diff -r 9cc253aa9405 -r 6dc2c6c752df rt/launcher/src/main/java/org/apidesign/bck2brwsr/launcher/impl/Console.java
--- a/rt/launcher/src/main/java/org/apidesign/bck2brwsr/launcher/impl/Console.java	Thu Apr 18 16:58:55 2013 +0200
+++ b/rt/launcher/src/main/java/org/apidesign/bck2brwsr/launcher/impl/Console.java	Thu Apr 18 23:09:30 2013 +0200
@@ -36,23 +36,22 @@
 public final class Console {
     public Console() {
     }
-    private static final JSObject CObject;
     
     @JavaScriptBody(args = {"elem", "attr"}, body = 
         "return elem[attr].toString();")
     private static Object getAttr(Object elem, String attr) {
-        return CObject.call("getAttr", elem, attr);
+        return InvokeJS.CObject.call("getAttr", elem, attr);
     }
 
     @JavaScriptBody(args = {"id", "attr", "value"}, body = 
         "window.document.getElementById(id)[attr] = value;")
     private static void setAttr(String id, String attr, Object value) {
-        CObject.call("setAttrId", id, attr, value);
+        InvokeJS.CObject.call("setAttrId", id, attr, value);
     }
     @JavaScriptBody(args = {"elem", "attr", "value"}, body = 
         "elem[attr] = value;")
     private static void setAttr(Object id, String attr, Object value) {
-        CObject.call("setAttr", id, attr, value);
+        InvokeJS.CObject.call("setAttr", id, attr, value);
     }
     
     @JavaScriptBody(args = {}, body = "return; window.close();")
@@ -116,7 +115,7 @@
         
     @JavaScriptBody(args = { "test", "c", "arr" }, body = BEGIN_TEST)
     private static void beginTest(String test, Case c, Object[] arr) {
-        CObject.call("beginTest", test, c, arr);
+        InvokeJS.CObject.call("beginTest", test, c, arr);
     }
     
     private static final String LOAD_TEXT = 
@@ -127,13 +126,17 @@
         + "  if (this.readyState!==4) return;\n"
         + " try {"
         + "  arr[0] = this.responseText;\n"
-        + "  callback.run();\n"
+        + "  callback.run__V();\n"
         + " } catch (e) { alert(e); }"
         + "};"
         + "request.send();";
     @JavaScriptBody(args = { "url", "callback", "arr" }, body = LOAD_TEXT)
     private static void loadText(String url, Runnable callback, String[] arr) throws IOException {
-        CObject.call("loadText", url, new Run(callback), arr);
+        InvokeJS.CObject.call("loadText", url, new Run(callback), arr);
+    }
+    
+    public static void runHarness(String url) throws IOException {
+        new Console().harness(url);
     }
     
     public void harness(String url) throws IOException {
@@ -261,7 +264,7 @@
     @JavaScriptBody(args = {"r", "time"}, body =
         "return window.setTimeout(function() { r.run__V(); }, time);")
     private static Object schedule(Runnable r, int time) {
-        return CObject.call("schedule", new Run(r), time);
+        return InvokeJS.CObject.call("schedule", new Run(r), time);
     }
     
     private static final class Case {
@@ -285,7 +288,11 @@
         }
         
         public int getRequestId() {
-            return (int) value("request", data);
+            Object v = value("request", data);
+            if (v instanceof Number) {
+                return ((Number)v).intValue();
+            }
+            return Integer.parseInt(v.toString());
         }
 
         public String getHtmlFragment() {
@@ -357,7 +364,7 @@
         
         @JavaScriptBody(args = "s", body = "return eval('(' + s + ')');")
         private static Object toJSON(String s) {
-            return CObject.call("toJSON", s);
+            return InvokeJS.CObject.call("toJSON", s);
         }
         
         @JavaScriptBody(args = {"p", "d"}, body = 
@@ -376,26 +383,33 @@
     
     static {
         turnAssetionStatusOn();
+    }
+    
+    private static final class InvokeJS {
+        static final JSObject CObject = initJS();
 
-        WebEngine web = (WebEngine) System.getProperties().get("webEngine");
-        CObject = (JSObject) web.executeScript("(function() {"
-            + "var CObject = {};"
+        @JavaScriptBody(args = {  }, body = "return null;")
+        private static JSObject initJS() {
+            WebEngine web = (WebEngine) System.getProperties().get("webEngine");
+            return (JSObject) web.executeScript("(function() {"
+                + "var CObject = {};"
 
-            + "CObject.getAttr = function(elem, attr) { return elem[attr].toString(); };"
+                + "CObject.getAttr = function(elem, attr) { return elem[attr].toString(); };"
 
-            + "CObject.setAttrId = function(id, attr, value) { window.document.getElementById(id)[attr] = value; };"
-            + "CObject.setAttr = function(elem, attr, value) { elem[attr] = value; };"
+                + "CObject.setAttrId = function(id, attr, value) { window.document.getElementById(id)[attr] = value; };"
+                + "CObject.setAttr = function(elem, attr, value) { elem[attr] = value; };"
 
-            + "CObject.beginTest = function(test, c, arr) {" + safe(BEGIN_TEST) + "};"
+                + "CObject.beginTest = function(test, c, arr) {" + safe(BEGIN_TEST) + "};"
 
-            + "CObject.loadText = function(url, callback, arr) {" + safe(LOAD_TEXT) + "};"
-            
-            + "CObject.schedule = function(r, time) { return window.setTimeout(function() { r.run(); }, time); };"
-            
-            + "CObject.toJSON = function(s) { return eval('(' + s + ')'); };"
+                + "CObject.loadText = function(url, callback, arr) {" + safe(LOAD_TEXT.replace("run__V", "run")) + "};"
 
-            + "return CObject;"
-        + "})(this)");
+                + "CObject.schedule = function(r, time) { return window.setTimeout(function() { r.run(); }, time); };"
+
+                + "CObject.toJSON = function(s) { return eval('(' + s + ')'); };"
+
+                + "return CObject;"
+            + "})(this)");
+        }
     }
     
 }