JS-Problem mit 2 Ext (merge)

window.addEventListener("load",sig_windowLoad,true);


//add listener to generate the menu
function sig_windowLoad(){
  document.getElementById("contentAreaContextMenu")
    .addEventListener("popupshowing",sig_menuPopup,false);


  
}


//this is the function that does the menu generation
function sig_menuPopup() {




/*
 * I think this was taken from BBCode extension, 
 *  http://www.jedbrown.net/
 * cheers man :D
 */
  // only do this if it's on a text field
  var cm = gContextMenu;
  document.getElementById("signature-menu").hidden = !cm.onTextInput;


  //generate the menu.
  if (cm.onTextInput){
    sig_setMenu();
  }
}




//sets the menu to the current preferences.
function sig_setMenu(){
   var cm = gContextMenu;
 
  //get the template item
  var menu_template = document.getElementById("sig_menu_item_template");


  
  //empty the list of all previous menu items
  var menu= menu_template.parentNode;
  var children = menu.childNodes;
  var temp;
  for(var i=0; i< children.length-3; i++){ //last 3=template, seperator, edit
    menu.removeChild( children.item(i));
  }
 
  //get the preferences
  var prefservice = 
    Components.classes["@mozilla.org/preferences-service;1"]
    .getService(Components.interfaces.nsIPrefService);   

  var prefs = prefservice.getBranch("");


  //defaults if they don't exist
  var n = "";
  var s = "";
  if (prefs.prefHasUserValue("signature.names")){
    n = prefs.getCharPref("signature.names");
    s = prefs.getCharPref("signature.signatures");
  }


  //split the string into an array of signatures.
  var names= n.split("`");
  var signatures= s.split("`");	  
  var len = names.length;

  for(var i= 0; i<len; i++){
    var new_item = menu_template.cloneNode(true);
    new_item.hidden= false;
    new_item.label= names[i];
    new_item.value= signatures[i];

    menu.insertBefore(new_item, menu_template);
  } 


}




/*
 * this was taken from BBCode extension, 
 *  http://www.jedbrown.net/
 * cheers man :D
 */
function sig_menu_insert(text){


    try {
	var command = "cmd_insertText";
	var controller = 
	    document.commandDispatcher.getControllerForCommand(command);


	if (controller && controller.isCommandEnabled(command)) {
	    controller = 
		controller.QueryInterface(
			  Components.interfaces.nsICommandController
			  );
	    var params = 
		Components.classes["@mozilla.org/embedcomp/command-params;1"];
	    params = 
		params.createInstance(Components.interfaces.nsICommandParams);


	    params.setStringValue("state_data", text);
	    controller.doCommandWithParams(command, params);
	}
    }catch (e) {
	dump("Can't do cmd_insertText! ");
	dump(e+"\n");
    }


}

<?xml version="1.0"?>
<?xml-stylesheet href="chrome://bbcode/skin/bbcode.css" type="text/css"?>
<overlay id="bbcodeOverlay" xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
<script type="application/x-javascript" src="chrome://bbcode/content/bbcode.js"/>


<popup id="contentAreaContextMenu">
  <menu id="context-bbcode" position="3" label="BB-Code" class="menuitem-iconic menu-iconic icon-bbcode16" accesskey="B" >
  <menu id="signature-menu" label="Signatur einfügen" accesskey="S">
    <menupopup >
      <menuitem id="sig_menu_item_template" label="Versteckt" hidden="true" value="static" oncommand="sig_menu_insert(event.target.value);"/>
      <menuseparator/>
      <menuitem id="sig_options" label="Signaturen bearbeiten" oncommand="window.openDialog('chrome://bbcode/content/options.xul','','chrome,all,dependent');"/>
    </menupopup>
  </menu>
</popup>


</overlay>

<?xml version="1.0"?>
<?xml-stylesheet href="chrome://bbcode/skin/bbcode.css" type="text/css"?>
<overlay id="bbcodeOverlay" xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
<script type="application/x-javascript" src="chrome://bbcode/content/bbcode.js"/>
<script type="application/x-javascript" src="chrome://bbcode/content/signatureOverlay.js"/>


<popup id="contentAreaContextMenu">
  <menu id="context-bbcode" position="3" label="BB-Code" class="menuitem-iconic menu-iconic icon-bbcode16" accesskey="B" >
         <menupopup>


           <menu id="signature-menu" 
         	position="3" 
         	label="Signatur einfügen" 
         	accesskey="S"   
         	insertafter="context-selectAll">
             <menupopup >
               <menuitem 
         	  id="sig_menu_item_template" 
         	  label="" 
         	  hidden="true" 
         	  value="static" oncommand="sig_menu_insert(event.target.value);"/>
               <menuseparator/>
               <menuitem 
         	  id="sig_options" 
         	  label="Signaturen bearbeiten" 
         	  oncommand="window.openDialog('chrome://bbcode/content/options.xul','','chrome,all,dependent');"/>
             </menupopup>
           </menu>


         </menupopup>
    </menu>
</popup>


</overlay>