title: Trouble with Ajax toolkit CalendarExtender Crashes IE6
body: <p>I have a weird problem with the CalandarExtender on my web project.
  When someone click on the little calandar icon IE6 crash! 
  I think i properly implemented it </p>
  
  <pre><code>&lt;%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" 
              TagPrefix="cc1" %&gt;
  
  &lt;asp:TextBox ID="txtDateDebut" runat="server"
               CssClass="TextBox"&gt;&lt;/asp:TextBox&gt;  &amp;nbsp;
  &lt;asp:ImageButton ID="txtDateDebutButton" runat="server" 
                   ImageUrl="~/images/16X16_2/cal.gif" /&gt;
   &lt;cc1:CalendarExtender ID="txtDateDebutCalendarExtender" runat="server" 
                         Animated="false" CssClass="Calendar"
                         FirstDayOfWeek="Monday" 
                         Format="dd/MM/yyyy"
                         PopupButtonID="txtDateDebutButton"  
                         TargetControlID="txtDateDebut"&gt;  
   &lt;/cc1:CalendarExtender&gt;
  </code></pre>
  
  <p>On have IE7 it works but it stretch up, on IE6 it freeze the app until its stop without any error message.</p>