How to make the AjaxControlToolkit HTmlEditorExtendor ReadOnly and C#?

<script language="javascript" type="text/javascript">
                $(window).bind("load", function () {
              document.getElementById('gvFeedback$ctl02$txtDetails').ReadOnly = true;
    <style type="text/css">
          .containerClass .ajax__html_editor_extender_container
            width: 100% !important;/*important is really important at here*/


  <asp:TextBox runat="server" ID="txtDetails"  TextMode="MultiLine" CssClass="TextBoxEditor"  Text='FeedDetails'   Width="100%" Height="110px"/><br />            
                                      <ajaxToolkit:HtmlEditorExtender ID="htmlEditorExtendertxtDetails"   EnableSanitization="false" DisplaySourceTab="false"
                                      TargetControlID="txtDetails"  runat="server" > </ajaxToolkit:HtmlEditorExtender>
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Be sure to place the following just after the jQuery plugin script and BEFORE ANY OTHER SCRIPT :
<script language="javascript" type="text/javascript">
         $(document).ready("load", function () {
                   $("<%= htmlEditorExtendertxtDetails.ClientID %>").click(function(e) { e.stopImmediatePropagation(); });

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you could also, hide the editor and show a div with the editor content. so that user can only see it, can't edit it.  later you can show the editor base on some condition.
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