions.readValue(node)) >= 0;
-                ko.utils.setOptionNodeSelectionState(node, isSelected);
-            });
-        }
-    }
-};
-ko.bindingHandlers['style'] = {
-    'update': function (element, valueAccessor) {
-        var value = ko.utils.unwrapObservable(valueAccessor() || {});
-        for (var styleName in value) {
-            if (typeof styleName == "string") {
-                var styleValue = ko.utils.unwrapObservable(value[styleName]);
-                element.style[styleName] = styleValue || ""; // Empty string removes the value, whereas null/undefined have no effect
-            }
-        }
-    }
-};
-ko.bindingHandlers['submit'] = {
-    'init': function (element, valueAccessor, allBindingsAccessor, viewModel) {
-        if (typeof valueAccessor() != "function")
-            throw new Error("The value for a submit binding must be a function");
-        ko.utils.registerEventHandler(element, "submit", function (event) {
-            var handlerReturnValue;
-            var value = valueAccessor();
-            try { handlerReturnValue = value.call(viewModel, element); }
-            finally {
-                if (handlerReturnValue !== true) { // Normally we want to prevent default action. Developer can override this be explicitly returning true.
-                    if (event.preventDefault)
-                        event.preventDefault();
-                    else
-                        event.returnValue = false;
-                }
-            }
-        });
-    }
-};
-ko.bindingHandlers['text'] = {
-    'update': function (element, valueAccessor) {
-        ko.utils.setTextContent(element, valueAccessor());
-    }
-};
-ko.virtualElements.allowedBindings['text'] = true;
-ko.bindingHandlers['uniqueName'] = {
-    'init': function (element, valueAccessor) {
-        if (valueAccessor()) {
-            var name = "ko_unique_" + (++ko.bindingHandlers['uniqueName'].currentIndex);
-            ko.utils.setElementName(element, name);
-        }
-    }
-};
-ko.bindingHandlers['uniqueName'].currentIndex = 0;
-ko.bindingHandlers['value'] = {
-    'init': function (element, valueAccessor, allBindingsAccessor) {
-        // Always catch "change" event; possibly other events too if asked
-        var eventsToCatch = ["change"];
-        var requestedEventsToCatch = allBindingsAccessor()["valueUpdate"];
-        var propertyChangedFired = false;
-        if (requestedEventsToCatch) {
-            if (typeof requestedEventsToCatch == "string") // Allow both individual event names, and arrays of event names
-                requestedEventsToCatch = [requestedEventsToCatch];
-            ko.utils.arrayPushAll(eventsToCatch, requestedEventsToCatch);
-            eventsToCatch = ko.utils.arrayGetDistinctValues(eventsToCatch);
-        }
-
-        var valueUpdateHandler = function() {
-            propertyChangedFired = false;
-            var modelValue = valueAccessor();
-            var elementValue = ko.selectExtensions.readValue(element);
-            ko.expressionRewriting.writeValueToProperty(modelValue, allBindingsAccessor, 'value', elementValue);
-        }
-
-        // Workaround for https://github.com/SteveSanderson/knockout/issues/122
-        // IE doesn't fire "change" events on textboxes if the user selects a value from its autocomplete list
-        var ieAutoCompleteHackNeeded = ko.utils.ieVersion && element.tagName.toLowerCase() == "input" && element.type == "text"
-                                       && element.autocomplete != "off" && (!element.form || element.form.autocomplete != "off");
-        if (ieAutoCompleteHackNeeded && ko.utils.arrayIndexOf(eventsToCatch, "propertychange") == -1) {
-            ko.utils.registerEventHandler(element, "propertychange", function () { propertyChangedFired = true });
-            ko.utils.registerEventHandler(element, "blur", function() {
-                if (propertyChangedFired) {
-                    valueUpdateHandler();
-                }
-            });
-        }
-
-        ko.utils.arrayForEach(eventsToCatch, function(eventName) {
-            // The syntax "after<eventname>" means "run the handler asynchronously after the event"
-            // This is useful, for example, to catch "keydown" events after the browser has updated the control
-            // (otherwise, ko.selectExtensions.readValue(this) will receive the control's value *before* the key event)
-            var handler = valueUpdateHandler;
-            if (ko.utils.stringStartsWith(eventName, "after")) {
-                handler = function() { setTimeout(valueUpdateHandler, 0) };
-                eventName = eventName.substring("after".length);
-            }
-            ko.utils.registerEventHandler(element, eventName, handler);
-        });
-    },
-    'update': function (element, valueAccessor) {
-        var valueIsSelectOption = ko.utils.tagNameLower(element) === "select";
-        var newValue = ko.utils.unwrapObservable(valueAccessor());
-        var elementValue = ko.selectExtensions.readValue(element);
-        var valueHasChanged = (newValue != elementValue);
-
-        // JavaScript's 0 == "" behavious is unfortunate here as it prevents writing 0 to an empty text box (loose equality suggests the values are the same).
-        // We don't want to do a strict equality comparison as that is more confusing for developers in certain cases, so we specifically special case 0 != "" here.
-        if ((newValue === 0) && (elementValue !== 0) && (elementValue !== "0"))
-            valueHasChanged = true;
-
-        if (valueHasChanged) {
-            var applyValueAction = function () { ko.selectExtensions.writeValue(element, newValue); };
-            applyValueAction();
-
-            // Workaround for IE6 bug: It won't reliably apply values to SELECT nodes during the same execution thread
-            // right after you've changed the set of OPTION nodes on it. So for that node type, we'll schedule a second thread
-            // to apply the value as well.
-            var alsoApplyAsynchronously = valueIsSelectOption;
-            if (alsoApplyAsynchronously)
-                setTimeout(applyValueAction, 0);
-        }
-
-        // If you try to set a model value that can't be represented in an already-populated dropdown, reject that change,
-        // because you're not allowed to have a model value that disagrees with a visible UI selection.
