title: Calendar control is not popping-up when clicked on image
body: <p>I'm using a <code>CalendarExtender</code> control with the help of <code>&lt;img&gt;</code> to populate a <code>TextBox</code> with a date. I am using this in <code>EditItemTemplate</code> of <code>GridView</code>. But when I click on the image, the calendar control is not poping up. </p>
  
  <p>I have used this <code>CalendarExtender</code> control in four or five other places (in this project) also. Everywhere else it is working fine. I have compared the code from the well working version to this code. No difference at all.</p>
  
  <p>I have written the code like below:</p>
  
  <pre><code>&lt;EditItemTemplate&gt;
      &lt;asp:TextBox ID="txtDateDelivered" runat="server" 
                   Text='&lt;%# Bind("DateDelivered","{0:dd/MM/yy}") %&gt;' 
                   CssClass="DateTextBoxInGridView" &gt;
      &lt;/asp:TextBox&gt;
      &lt;asp:CalendarExtender ID="calexDateDelivered" runat="server" 
                            Format="dd/MM/yy" 
                            TargetControlID="txtDateDelivered"
                            PopupButtonID="calDateDelivered"&gt;
      &lt;/asp:CalendarExtender&gt;
      &lt;img src="Images/calendar.gif" 
           id="calDateDelivered" 
           alt="Calendar" /&gt;
  &lt;/EditItemTemplate&gt;
  </code></pre>
  
  <p>Can anybody please tell where could be the problem?</p>