Hi.
I am using my own custom code to create users, log them in etc... but using Forms authentication.

I need the ability to "automatically" logoff a user. There is a process that occurs when the user is "logged off".

Now, when the user logs in, the user object is held in session.

The user can logoff via the site, or when the forms authentication times out, the user is logged off by obtaining the user object in session.

However, if the browser is closed then how can I detect a period of inactivity so then i will have the ability to log off the user?

Javascript/AJAX solutions are not permitted