auto log out?

[pujabrang]

hi i just need help that i have set cookies time out very high about 7200 sec because users used to get log out after short time before, which was very irrtating. Now users who have left the forum stays on whos online for long time i know when users log out or click on log out they will b comletely logg out but how many users click on log out button simply they close their browsers. so please how to sort this problem out.is there any mod...there will be!!1i guess
thanks in advance

[Seven Skins]

Reduce the cookie time to 10 minute so that 600 seconds.
Ask you user to check "Remember me" when logging in.

And when user close there browser they will be removed form online users list after 10 minutes.