If a user leaves the secure area of my site without logging off (ie. closes browser or leaves for different site), how do I determine this so I can manually Log them off? I don't want to allow the same user to log in on two different machines so if they're already listed as "logged in" in the database I don't allow them to log in. I can't seem to rely on code in the Session_OnEnd of my Global.asa to log them off because this code doesn't run until the session times out 20 minutes later. Any help would be greatly appreciated. Thanks.