-        if (valueIsSelectOption && (element.length > 0))
-            ensureDropdownSelectionIsConsistentWithModelValue(element, newValue, /* preferModelValue */ false);
-    }
-};
-ko.bindingHandlers['visible'] = {
-    'update': function (element, valueAccessor) {
-        var value = ko.utils.unwrapObservable(valueAccessor());
-        var isCurrentlyVisible = !(element.style.display == "none");
-        if (value && !isCurrentlyVisible)
-            element.style.display = "";
-        else if ((!value) && isCurrentlyVisible)
-            element.style.display = "none";
-    }
-};
-// 'click' is just a shorthand for the usual full-length event:{click:handler}
-makeEventHandlerShortcut('click');
-// If you want to make a custom template engine,
-//
-// [1] Inherit from this class (like ko.nativeTemplateEngine does)
-// [2] Override 'renderTemplateSource', supplying a function with this signature:
-//
-//        function (templateSource, bindingContext, options) {
-//            // - templateSource.text() is the text of the template you should render
-//            // - bindingContext.$data is the data you should pass into the template
-//            //   - you might also want to make bindingContext.$parent, bindingContext.$parents,
-//            //     and bindingContext.$root available in the template too
-//            // - options gives you access to any other properties set on "data-bind: { template: options }"
-//            //
-//            // Return value: an array of DOM nodes
-//        }
-//
-// [3] Override 'createJavaScriptEvaluatorBlock', supplying a function with this signature:
-//
-//        function (script) {
-//            // Return value: Whatever syntax means "Evaluate the JavaScript statement 'script' and output the result"
-//            //               For example, the jquery.tmpl template engine converts 'someScript' to '${ someScript }'
-//        }
-//
-//     This is only necessary if you want to allow data-bind attributes to reference arbitrary template variables.
-//     If you don't want to allow that, you can set the property 'allowTemplateRewriting' to false (like ko.nativeTemplateEngine does)
-//     and then you don't need to override 'createJavaScriptEvaluatorBlock'.
-
-ko.templateEngine = function () { };
-
-ko.templateEngine.prototype['renderTemplateSource'] = function (templateSource, bindingContext, options) {
-    throw new Error("Override renderTemplateSource");
-};
-
-ko.templateEngine.prototype['createJavaScriptEvaluatorBlock'] = function (script) {
-    throw new Error("Override createJavaScriptEvaluatorBlock");
-};
-
-ko.templateEngine.prototype['makeTemplateSource'] = function(template, templateDocument) {
-    // Named template
-    if (typeof template == "string") {
-        templateDocument = templateDocument || document;
-        var elem = templateDocument.getElementById(template);
-        if (!elem)
-            throw new Error("Cannot find template with ID " + template);
-        return new ko.templateSources.domElement(elem);
-    } else if ((template.nodeType == 1) || (template.nodeType == 8)) {
-        // Anonymous template
-        return new ko.templateSources.anonymousTemplate(template);
-    } else
-        throw new Error("Unknown template type: " + template);
-};
-
-ko.templateEngine.prototype['renderTemplate'] = function (template, bindingContext, options, templateDocument) {
-    var templateSource = this['makeTemplateSource'](template, templateDocument);
-    return this['renderTemplateSource'](templateSource, bindingContext, options);
-};
-
-ko.templateEngine.prototype['isTemplateRewritten'] = function (template, templateDocument) {
-    // Skip rewriting if requested
-    if (this['allowTemplateRewriting'] === false)
-        return true;
-    return this['makeTemplateSource'](template, templateDocument)['data']("isRewritten");
-};
-
-ko.templateEngine.prototype['rewriteTemplate'] = function (template, rewriterCallback, templateDocument) {
-    var templateSource = this['makeTemplateSource'](template, templateDocument);
-    var rewritten = rewriterCallback(templateSource['text']());
-    templateSource['text'](rewritten);
-    templateSource['data']("isRewritten", true);
-};
-
-ko.exportSymbol('templateEngine', ko.templateEngine);
-
-ko.templateRewriting = (function () {
-    var memoizeDataBindingAttributeSyntaxRegex = /(<[a-z]+\d*(\s+(?!data-bind=)[a-z0-9\-]+(=(\"[^\"]*\"|\'[^\']*\'))?)*\s+)data-bind=(["'])([\s\S]*?)\5/gi;
-    var memoizeVirtualContainerBindingSyntaxRegex = /<!--\s*ko\b\s*([\s\S]*?)\s*-->/g;
-
-    function validateDataBindValuesForRewriting(keyValueArray) {
-        var allValidators = ko.expressionRewriting.bindingRewriteValidators;
-        for (var i = 0; i < keyValueArray.length; i++) {
-            var key = keyValueArray[i]['key'];
-            if (allValidators.hasOwnProperty(key)) {
-                var validator = allValidators[key];
-
-                if (typeof validator === "function") {
-                    var possibleErrorMessage = validator(keyValueArray[i]['value']);
-                    if (possibleErrorMessage)
-                        throw new Error(possibleErrorMessage);
-                } else if (!validator) {
-                    throw new Error("This template engine does not support the '" + key + "' binding within its templates");
-                }
-            }
-        }
-    }
-
-    function constructMemoizedTagReplacement(dataBindAttributeValue, tagToRetain, templateEngine) {
-        var dataBindKeyValueArray = ko.expressionRewriting.parseObjectLiteral(dataBindAttributeValue);
-        validateDataBindValuesForRewriting(dataBindKeyValueArray);
-        var rewrittenDataBindAttributeValue = ko.expressionRewriting.preProcessBindings(dataBindKeyValueArray);
-
-        // For no obvious reason, Opera fails to evaluate rewrittenDataBindAttributeValue unless it's wrapped in an additional
-        // anonymous function, even though Opera's built-in debugger can evaluate it anyway. No other browser requires this
-        // extra indirection.
-        var applyBindingsToNextSiblingScript =
-            "ko.__tr_ambtns(function($context,$element){return(function(){return{ " + rewrittenDataBindAttributeValue + " } })()})";
-        return templateEngine['createJavaScriptEvaluatorBlock'](applyBindingsToNextSiblingScript) + tagToRetain;
-    }
-
-    return {
-        ensureTemplateIsRewritten: function (template, templateEngine, templateDocument) {
-            if (!templateEngine['isTemplateRewritten'](template, templateDocument))
-                templateEngine['rewriteTemplate'](template, function (htmlString) {
-                    return ko.templateRewriting.memoizeBindingAttributeSyntax(htmlString, templateEngine);
-                }, templateDocument);
-        },
-
-        memoizeBindingAttributeSyntax: function (htmlString, templateEngine) {
-            return htmlString.replace(memoizeDataBindingAttributeSyntaxRegex, function () {
-                return constructMemoizedTagReplacement(/* dataBindAttributeValue: */ arguments[6], /* tagToRetain: */ arguments[1], templateEngine);
-            }).replace(memoizeVirtualContainerBindingSyntaxRegex, function() {
-                return constructMemoizedTagReplacement(/* dataBindAttributeValue: */ arguments[1], /* tagToRetain: */ "<!-- ko -->", templateEngine);
-            });
-        },
-
-        applyMemoizedBindingsToNextSibling: function (bindings) {
-            return ko.memoization.memoize(function (domNode, bindingContext) {
-                if (domNode.nextSibling)
-                    ko.applyBindingsToNode(domNode.nextSibling, bindings, bindingContext);
-            });
-        }
-    }
-})();
-
-
-// Exported only because it has to be referenced by string lookup from within rewritten template
-ko.exportSymbol('__tr_ambtns', ko.templateRewriting.applyMemoizedBindingsToNextSibling);
-(function() {
-    // A template source represents a read/write way of accessing a template. This is to eliminate the need for template loading/saving
-    // logic to be duplicated in every template engine (and means they can all work with anonymous templates, etc.)
