diff -r b41a01a6d998 -r 9ddce13e8ff9 javaquery/api/src/main/java/org/apidesign/bck2brwsr/htmlpage/Knockout.java
--- a/javaquery/api/src/main/java/org/apidesign/bck2brwsr/htmlpage/Knockout.java	Mon Apr 15 07:08:55 2013 +0200
+++ b/javaquery/api/src/main/java/org/apidesign/bck2brwsr/htmlpage/Knockout.java	Mon Apr 15 18:30:30 2013 +0200
@@ -82,9 +82,18 @@
             + "    ret.toString = function() { return 'KObject' + cnt + ' value: ' + value + ' props: ' + Object.keys(this); };"
             + "    return ret;"
             + "  };"
+            
             + "  scope.KObject.array= function() {"
             + "    return Array.prototype.slice.call(arguments);"
             + "  };"
+            
+            + "  scope.KObject.expose = function(bindings, model, prop, sig) {"
+            + "    bindings[prop] = function(data, ev) {"
+            + "         console.log(\"  callback on prop: \" + prop);"
+            + "      model[sig](data, ev);"
+            + "    };"
+            + "  };"
+            
             + "})(window); window.KObject"
             );
     }
@@ -186,6 +195,8 @@
         try {
             KOProperty kop = new KOProperty(model, strip(getter), strip(setter));
             bnd.call("bnd", ko, bindings, kop, prop, "get", "set", primitive, array);
+            
+            ((JSObject)bindings).setMember("koModel", model);
             LOG.log(Level.INFO, "binding defined for {0}: {1}", new Object[]{prop, ((JSObject)bindings).getMember(prop)});
         } catch (Throwable ex) {
             LOG.log(Level.INFO, "binding failed for {0} on {1}", new Object[]{prop, bindings});
@@ -205,6 +216,12 @@
     private static void expose(
         Object bindings, Object model, String prop, String sig
     ) {
+        try {
+            KOFunction f = new KOFunction(model, strip(sig));
+            KObject.call("expose", bindings, f, prop, "call");
+        } catch (Throwable ex) {
+            LOG.log(Level.SEVERE, "Cannot define binding for " + prop + " in model " + model, ex);
+        }
     }
     
     @JavaScriptBody(args = { "bindings" }, body = "ko.applyBindings(bindings);")