Inactivity timeout javascript

inactivity.js

<script type="text/javascript">
function idleTimer() {
    var t;
    //window.onload = resetTimer;
    window.onmousemove = resetTimer; // catches mouse movements
    window.onmousedown = resetTimer; // catches mouse movements
    window.onclick = resetTimer;     // catches mouse clicks
    window.onscroll = resetTimer;    // catches scrolling
    window.onkeypress = resetTimer;  //catches keyboard actions

    function logout() {
        window.location.href = '/action/logout';  //Adapt to actual logout script
    }

   function reload() {
          window.location = self.location.href;  //Reloads the current page
   }

   function resetTimer() {
        clearTimeout(t);
        t = setTimeout(logout, 1800000);  // time is in milliseconds (1000 is 1 second)
        t= setTimeout(reload, 300000);  // time is in milliseconds (1000 is 1 second)
    }
}
idleTimer();
</script>

@culniga You can use the browser's Page Visibility API instead, its more reliable.

@nexxado, good suggestion:

document.addEventListener('visibilitychange', function () {
    var t;
    if (document.hidden) {
        // start inactivity timeout
        
        function logout(){
            window.location.href = '/logout';
        }
        t = setTimeout(logout, 1800000);
    } else {
        clearTimeout(t);
    }
});

@gerard-kanters
Like some others I found this after hours of fruitless Google searching. Thanks so much, this is working well for me. I have commented out the reload sections though.
How could I alter the code (I'm pretty much a noob in js) so that the code ignores my 'login' page?
Thanks

There's one in my Repo in case someone wants to check.

if the admin wants that on that page he pauses for 15 mins data will be automatically saved into the database then how to identify the page.

I realise this is pretty old but this is awesome, thank you!!