-    //
-    // Two are provided by default:
-    //  1. ko.templateSources.domElement       - reads/writes the text content of an arbitrary DOM element
-    //  2. ko.templateSources.anonymousElement - uses ko.utils.domData to read/write text *associated* with the DOM element, but
-    //                                           without reading/writing the actual element text content, since it will be overwritten
-    //                                           with the rendered template output.
-    // You can implement your own template source if you want to fetch/store templates somewhere other than in DOM elements.
-    // Template sources need to have the following functions:
-    //   text() 			- returns the template text from your storage location
-    //   text(value)		- writes the supplied template text to your storage location
-    //   data(key)			- reads values stored using data(key, value) - see below
-    //   data(key, value)	- associates "value" with this template and the key "key". Is used to store information like "isRewritten".
-    //
-    // Optionally, template sources can also have the following functions:
-    //   nodes()            - returns a DOM element containing the nodes of this template, where available
-    //   nodes(value)       - writes the given DOM element to your storage location
-    // If a DOM element is available for a given template source, template engines are encouraged to use it in preference over text()
-    // for improved speed. However, all templateSources must supply text() even if they don't supply nodes().
-    //
-    // Once you've implemented a templateSource, make your template engine use it by subclassing whatever template engine you were
-    // using and overriding "makeTemplateSource" to return an instance of your custom template source.
-
-    ko.templateSources = {};
-
-    // ---- ko.templateSources.domElement -----
-
-    ko.templateSources.domElement = function(element) {
-        this.domElement = element;
-    }
-
-    ko.templateSources.domElement.prototype['text'] = function(/* valueToWrite */) {
-        var tagNameLower = ko.utils.tagNameLower(this.domElement),
-            elemContentsProperty = tagNameLower === "script" ? "text"
-                                 : tagNameLower === "textarea" ? "value"
-                                 : "innerHTML";
-
-        if (arguments.length == 0) {
-            return this.domElement[elemContentsProperty];
-        } else {
-            var valueToWrite = arguments[0];
-            if (elemContentsProperty === "innerHTML")
-                ko.utils.setHtml(this.domElement, valueToWrite);
-            else
-                this.domElement[elemContentsProperty] = valueToWrite;
-        }
-    };
-
-    ko.templateSources.domElement.prototype['data'] = function(key /*, valueToWrite */) {
-        if (arguments.length === 1) {
-            return ko.utils.domData.get(this.domElement, "templateSourceData_" + key);
-        } else {
-            ko.utils.domData.set(this.domElement, "templateSourceData_" + key, arguments[1]);
-        }
-    };
-
-    // ---- ko.templateSources.anonymousTemplate -----
-    // Anonymous templates are normally saved/retrieved as DOM nodes through "nodes".
-    // For compatibility, you can also read "text"; it will be serialized from the nodes on demand.
-    // Writing to "text" is still supported, but then the template data will not be available as DOM nodes.
-
-    var anonymousTemplatesDomDataKey = "__ko_anon_template__";
-    ko.templateSources.anonymousTemplate = function(element) {
-        this.domElement = element;
-    }
-    ko.templateSources.anonymousTemplate.prototype = new ko.templateSources.domElement();
-    ko.templateSources.anonymousTemplate.prototype['text'] = function(/* valueToWrite */) {
-        if (arguments.length == 0) {
-            var templateData = ko.utils.domData.get(this.domElement, anonymousTemplatesDomDataKey) || {};
-            if (templateData.textData === undefined && templateData.containerData)
-                templateData.textData = templateData.containerData.innerHTML;
-            return templateData.textData;
-        } else {
-            var valueToWrite = arguments[0];
-            ko.utils.domData.set(this.domElement, anonymousTemplatesDomDataKey, {textData: valueToWrite});
-        }
-    };
-    ko.templateSources.domElement.prototype['nodes'] = function(/* valueToWrite */) {
-        if (arguments.length == 0) {
-            var templateData = ko.utils.domData.get(this.domElement, anonymousTemplatesDomDataKey) || {};
-            return templateData.containerData;
-        } else {
-            var valueToWrite = arguments[0];
-            ko.utils.domData.set(this.domElement, anonymousTemplatesDomDataKey, {containerData: valueToWrite});
-        }
-    };
-
-    ko.exportSymbol('templateSources', ko.templateSources);
-    ko.exportSymbol('templateSources.domElement', ko.templateSources.domElement);
-    ko.exportSymbol('templateSources.anonymousTemplate', ko.templateSources.anonymousTemplate);
-})();
-(function () {
-    var _templateEngine;
-    ko.setTemplateEngine = function (templateEngine) {
-        if ((templateEngine != undefined) && !(templateEngine instanceof ko.templateEngine))
-            throw new Error("templateEngine must inherit from ko.templateEngine");
-        _templateEngine = templateEngine;
-    }
-
-    function invokeForEachNodeOrCommentInContinuousRange(firstNode, lastNode, action) {
-        var node, nextInQueue = firstNode, firstOutOfRangeNode = ko.virtualElements.nextSibling(lastNode);
-        while (nextInQueue && ((node = nextInQueue) !== firstOutOfRangeNode)) {
-            nextInQueue = ko.virtualElements.nextSibling(node);
-            if (node.nodeType === 1 || node.nodeType === 8)
-                action(node);
-        }
-    }
-
-    function activateBindingsOnContinuousNodeArray(continuousNodeArray, bindingContext) {
-        // To be used on any nodes that have been rendered by a template and have been inserted into some parent element
-        // Walks through continuousNodeArray (which *must* be continuous, i.e., an uninterrupted sequence of sibling nodes, because
