Set Link Element's Value Manually

 CKEDITOR.on( 'dialogDefinition', function( ev )
   {
      var dialogName = ev.data.name;
      var dialogDefinition = ev.data.definition;
      
      var infoTab = dialogDefinition.getContents( 'info' );
      if (dialogName == 'link'){
         var urlEl = infoTab.get("url");
         
         //i cannot do this.. my problem is here...
         //how can i set a address manually
         urlEl.setValue("http://www.google.com");
         
      }

   });