1  
   2  tinyMCE.init({
   3     ...
   4     setup : function(ed) {
   5        ed.onInit.add(window.testfunc);
   6        
   7     }
   8  });
   9  
  10  function testfunc()
  11  {
  12     alert('Editor initialized');
  13  
  14     //set content for editor 
  15     var ed = tinyMCE.get('editor');
  16     ed.setContent(hfContent.value);//setting value from hidden field	
  17  }