-        // the algorithm for walking them relies on this), and for each top-level item in the virtual-element sense,
-        // (1) Does a regular "applyBindings" to associate bindingContext with this node and to activate any non-memoized bindings
-        // (2) Unmemoizes any memos in the DOM subtree (e.g., to activate bindings that had been memoized during template rewriting)
-
-        if (continuousNodeArray.length) {
-            var firstNode = continuousNodeArray[0], lastNode = continuousNodeArray[continuousNodeArray.length - 1];
-
-            // Need to applyBindings *before* unmemoziation, because unmemoization might introduce extra nodes (that we don't want to re-bind)
-            // whereas a regular applyBindings won't introduce new memoized nodes
-            invokeForEachNodeOrCommentInContinuousRange(firstNode, lastNode, function(node) {
-                ko.applyBindings(bindingContext, node);
-            });
-            invokeForEachNodeOrCommentInContinuousRange(firstNode, lastNode, function(node) {
-                ko.memoization.unmemoizeDomNodeAndDescendants(node, [bindingContext]);
-            });
-        }
-    }
-
-    function getFirstNodeFromPossibleArray(nodeOrNodeArray) {
-        return nodeOrNodeArray.nodeType ? nodeOrNodeArray
-                                        : nodeOrNodeArray.length > 0 ? nodeOrNodeArray[0]
-                                        : null;
-    }
-
-    function executeTemplate(targetNodeOrNodeArray, renderMode, template, bindingContext, options) {
-        options = options || {};
-        var firstTargetNode = targetNodeOrNodeArray && getFirstNodeFromPossibleArray(targetNodeOrNodeArray);
-        var templateDocument = firstTargetNode && firstTargetNode.ownerDocument;
-        var templateEngineToUse = (options['templateEngine'] || _templateEngine);
-        ko.templateRewriting.ensureTemplateIsRewritten(template, templateEngineToUse, templateDocument);
-        var renderedNodesArray = templateEngineToUse['renderTemplate'](template, bindingContext, options, templateDocument);
-
-        // Loosely check result is an array of DOM nodes
-        if ((typeof renderedNodesArray.length != "number") || (renderedNodesArray.length > 0 && typeof renderedNodesArray[0].nodeType != "number"))
-            throw new Error("Template engine must return an array of DOM nodes");
-
-        var haveAddedNodesToParent = false;
-        switch (renderMode) {
-            case "replaceChildren":
-                ko.virtualElements.setDomNodeChildren(targetNodeOrNodeArray, renderedNodesArray);
-                haveAddedNodesToParent = true;
-                break;
-            case "replaceNode":
-                ko.utils.replaceDomNodes(targetNodeOrNodeArray, renderedNodesArray);
-                haveAddedNodesToParent = true;
-                break;
-            case "ignoreTargetNode": break;
-            default:
-                throw new Error("Unknown renderMode: " + renderMode);
-        }
-
-        if (haveAddedNodesToParent) {
-            activateBindingsOnContinuousNodeArray(renderedNodesArray, bindingContext);
-            if (options['afterRender'])
-                ko.dependencyDetection.ignore(options['afterRender'], null, [renderedNodesArray, bindingContext['$data']]);
-        }
-
-        return renderedNodesArray;
-    }
-
-    ko.renderTemplate = function (template, dataOrBindingContext, options, targetNodeOrNodeArray, renderMode) {
-        options = options || {};
-        if ((options['templateEngine'] || _templateEngine) == undefined)
-            throw new Error("Set a template engine before calling renderTemplate");
-        renderMode = renderMode || "replaceChildren";
-
-        if (targetNodeOrNodeArray) {
-            var firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray);
-
-            var whenToDispose = function () { return (!firstTargetNode) || !ko.utils.domNodeIsAttachedToDocument(firstTargetNode); }; // Passive disposal (on next evaluation)
-            var activelyDisposeWhenNodeIsRemoved = (firstTargetNode && renderMode == "replaceNode") ? firstTargetNode.parentNode : firstTargetNode;
-
-            return ko.dependentObservable( // So the DOM is automatically updated when any dependency changes
-                function () {
-                    // Ensure we've got a proper binding context to work with
-                    var bindingContext = (dataOrBindingContext && (dataOrBindingContext instanceof ko.bindingContext))
-                        ? dataOrBindingContext
-                        : new ko.bindingContext(ko.utils.unwrapObservable(dataOrBindingContext));
-
-                    // Support selecting template as a function of the data being rendered
-                    var templateName = typeof(template) == 'function' ? template(bindingContext['$data'], bindingContext) : template;
-
-                    var renderedNodesArray = executeTemplate(targetNodeOrNodeArray, renderMode, templateName, bindingContext, options);
-                    if (renderMode == "replaceNode") {
-                        targetNodeOrNodeArray = renderedNodesArray;
-                        firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray);
-                    }
-                },
-                null,
-                { disposeWhen: whenToDispose, disposeWhenNodeIsRemoved: activelyDisposeWhenNodeIsRemoved }
-            );
-        } else {
-            // We don't yet have a DOM node to evaluate, so use a memo and render the template later when there is a DOM node
-            return ko.memoization.memoize(function (domNode) {
-                ko.renderTemplate(template, dataOrBindingContext, options, domNode, "replaceNode");
-            });
-        }
-    };
-
-    ko.renderTemplateForEach = function (template, arrayOrObservableArray, options, targetNode, parentBindingContext) {
-        // Since setDomNodeChildrenFromArrayMapping always calls executeTemplateForArrayItem and then
-        // activateBindingsCallback for added items, we can store the binding context in the former to use in the latter.
