You can achieve this my setting a persistent cookie. Mind you though, if you go this path, the user will remain "logged" ( means, even though their session is timed out, you application will be able to recognize them, next time they come around)
unfortunately, persist cookie behavior is removed from
System.Web.Security.FormsAuthentication
. But don't loose a sleep there is a way to achieve what you want. Let this be your guide.
http://geekswithblogs.net/vivek/archive/2006/10/13/93956.aspx[
^]