Hello in a form with a textarea with id "ckeditor_input"

$("#ckeditor_input").ckeditor();

$("#ckeditor_input").html(); // can get the value

("#ckeditor_input").click/blur/keydown/keypressed(

   function(){
         alert("OK");
  }
); //doesn't work!

the problem is ckeditor! If I don't start an instance of ckeditor on the textarea all events work fine! What is the right way to get events on a ckeditor instance?

Thank you