How to initiate AJAX Request with onBlur?

[briankb]

I'm using controls from : RadControls for ASPNET AJAX Q1 2008

I'm creating a registration form and trying to use RADAjaxManager, and RADInput with standard validation controls. Everything is working fine except I need to have the validation run onBlur.

<tr>
    <td class="label">*First Name:</td>
    <td class="field">
        <telerik:RadTextBox runat="server" ID="FirstName" TextMode="SingleLine" Columns="8" MaxLength="20" InvalidStyleDuration="100" Width="145px"/>
    </td>
    <td class="validation">
        <asp:RequiredFieldValidator ID="RequireFirstName" runat="server" ControlToValidate="FirstName" ErrorMessage="First Name is Required" SetFocusOnError="true" Display="Dynamic"></asp:RequiredFieldValidator>
    </td>
</tr>

How do I force the validation when the user leaves the Firstname field (onblur) using RAD Ajax?

[Kiara]

I am not sure whether you can force the validation client-side in this case, however intercepting the onBlur event of RadTextBox and performing ajax request (in ASP.NET AJAX web site) "behind the scenes" may do the trick.

I found this thread in the old Classic forums related to this subject:

http://www.telerik.com/community/forums/thread/b311D-baekga.aspx

Kiara