-        var arrayItemContext;
-
-        // This will be called by setDomNodeChildrenFromArrayMapping to get the nodes to add to targetNode
-        var executeTemplateForArrayItem = function (arrayValue, index) {
-            // Support selecting template as a function of the data being rendered
-            arrayItemContext = parentBindingContext['createChildContext'](ko.utils.unwrapObservable(arrayValue), options['as']);
-            arrayItemContext['$index'] = index;
-            var templateName = typeof(template) == 'function' ? template(arrayValue, arrayItemContext) : template;
-            return executeTemplate(null, "ignoreTargetNode", templateName, arrayItemContext, options);
-        }
-
-        // This will be called whenever setDomNodeChildrenFromArrayMapping has added nodes to targetNode
-        var activateBindingsCallback = function(arrayValue, addedNodesArray, index) {
-            activateBindingsOnContinuousNodeArray(addedNodesArray, arrayItemContext);
-            if (options['afterRender'])
-                options['afterRender'](addedNodesArray, arrayValue);
-        };
-
-        return ko.dependentObservable(function () {
-            var unwrappedArray = ko.utils.unwrapObservable(arrayOrObservableArray) || [];
-            if (typeof unwrappedArray.length == "undefined") // Coerce single value into array
-                unwrappedArray = [unwrappedArray];
-
-            // Filter out any entries marked as destroyed
-            var filteredArray = ko.utils.arrayFilter(unwrappedArray, function(item) {
-                return options['includeDestroyed'] || item === undefined || item === null || !ko.utils.unwrapObservable(item['_destroy']);
-            });
-
-            // Call setDomNodeChildrenFromArrayMapping, ignoring any observables unwrapped within (most likely from a callback function).
-            // If the array items are observables, though, they will be unwrapped in executeTemplateForArrayItem and managed within setDomNodeChildrenFromArrayMapping.
-            ko.dependencyDetection.ignore(ko.utils.setDomNodeChildrenFromArrayMapping, null, [targetNode, filteredArray, executeTemplateForArrayItem, options, activateBindingsCallback]);
-
-        }, null, { disposeWhenNodeIsRemoved: targetNode });
-    };
-
-    var templateComputedDomDataKey = '__ko__templateComputedDomDataKey__';
-    function disposeOldComputedAndStoreNewOne(element, newComputed) {
-        var oldComputed = ko.utils.domData.get(element, templateComputedDomDataKey);
-        if (oldComputed && (typeof(oldComputed.dispose) == 'function'))
-            oldComputed.dispose();
-        ko.utils.domData.set(element, templateComputedDomDataKey, (newComputed && newComputed.isActive()) ? newComputed : undefined);
-    }
-
-    ko.bindingHandlers['template'] = {
-        'init': function(element, valueAccessor) {
-            // Support anonymous templates
-            var bindingValue = ko.utils.unwrapObservable(valueAccessor());
-            if ((typeof bindingValue != "string") && (!bindingValue['name']) && (element.nodeType == 1 || element.nodeType == 8)) {
-                // It's an anonymous template - store the element contents, then clear the element
-                var templateNodes = element.nodeType == 1 ? element.childNodes : ko.virtualElements.childNodes(element),
-                    container = ko.utils.moveCleanedNodesToContainerElement(templateNodes); // This also removes the nodes from their current parent
-                new ko.templateSources.anonymousTemplate(element)['nodes'](container);
-            }
-            return { 'controlsDescendantBindings': true };
-        },
-        'update': function (element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
-            var templateName = ko.utils.unwrapObservable(valueAccessor()),
-                options = {},
-                shouldDisplay = true,
-                dataValue,
-                templateComputed = null;
-
-            if (typeof templateName != "string") {
-                options = templateName;
-                templateName = options['name'];
-
-                // Support "if"/"ifnot" conditions
-                if ('if' in options)
-                    shouldDisplay = ko.utils.unwrapObservable(options['if']);
-                if (shouldDisplay && 'ifnot' in options)
-                    shouldDisplay = !ko.utils.unwrapObservable(options['ifnot']);
-
-                dataValue = ko.utils.unwrapObservable(options['data']);
-            }
-
-            if ('foreach' in options) {
-                // Render once for each data point (treating data set as empty if shouldDisplay==false)
-                var dataArray = (shouldDisplay && options['foreach']) || [];
-                templateComputed = ko.renderTemplateForEach(templateName || element, dataArray, options, element, bindingContext);
-            } else if (!shouldDisplay) {
-                ko.virtualElements.emptyNode(element);
-            } else {
-                // Render once for this single data point (or use the viewModel if no data was provided)
-                var innerBindingContext = ('data' in options) ?
-                    bindingContext['createChildContext'](dataValue, options['as']) :  // Given an explitit 'data' value, we create a child binding context for it
-                    bindingContext;                                                        // Given no explicit 'data' value, we retain the same binding context
-                templateComputed = ko.renderTemplate(templateName || element, innerBindingContext, options, element);
-            }
-
-            // It only makes sense to have a single template computed per element (otherwise which one should have its output displayed?)
-            disposeOldComputedAndStoreNewOne(element, templateComputed);
-        }
-    };
-
-    // Anonymous templates can't be rewritten. Give a nice error message if you try to do it.
-    ko.expressionRewriting.bindingRewriteValidators['template'] = function(bindingValue) {
-        var parsedBindingValue = ko.expressionRewriting.parseObjectLiteral(bindingValue);
-
-        if ((parsedBindingValue.length == 1) && parsedBindingValue[0]['unknown'])
-            return null; // It looks like a string literal, not an object literal, so treat it as a named template (which is allowed for rewriting)
-
-        if (ko.expressionRewriting.keyValueArrayContainsKey(parsedBindingValue, "name"))
-            return null; // Named templates can be rewritten, so return "no error"
-        return "This template engine does not support anonymous templates nested within its templates";
-    };
-
-    ko.virtualElements.allowedBindings['template'] = true;
-})();
-
-ko.exportSymbol('setTemplateEngine', ko.setTemplateEngine);
-ko.exportSymbol('renderTemplate', ko.renderTemplate);
-
-ko.utils.compareArrays = (function () {
-    var statusNotInOld = 'added', statusNotInNew = 'deleted';
-
-    // Simple calculation based on Levenshtein distance.
