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Browser close redirect?

rmartes asked
Last Modified: 2012-05-09
Hey Guys,

I have a web app that allows users to login and logout. When the user logs in, the login date/time is recorded in the database. When the user properly logs out (logout button), the logout date/time is also recorded into the db.

Accidently, users might click the X button on the browser and their logout times are not recorded.

How can I detect browser/window close through javascript? OR detect if the user session has been abandoned through ASP.NET VB? so I can record their logout times.
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