title: Modal Popup Extender Saving Data Causes Page Refresh
body: <p>I have a modal popup extender </p>
  
  <pre><code>  &lt;asp:ModalPopupExtender ID="ModalPopupExtender1" TargetControlID="btnAddNewGuest"     BehaviorID="newGuestPopup"
          PopupControlID="pnlNewGuest" CancelControlID="btnGuestCancel"   BackgroundCssClass="modalBackground"
          DropShadow="false" runat="server"&gt;
      &lt;/asp:ModalPopupExtender&gt;
  </code></pre>
  
  <p>pnlNewGuest contains all textboxes for input, a checkbox and btnSave. btnSave saves data to the server by calling the btnSave_Clicked at code behind. </p>
  
  <p>On Checkbox onclick following jquery is called</p>
  
  <pre><code>    $("#&lt;%=checkbox1.ClientID%&gt;").click(function () {
          if ($("#&lt;%=checkbox1.ClientID%&gt;").is(':checked')) {
             $('#guestdiv1 :input').attr('disabled', true);
          }
          else {
              $('#guestdiv1 :input').attr('disabled', false);
         }
      });
  </code></pre>
  
  <p>Everything is working very smooth. The problem I face when I disable the controls in modal popup screen. The screen scrolls up however data is saved successfully.  </p>