No Javascript, no event handler, no deleted cookie. Plus unload event handlers are not very reliable. Leaving out the expiration date just works (even with killall -9 $browsername), no need for Javascript.

Alexander

--
Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)

In reply to Re^2: delete cookies when browser window closed by afoken
in thread delete cookies when browser window closed by shan_emails

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