-    function compareArrays(oldArray, newArray, dontLimitMoves) {
-        oldArray = oldArray || [];
-        newArray = newArray || [];
-
-        if (oldArray.length <= newArray.length)
-            return compareSmallArrayToBigArray(oldArray, newArray, statusNotInOld, statusNotInNew, dontLimitMoves);
-        else
-            return compareSmallArrayToBigArray(newArray, oldArray, statusNotInNew, statusNotInOld, dontLimitMoves);
-    }
-
-    function compareSmallArrayToBigArray(smlArray, bigArray, statusNotInSml, statusNotInBig, dontLimitMoves) {
-        var myMin = Math.min,
-            myMax = Math.max,
-            editDistanceMatrix = [],
-            smlIndex, smlIndexMax = smlArray.length,
-            bigIndex, bigIndexMax = bigArray.length,
-            compareRange = (bigIndexMax - smlIndexMax) || 1,
-            maxDistance = smlIndexMax + bigIndexMax + 1,
-            thisRow, lastRow,
-            bigIndexMaxForRow, bigIndexMinForRow;
-
-        for (smlIndex = 0; smlIndex <= smlIndexMax; smlIndex++) {
-            lastRow = thisRow;
-            editDistanceMatrix.push(thisRow = []);
-            bigIndexMaxForRow = myMin(bigIndexMax, smlIndex + compareRange);
-            bigIndexMinForRow = myMax(0, smlIndex - 1);
-            for (bigIndex = bigIndexMinForRow; bigIndex <= bigIndexMaxForRow; bigIndex++) {
-                if (!bigIndex)
-                    thisRow[bigIndex] = smlIndex + 1;
-                else if (!smlIndex)  // Top row - transform empty array into new array via additions
-                    thisRow[bigIndex] = bigIndex + 1;
-                else if (smlArray[smlIndex - 1] === bigArray[bigIndex - 1])
-                    thisRow[bigIndex] = lastRow[bigIndex - 1];                  // copy value (no edit)
-                else {
-                    var northDistance = lastRow[bigIndex] || maxDistance;       // not in big (deletion)
-                    var westDistance = thisRow[bigIndex - 1] || maxDistance;    // not in small (addition)
-                    thisRow[bigIndex] = myMin(northDistance, westDistance) + 1;
-                }
-            }
-        }
-
-        var editScript = [], meMinusOne, notInSml = [], notInBig = [];
-        for (smlIndex = smlIndexMax, bigIndex = bigIndexMax; smlIndex || bigIndex;) {
-            meMinusOne = editDistanceMatrix[smlIndex][bigIndex] - 1;
-            if (bigIndex && meMinusOne === editDistanceMatrix[smlIndex][bigIndex-1]) {
-                notInSml.push(editScript[editScript.length] = {     // added
-                    'status': statusNotInSml,
-                    'value': bigArray[--bigIndex],
-                    'index': bigIndex });
-            } else if (smlIndex && meMinusOne === editDistanceMatrix[smlIndex - 1][bigIndex]) {
-                notInBig.push(editScript[editScript.length] = {     // deleted
-                    'status': statusNotInBig,
-                    'value': smlArray[--smlIndex],
-                    'index': smlIndex });
-            } else {
-                editScript.push({
-                    'status': "retained",
-                    'value': bigArray[--bigIndex] });
-                --smlIndex;
-            }
-        }
-
-        if (notInSml.length && notInBig.length) {
-            // Set a limit on the number of consecutive non-matching comparisons; having it a multiple of
-            // smlIndexMax keeps the time complexity of this algorithm linear.
-            var limitFailedCompares = smlIndexMax * 10, failedCompares,
-                a, d, notInSmlItem, notInBigItem;
-            // Go through the items that have been added and deleted and try to find matches between them.
-            for (failedCompares = a = 0; (dontLimitMoves || failedCompares < limitFailedCompares) && (notInSmlItem = notInSml[a]); a++) {
-                for (d = 0; notInBigItem = notInBig[d]; d++) {
-                    if (notInSmlItem['value'] === notInBigItem['value']) {
-                        notInSmlItem['moved'] = notInBigItem['index'];
-                        notInBigItem['moved'] = notInSmlItem['index'];
-                        notInBig.splice(d,1);       // This item is marked as moved; so remove it from notInBig list
-                        failedCompares = d = 0;     // Reset failed compares count because we're checking for consecutive failures
-                        break;
-                    }
-                }
-                failedCompares += d;
-            }
-        }
-        return editScript.reverse();
-    }
-
-    return compareArrays;
-})();
-
-ko.exportSymbol('utils.compareArrays', ko.utils.compareArrays);
-
-(function () {
-    // Objective:
-    // * Given an input array, a container DOM node, and a function from array elements to arrays of DOM nodes,
-    //   map the array elements to arrays of DOM nodes, concatenate together all these arrays, and use them to populate the container DOM node
-    // * Next time we're given the same combination of things (with the array possibly having mutated), update the container DOM node
-    //   so that its children is again the concatenation of the mappings of the array elements, but don't re-map any array elements that we
-    //   previously mapped - retain those nodes, and just insert/delete other ones
-
-    // "callbackAfterAddingNodes" will be invoked after any "mapping"-generated nodes are inserted into the container node
-    // You can use this, for example, to activate bindings on those nodes.
-
-    function fixUpNodesToBeMovedOrRemoved(contiguousNodeArray) {
-        // Before moving, deleting, or replacing a set of nodes that were previously outputted by the "map" function, we have to reconcile
-        // them against what is in the DOM right now. It may be that some of the nodes have already been removed from the document,
-        // or that new nodes might have been inserted in the middle, for example by a binding. Also, there may previously have been
-        // leading comment nodes (created by rewritten string-based templates) that have since been removed during binding.
-        // So, this function translates the old "map" output array into its best guess of what set of current DOM nodes should be removed.
-        //
-        // Rules:
-        //   [A] Any leading nodes that aren't in the document any more should be ignored
-        //       These most likely correspond to memoization nodes that were already removed during binding
-        //       See https://github.com/SteveSanderson/knockout/pull/440
-        //   [B] We want to output a contiguous series of nodes that are still in the document. So, ignore any nodes that
-        //       have already been removed, and include any nodes that have been inserted among the previous collection
-
-        // Rule [A]
-        while (contiguousNodeArray.length && !ko.utils.domNodeIsAttachedToDocument(contiguousNodeArray[0]))
-            contiguousNodeArray.splice(0, 1);
-
-        // Rule [B]
-        if (contiguousNodeArray.length > 1) {
-            // Build up the actual new contiguous node set
-            var current = contiguousNodeArray[0], last = contiguousNodeArray[contiguousNodeArray.length - 1], newContiguousSet = [current];
-            while (current !== last) {
-                current = current.nextSibling;
-                if (!current) // Won't happen, except if the developer has manually removed some DOM elements (then we're in an undefined scenario)
-                    return;
-                newContiguousSet.push(current);
-            }
-
-            // ... then mutate the input array to match this.
