Session Expires / Infinite Sessions

Nov 17, 2008 at 2:21 PM
Can anyone tell me how to get a facebook session id for a user that does not expire?
I am using the standard code for the user to connect to the facebook, i.e. using the auth_token to create a session, and i get back all the information i need. However after a day or so my users sessionID expires, i would like the user to be able to interact with facebook from my site without having to login into facebook everytime they access my site. Any help would be appreciated.