Nice article to auto logout after certain period.

Timeout - Ajax Patterns

Related link

http://radio.javaranch.com/pascarello/2005/07/05/1120592884938.html

http://weblogs.asp.net/traviscollins/archive/2008/02/22/ajax-timeout-server-control.aspx#comments

http://msmvps.com/blogs/shahed/archive/2007/09/05/redirect-to-login-page-on-session-expiration-asp-net.aspx

http://www.stardeveloper.com/articles/display.html?article=2002102501&page=2

http://blogs.msdn.com/nikhiln/archive/2007/06/21/detecting-session-timeout-in-asp-net-2-0-web-applications.aspx

http://aspalliance.com/520_Detecting_ASPNET_Session_Timeouts.1

http://aspalliance.com/520_Detecting_ASPNET_Session_Timeouts.2

http://www.codeproject.com/KB/aspnet/SessionTimeoutOnDNN.aspx

thanks,

Suresh Behera