title: OnClientClick fired before ValidationGroup
body: <p>This is the code i'm using:</p>
  
  <pre><code>            &lt;telerik:RadTextBox ID="txtTitre" runat="server" Skin="Windows7" Width="250"&gt;
              &lt;/telerik:RadTextBox&gt;
              &lt;asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="*"
                  ForeColor="Red" ControlToValidate="txtTitre" ValidationGroup="validationincident"&gt;&lt;/asp:RequiredFieldValidator&gt;
  </code></pre>
  
  <p>And my ASP button:</p>
  
  <pre><code>        &lt;asp:Button ID="Button1" runat="server" Text="Soumettre ce ticket" OnClick="Button1_Click"
              OnClientClick="CloseDialog()" UseSubmitBehavior="false" ValidationGroup="validationincident" /&gt;
  </code></pre>
  
  <p>My problem is it seems OnClientClick is fired before ValidationGroup since the JS function called in my OnClientClick Closes my window.</p>
  
  <p>So the window closes and the "*" (error message) is only displayed when i reopen my window.</p>
  
  <p>I need my ValidationGroup to be checked first!
  Thanks in advance for your help</p>