How to show the Session Timeout Message in ValidatorCalloutExtender

Hi,

  My requirement is  when  Session time out, "Session is timeout" Message should be shown to user  through  the  ValidatorCalloutExtender and i click the Ok button in the  ValidatorCalloutExtender, the page is redirect to the Login page.

how could i do this one could any body give me a sample code.


thanks and regards
brite.
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