title: Update Panel, confirm button and update progress don't seem to work together
body: <p>At the moment I have no luck trying to get the three of them to work together  and i have had only luck with the updatepanel and update progress nothing the confirm button so far.  </p>
  
  <pre><code>&lt;asp:ScriptManager ID="ScriptManager1" runat="server"&gt;&lt;/asp:ScriptManager&gt;
          &lt;asp:UpdatePanel ID="UpdatePanel1" runat="server"&gt; 
              &lt;ContentTemplate&gt;
                  &lt;asp:Button ID="btnEnter" runat="server" Text="Update" Width="180" Style="margin-left:157px;" 
                      OnClick="btnEnter_Click"  
                      CssClass="button-success pure-button"/&gt;
  
                  &lt;asp:ConfirmButtonExtender ID="ConfirmButtonExtender1" runat="server"
                      TargetControlID="btnEnter"
                      ConfirmText="Do you want to see submit?"
                      ConfirmOnFormSubmit="false"&gt;
                  &lt;/asp:ConfirmButtonExtender&gt; 
              &lt;/ContentTemplate&gt; 
          &lt;/asp:UpdatePanel&gt;
          &lt;asp:UpdateProgress ID="UpdateProgress1" runat="server" AssociatedUpdatePanelID="UpdatePanel1"&gt; 
              &lt;ProgressTemplate&gt; 
                  &lt;div class="overlay"&gt;&lt;/div&gt;
                  &lt;div class="modal"&gt;
                  &lt;h2&gt;Please Wait.....&lt;/h2&gt;
                      &lt;img alt="Loading..." src="/Images/loading.gif" /&gt;
                  &lt;/div&gt;
              &lt;/ProgressTemplate&gt;
          &lt;/asp:UpdateProgress&gt;
  </code></pre>
  
  <p>I have used the javascript function confirm before this and have taken it out
  it was just a onclientclick on the button.<br>
        OnClientClick="return confirm('Are you sure you want to submit?');"
    but I need to check validation of the page first before asking to submit but I am clueless about it.</p>
  
  <p>here's the behind code atm for the button.</p>
  
  <pre><code>protected void btnEnter_Click(object sender, EventArgs e)
      {
          if(Page.IsValid )
          {
          }
      }
  </code></pre>