Logout upon Browser Close - advice only

[condoug]

Hi all

I am writing a PHP CMS and certain parts of it require to be locked out to other users if a user is already accessing that section. I have managed to get all ths working by recording the date/time someone accessed it and the user id of whom is viewing those specific sections. I can clear that locked record IF the user exits the forms via my buttons however I need a solution that would allow me to clear the locked record if the user either:

a) closes the browser

or

b) loses internet connection

Are there any common solutions out there that I could maybe implement? Just the theory behind the process will be sufficient, I don't need any code.

Many Thanks
Doug

[Merter]

There may well be a simpler way, however I'd set a timeout (perhaps 5 minutes?)...

Use AJAX to display a warning if the time left is less than a minute, asking the user if they need more time (still editing the page). Otherwise kill the lock after the initial 5 minutes.

I think Citrix use a system similar to this for their Metaframe login.