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Postback and pop-up boxes

Posted By:      Posted Date: October 13, 2010    Points: 0   Category :ASP.Net

 I have created a form.  I have a submit button.  When I click on the button, it performs some validation.  If there is a problem, I want a pop-up box to appear with the error. 

I use the following for the pop-up box:

Response.Write("<Script language=javascript>alert('" & strMsg & "')</Script>")

The problem is that the submit button does a postback and clears the form and does the pop-up box before repainting the screen - so you are looking at a blank screen and a pop-up box.  I want the pop-up box to appear without clearing the screen or after the screen is refreshed.

Can someone help?

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