-            // (The following line replaces the contents of contiguousNodeArray with newContiguousSet)
-            Array.prototype.splice.apply(contiguousNodeArray, [0, contiguousNodeArray.length].concat(newContiguousSet));
-        }
-        return contiguousNodeArray;
-    }
-
-    function mapNodeAndRefreshWhenChanged(containerNode, mapping, valueToMap, callbackAfterAddingNodes, index) {
-        // Map this array value inside a dependentObservable so we re-map when any dependency changes
-        var mappedNodes = [];
-        var dependentObservable = ko.dependentObservable(function() {
-            var newMappedNodes = mapping(valueToMap, index) || [];
-
-            // On subsequent evaluations, just replace the previously-inserted DOM nodes
-            if (mappedNodes.length > 0) {
-                ko.utils.replaceDomNodes(fixUpNodesToBeMovedOrRemoved(mappedNodes), newMappedNodes);
-                if (callbackAfterAddingNodes)
-                    ko.dependencyDetection.ignore(callbackAfterAddingNodes, null, [valueToMap, newMappedNodes, index]);
-            }
-
-            // Replace the contents of the mappedNodes array, thereby updating the record
-            // of which nodes would be deleted if valueToMap was itself later removed
-            mappedNodes.splice(0, mappedNodes.length);
-            ko.utils.arrayPushAll(mappedNodes, newMappedNodes);
-        }, null, { disposeWhenNodeIsRemoved: containerNode, disposeWhen: function() { return (mappedNodes.length == 0) || !ko.utils.domNodeIsAttachedToDocument(mappedNodes[0]) } });
-        return { mappedNodes : mappedNodes, dependentObservable : (dependentObservable.isActive() ? dependentObservable : undefined) };
-    }
-
-    var lastMappingResultDomDataKey = "setDomNodeChildrenFromArrayMapping_lastMappingResult";
-
-    ko.utils.setDomNodeChildrenFromArrayMapping = function (domNode, array, mapping, options, callbackAfterAddingNodes) {
-        // Compare the provided array against the previous one
-        array = array || [];
-        options = options || {};
-        var isFirstExecution = ko.utils.domData.get(domNode, lastMappingResultDomDataKey) === undefined;
-        var lastMappingResult = ko.utils.domData.get(domNode, lastMappingResultDomDataKey) || [];
-        var lastArray = ko.utils.arrayMap(lastMappingResult, function (x) { return x.arrayEntry; });
-        var editScript = ko.utils.compareArrays(lastArray, array);
-
-        // Build the new mapping result
-        var newMappingResult = [];
-        var lastMappingResultIndex = 0;
-        var newMappingResultIndex = 0;
-
-        var nodesToDelete = [];
-        var itemsToProcess = [];
-        var itemsForBeforeRemoveCallbacks = [];
-        var itemsForMoveCallbacks = [];
-        var itemsForAfterAddCallbacks = [];
-        var mapData;
-
-        function itemMovedOrRetained(editScriptIndex, oldPosition) {
-            mapData = lastMappingResult[oldPosition];
-            if (newMappingResultIndex !== oldPosition)
-                itemsForMoveCallbacks[editScriptIndex] = mapData;
-            // Since updating the index might change the nodes, do so before calling fixUpNodesToBeMovedOrRemoved
-            mapData.indexObservable(newMappingResultIndex++);
-            fixUpNodesToBeMovedOrRemoved(mapData.mappedNodes);
-            newMappingResult.push(mapData);
-            itemsToProcess.push(mapData);
-        }
-
-        function callCallback(callback, items) {
-            if (callback) {
-                for (var i = 0, n = items.length; i < n; i++) {
-                    if (items[i]) {
-                        ko.utils.arrayForEach(items[i].mappedNodes, function(node) {
-                            callback(node, i, items[i].arrayEntry);
-                        });
-                    }
-                }
-            }
-        }
-
-        for (var i = 0, editScriptItem, movedIndex; editScriptItem = editScript[i]; i++) {
-            movedIndex = editScriptItem['moved'];
-            switch (editScriptItem['status']) {
-                case "deleted":
-                    if (movedIndex === undefined) {
-                        mapData = lastMappingResult[lastMappingResultIndex];
-
-                        // Stop tracking changes to the mapping for these nodes
-                        if (mapData.dependentObservable)
-                            mapData.dependentObservable.dispose();
-
-                        // Queue these nodes for later removal
-                        nodesToDelete.push.apply(nodesToDelete, fixUpNodesToBeMovedOrRemoved(mapData.mappedNodes));
-                        if (options['beforeRemove']) {
-                            itemsForBeforeRemoveCallbacks[i] = mapData;
-                            itemsToProcess.push(mapData);
-                        }
-                    }
-                    lastMappingResultIndex++;
-                    break;
-
-                case "retained":
-                    itemMovedOrRetained(i, lastMappingResultIndex++);
-                    break;
-
-                case "added":
-                    if (movedIndex !== undefined) {
-                        itemMovedOrRetained(i, movedIndex);
-                    } else {
-                        mapData = { arrayEntry: editScriptItem['value'], indexObservable: ko.observable(newMappingResultIndex++) };
-                        newMappingResult.push(mapData);
-                        itemsToProcess.push(mapData);
-                        if (!isFirstExecution)
-                            itemsForAfterAddCallbacks[i] = mapData;
-                    }
-                    break;
-            }
-        }
-
-        // Call beforeMove first before any changes have been made to the DOM
-        callCallback(options['beforeMove'], itemsForMoveCallbacks);
-
-        // Next remove nodes for deleted items (or just clean if there's a beforeRemove callback)
-        ko.utils.arrayForEach(nodesToDelete, options['beforeRemove'] ? ko.cleanNode : ko.removeNode);
-
-        // Next add/reorder the remaining items (will include deleted items if there's a beforeRemove callback)
-        for (var i = 0, nextNode = ko.virtualElements.firstChild(domNode), lastNode, node; mapData = itemsToProcess[i]; i++) {
-            // Get nodes for newly added items
-            if (!mapData.mappedNodes)
-                ko.utils.extend(mapData, mapNodeAndRefreshWhenChanged(domNode, mapping, mapData.arrayEntry, callbackAfterAddingNodes, mapData.indexObservable));
-
-            // Put nodes in the right place if they aren't there already
-            for (var j = 0; node = mapData.mappedNodes[j]; nextNode = node.nextSibling, lastNode = node, j++) {
-                if (node !== nextNode)
-                    ko.virtualElements.insertAfter(domNode, node, lastNode);
-            }
-
-            // Run the callbacks for newly added nodes (for example, to apply bindings, etc.)
