postback validation causes an alert dialog to be displayed

Hi, For some strange reason an alert dialog with the text title "Message From Web page" and message "-" displays when posting back a for with validation. There are no custom validation scripts that display an alert window. I am debgging javascript using IE development toolbar? Is it possible to break into the code that displays the alert box? so far I have been unable to do so.

Thanks

From stackoverflow

• CTRL-SHIFT-J (also under the Page > Developer > Debug JavaScript menu item) in chrome to debug javascript. Debuggin in chrome is easier than IE

• the validation error was displayed by validation summary control with no display. Thanks for taking the time.