JSObject window = JSObject.getWindow(theObject);
 window.call( "methodName", new Object[] {});

public static native void registerJSNIfunctions(Object theObject) /*-{
  parent.methodName= function(s){
    theObject.methodName2(s);
  }
  ;
}-*/;

When calling a javascript from applet this JSException is thrown: No such method "methodName" on JavaScript object I've installed the latest JRE (1.7.0_13) and it works in other browsers, so something has happend in Firefox 18 (I've tested 18.0.1 and 18.0.2 with the same exception). If using JRE 1.7.0_11 (with 1.7.0_13 uninstalled) it works fine. The call from Applet is like this (using netscape.javascript.JSObject): <pre><nowiki>JSObject window = JSObject.getWindow(theObject); window.call( "methodName", new Object[] {});</nowiki></pre> The method "methodName" is available since it works in other browsers but for the information the methods are registered before the Applet is started via this call: <pre><nowiki>public static native void registerJSNIfunctions(Object theObject) /*-{ parent.methodName= function(s){ theObject.methodName2(s); } ; }-*/;</nowiki></pre> What has happend?