Session.TimeOut and refresh times

My interest is to guarantee that my users never need to logon again.
Can’t put a session.Timeout to high because of memory on server.
So how can I get the session refreshed before session times out?

Thanks any one

if you keep refreshing your session variables then they are always on the server anyways =P

you'll need to use cookies or some heavy db intensive querying everytime they go to a page validate them with the db query.

I've seen people create a hidden frame in which there was a javascript counter in it. When it reached 18 minutes, it automatically refresh's the page this way the session never times out!

But I'd use unatratnag's approach...I'd go with cookies

Hope this helps!
Sincerely

Vlince