Web Forms :: Prevent Browser Alert During Close?

Mar 9, 2011

i have issue with browser close prompt;

"the webpage you are viewing is trying to close the window"

in ie6 i prevent this by using coding

self.opener = this;
self.close();

in ie7 and ie8 i prevent this by using coding

window.open('', '_self', '');
window.close();

but, problem is which code will prevent for all brower(ie6,7,8) asking the message.

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