DIV (container) with CKEditor - 'make on top' problem

Hello guys!

I have this html node:

html
<div id="wgroup"> <div id="w1"> <textarea id="ckeditor-1"> </textarea> </div> <div id="w2"> <textarea id="ckeditor-2"> </textarea> </div> </div>

when I want to put 'w1' on top by javascript code:

Javascript
var divEl = document.getElementById('w1'); divEl.parentNode.appendChild(divEl);

CKEditor (id - 'ckeditor-1') stops working (text getting blank, buttons are not responding)...

How to solve this?

P.S. Numbers of 'w' is dynamic.

Thanks forward, for any reply!