AJAX :: Button Does Not Get Triggered In Modal Popup?

Dec 8, 2010

I have requirement to show alert with cancel and continue button just before two minutes when session is about to get over.Once user clicks continue button session should get extended for 20 minutes and if user clicks cancel then he should logout.I used modal popup to do this..

<
asp:UpdatePanel
ID="UpdatePanel1"
runat="server"> [code]...

I get modal popup at 18 th minutes which is fine.But two button within modal popup does not get fired when I click button.I figured out problem that if the TargetControlID is set to pnlAlert then buttonwithin modal does not work.However if I use another extra button like as follow

<asp:Button
ID="test"
runat="server"[code]....

This button I use to click it to get modal pop up and set TargetControlID to button instead of pnlAlert then OK and cancel button within popup works.But my problem is that I should not explicitly fire this modal popup by clicking button.I should get this popup just before two minute before session is going to expire.So I don't know what should TargetControlId should I set.However complete logic works if I use another button

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