What you’ll need to do is detect which TextBox raised the event in your initializeRequest handler and target the $get() at the appropriate element accordingly. It’s been a long time since I’ve worked with those events, but I believe the args parameter has a postBackElement property which you can use to determine that. The best thing to do would be using a client-side debugger like Firebug to set a breakpoint in that initializeRequest handler and inspect the value of sender and args when you change the data in one of those fields.

Thank you very much for your reply.

I’ve checked for the possible issues you talked about. I experienced no concurrency issue even if tab through and very quickly complete those three fields. All fields are validated/authenticated successfully isolated and within their scope; no collapse, ambiguity or any other issue at all.

The problem is only with InitializeRequest method, because here we are assigning css class and changing text of all three “authentication message” divs. So, each time, when any of the three fields data is changed, all three divs shows “checking” status. 1 more thing I want to clear, this happens only in “checking” state otherwise it only shows the only 1 corresponding div for “authenticate” or “failed” message, not all 3 divs (as you know we’ve a separate OnTextChanged method for each of the text field and changing only that div’s class and text within that methods, not the other remaining 2).

Can you share some trick to control the “checking” state message?

Thank You,
Mudasser Hassan

If it were me, at this point, I would probably use jQuery Validation’s remote validation feature to validate against a web service or page method. That way, more than a single validation could take place simultaneously.

I’ve tried your User Name checking technique and its perfect. But my requirement is slightly changed. I’ve more than 1 fields on my form to check for availability. I need to check the availability of User Name, Email and Authenticate a Key. I placed the all 3 divs in my form along with corresponding divs and also wrote OnTextChanged events for all 3 fields. Moreover, I’ve done the same in InitializeRequest with other 2 fields like done for User Name. Problem starts here now, as when text changes for any of these 3 fields, all 3 divs go to “checking” state and shows checking status on page. How can I make it to show only corresponding field’s “checking” status and hide the other 2 at that time?

Thank You,
Mudasser Hassan

The easiest solution might be to resize your images to fit the visible area.

It’s a very nice and clean code