Alert user before session timeout

[Ravi Kiran Va]

Hi ,

Please help me as how can i warn or alert the User , just before his session expires

Inside my web.xml i have configured session time out as

<session-config>    
<session-timeout> 10 </session-timeout> 
 </session-config

At 8 minutes of Idle time , taht is before the session expires How can i warn user or display a Message to the user ??
Please suggest .

Thanks .

[Jaikiran Pai]

A search in this forum returns this http://www.coderanch.com/t/362615/Servlets/java/prompt-user-session-going-time