I have a asp.net(2.0) app and I need to come up with a javascript function that will timeout after a certain time period of inactivity.

To be more specific, if a user has not 1) entered text in a field 2) clicked any links, within the last X minutes, the browser will close.  Could/should this be done like a screensaver where it would be based on keyboard/mouse activity?

Wondering if someone might point me in the right direction.  I’m guessing I would put this code on the master page, but I’m not sure of the best way to incorporate it on all of my other pages.  My thought is putting a timer on the master page and the code on each page or possibly most controls that would basically “reset the timer”.  Is there a better way of doing this?

I would add a javascript function that ticks every second, and a global variable that is a count down.  When ever the page is clicked I would reset the count down variable;

var countDown = 120; //2 minutes 

function startTimer(){

    window.setTimeout ( "timerTick()", 1000);

}

function timerTick(){

     if (countDown == 0){

        window.close();

    return;

    }

    count--;

    window.setTimeout ( "timerTick()", 1000);

}

Hi analogkid

In addition to Aquillin ‘s wonderful code, use 

Instead of window.close();

Why re-invent the wheel? Wouldn't the session timeout variable automatically do that for you? I believe that the default is 20 minutes.
     http://msdn.microsoft.com/en-us/library/ms525473.aspx

And here is a very good example to use it as you describe:
     http://aspalliance.com/1621_Implementing_a_Session_Timeout_Page_in_ASPNET

NC...