var _context_menu = app.menus.item("$ID/RtMouse?????"); 

#targetengine "session"   
bibPlace();   
  
function bibPlace(){   
   var _context_menu = app.menus.item("$ID/RtMouseLayout");   
  
   var g_action = null;  
   g_action = app.scriptMenuActions.item("Bibliothekselement platzieren");   
   if (g_action == null)  
      g_action = app.scriptMenuActions.add("Bibliothekselement platzieren");   
  
   var _event_listener = g_action.eventListeners.add("onInvoke",  startScript, false);   
   var _sep = _context_menu.menuSeparators.add();  
   var _menu_item = _context_menu.menuItems.add(g_action);   
    } 
 
 
   function startScript(myEvent)  
   {   
     var myFile = File('R:\\Profile\\DTI-Prog\\Taest\\selFromLibPlace.jsx‎'); 
app.doScript(myFile, ScriptLanguage.JAVASCRIPT); 
} 

( function () { 
	for( var i=0; i<app.menus.length; i++ ) { 
		$.writeln(app.findKeyStrings(app.menus.item(i).name)); 
	} 
} )(); 

File("~/Desktop/test.webloc").execute();