How do I fade in ckeditor with jquery?

I am buildin开发者_运维百科g an ajax app, and I want the ckeditor to fade in or out for a nice smooth effect.But no matter what I try, the editor appears or disappears instantly.I use the following code to create the editor, any ideas how to do the fadeIn?

$("#txt_maingb").ckeditor(function(){},{toolbar:myToolbarConfig_FULL});

var textarea = $("#txt_maingb");
textarea.ckeditor(function(){},{toolbar:myToolbarConfig_FULL});
$('#cke_editor1').hide().fadeIn(500);