remove CKEditor from textarea on Click

Is there a way to remove the ckeditor on checking a checkbox?

I need to change the ckeditor to a normal textarea with all the text-content from ckeditor, if a checkbox is clicked. How can I do this?

Here is my part of jQuery code:

$(document).ready(function(){
   $("input[name=template_type]").click(function(){
      if($(this).val()=="pdf"){
         /* THE TEXTAREA SHOULD BE TRANSFORMED TO THE CKEDITOR */
      }else{
         /* THE CKEDITOR SHOULD BE TRANSFORMED TO A TEXTAREA */
      }
   });
});

any ideas?