CKEditor focusing instances

HTML

<script src="http://cdnjs.cloudflare.com/ajax/libs/ckeditor/4.2/ckeditor.js"></script>
<div contenteditable="true" id="editable"><img src="http://i.imgur.com/M3LOzdI.jpg"/></div>

<div contenteditable="true" id="editable2"><img src="http://i.imgur.com/aD7V3hQ.jpg" width="320"/></div>

<input type="button" onclick="editor.setReadOnly(true); editor2.setReadOnly(true);" value="Make readonly">

JavaScript

CKEDITOR.disableAutoInline = true;

var editor = CKEDITOR.inline( document.getElementById( 'editable' ) );
var editor2 = CKEDITOR.inline( document.getElementById( 'editable2' ) );