Javascript force a dialog box to timeout

[Piyush Parmar]

Hi.

I would like to know if it's possible to force a dialog box to
"expire" after so many seconds? The scenario is that I'm holding
various objects in my session. Before it times out, I want to notify
the user to click Okay to save the work now OR click cancel to refresh
the page. What if the user doesn't respond to the dialog box for a
long time and then hits save? Well the session has already timed out!

So, can I have the dialog box appear until the session times out and
then force a refresh without user interaction? I've seen a similar
thing done before on bankOfamerica website, but I'm not sure if it's
with Javascript.

Thanks!