-            if (!mapData.initialized && callbackAfterAddingNodes) {
-                callbackAfterAddingNodes(mapData.arrayEntry, mapData.mappedNodes, mapData.indexObservable);
-                mapData.initialized = true;
-            }
-        }
-
-        // If there's a beforeRemove callback, call it after reordering.
-        // Note that we assume that the beforeRemove callback will usually be used to remove the nodes using
-        // some sort of animation, which is why we first reorder the nodes that will be removed. If the
-        // callback instead removes the nodes right away, it would be more efficient to skip reordering them.
-        // Perhaps we'll make that change in the future if this scenario becomes more common.
-        callCallback(options['beforeRemove'], itemsForBeforeRemoveCallbacks);
-
-        // Finally call afterMove and afterAdd callbacks
-        callCallback(options['afterMove'], itemsForMoveCallbacks);
-        callCallback(options['afterAdd'], itemsForAfterAddCallbacks);
-
-        // Store a copy of the array items we just considered so we can difference it next time
-        ko.utils.domData.set(domNode, lastMappingResultDomDataKey, newMappingResult);
-    }
-})();
-
-ko.exportSymbol('utils.setDomNodeChildrenFromArrayMapping', ko.utils.setDomNodeChildrenFromArrayMapping);
-ko.nativeTemplateEngine = function () {
-    this['allowTemplateRewriting'] = false;
-}
-
-ko.nativeTemplateEngine.prototype = new ko.templateEngine();
-ko.nativeTemplateEngine.prototype['renderTemplateSource'] = function (templateSource, bindingContext, options) {
-    var useNodesIfAvailable = !(ko.utils.ieVersion < 9), // IE<9 cloneNode doesn't work properly
-        templateNodesFunc = useNodesIfAvailable ? templateSource['nodes'] : null,
-        templateNodes = templateNodesFunc ? templateSource['nodes']() : null;
-
-    if (templateNodes) {
-        return ko.utils.makeArray(templateNodes.cloneNode(true).childNodes);
-    } else {
-        var templateText = templateSource['text']();
-        return ko.utils.parseHtmlFragment(templateText);
-    }
-};
-
-ko.nativeTemplateEngine.instance = new ko.nativeTemplateEngine();
-ko.setTemplateEngine(ko.nativeTemplateEngine.instance);
-
-ko.exportSymbol('nativeTemplateEngine', ko.nativeTemplateEngine);
-(function() {
-    ko.jqueryTmplTemplateEngine = function () {
-        // Detect which version of jquery-tmpl you're using. Unfortunately jquery-tmpl
-        // doesn't expose a version number, so we have to infer it.
-        // Note that as of Knockout 1.3, we only support jQuery.tmpl 1.0.0pre and later,
-        // which KO internally refers to as version "2", so older versions are no longer detected.
-        var jQueryTmplVersion = this.jQueryTmplVersion = (function() {
-            if ((typeof(jQuery) == "undefined") || !(jQuery['tmpl']))
-                return 0;
-            // Since it exposes no official version number, we use our own numbering system. To be updated as jquery-tmpl evolves.
-            try {
-                if (jQuery['tmpl']['tag']['tmpl']['open'].toString().indexOf('__') >= 0) {
-                    // Since 1.0.0pre, custom tags should append markup to an array called "__"
-                    return 2; // Final version of jquery.tmpl
-                }
-            } catch(ex) { /* Apparently not the version we were looking for */ }
-
-            return 1; // Any older version that we don't support
-        })();
-
-        function ensureHasReferencedJQueryTemplates() {
-            if (jQueryTmplVersion < 2)
-                throw new Error("Your version of jQuery.tmpl is too old. Please upgrade to jQuery.tmpl 1.0.0pre or later.");
-        }
-
-        function executeTemplate(compiledTemplate, data, jQueryTemplateOptions) {
-            return jQuery['tmpl'](compiledTemplate, data, jQueryTemplateOptions);
-        }
-
-        this['renderTemplateSource'] = function(templateSource, bindingContext, options) {
-            options = options || {};
-            ensureHasReferencedJQueryTemplates();
-
-            // Ensure we have stored a precompiled version of this template (don't want to reparse on every render)
-            var precompiled = templateSource['data']('precompiled');
-            if (!precompiled) {
-                var templateText = templateSource['text']() || "";
-                // Wrap in "with($whatever.koBindingContext) { ... }"
-                templateText = "{{ko_with $item.koBindingContext}}" + templateText + "{{/ko_with}}";
-
-                precompiled = jQuery['template'](null, templateText);
-                templateSource['data']('precompiled', precompiled);
-            }
-
-            var data = [bindingContext['$data']]; // Prewrap the data in an array to stop jquery.tmpl from trying to unwrap any arrays
-            var jQueryTemplateOptions = jQuery['extend']({ 'koBindingContext': bindingContext }, options['templateOptions']);
-
-            var resultNodes = executeTemplate(precompiled, data, jQueryTemplateOptions);
-            resultNodes['appendTo'](document.createElement("div")); // Using "appendTo" forces jQuery/jQuery.tmpl to perform necessary cleanup work
-
-            jQuery['fragments'] = {}; // Clear jQuery's fragment cache to avoid a memory leak after a large number of template renders
-            return resultNodes;
-        };
-
-        this['createJavaScriptEvaluatorBlock'] = function(script) {
-            return "{{ko_code ((function() { return " + script + " })()) }}";
-        };
-
-        this['addTemplate'] = function(templateName, templateMarkup) {
-            document.write("<script type='text/html' id='" + templateName + "'>" + templateMarkup + "</script>");
-        };
-
-        if (jQueryTmplVersion > 0) {
-            jQuery['tmpl']['tag']['ko_code'] = {
-                open: "__.push($1 || '');"
-            };
-            jQuery['tmpl']['tag']['ko_with'] = {
-                open: "with($1) {",
-                close: "} "
-            };
-        }
-    };
-
-    ko.jqueryTmplTemplateEngine.prototype = new ko.templateEngine();
-
-    // Use this one by default *only if jquery.tmpl is referenced*
-    var jqueryTmplTemplateEngineInstance = new ko.jqueryTmplTemplateEngine();
-    if (jqueryTmplTemplateEngineInstance.jQueryTmplVersion > 0)
-        ko.setTemplateEngine(jqueryTmplTemplateEngineInstance);
-
-    ko.exportSymbol('jqueryTmplTemplateEngine', ko.jqueryTmplTemplateEngine);
-})();
-});
-})(window,document,navigator,window["jQuery"]);
-})();
\ No newline at end of file