Session and timeout

[hpl]

I have a session time of 20 min. How do I make an information to the user when the session is exceeded and telling him to login once more?
The way I have done it now only transfers the user to login side, not telling him that the session is exceeded.
This is done applying this code in the web.config:

<authentication mode="Forms"> 
		<forms name=".hpl" loginUrl="login.aspx" protection="All" timeout="20" />
	</authentication>

[venerable bede]

You could create 2 login pages.

The first is the one the users log into initially and the second one containing the message is the one they get redirected to after a session time out.

Probably not the best way to do it but it would be easy to implement and would work.

[hpl]

Hmmm, when using the authentication tag the loginurl will always be shown if you haven't made a succesful login, so I think it's impossibe to have to login pages.