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

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