Fire Event When User is Idle

// Fire Event When User is Idle
//
// http://css-tricks.com/snippets/jquery/fire-event-when-user-is-idle/
//
// See the two commented lines below, that is
// where you can insert code for things to do when the user goes idle, and
// when the user comes back. Set the idle period on the third line, 1000 = 1
// second.
// 
// This works by using a setTimeout function to fire at the end of the 
// specified seconds. If basically anything happens during that time 
// (the mouse moves, the page is scrolled, or a key is pressed) the 
// timeout period is reset.

idleTimer = null;
idleState = false;
idleWait = 2000;

(function ($) {
  $(document).ready(function () {

    $('*').bind('mousemove keydown scroll', function () {
      clearTimeout(idleTimer);

      if (idleState == true) {
        // Reactivated event
        $("body").append("<p>Welcome Back.</p>");
      }

      idleState = false;
      idleTimer = setTimeout(function () {

        // Idle Event
        $("body").append("<p>You've been idle for " + idleWait / 1000 +
          " seconds.</p>");

        idleState = true;
      }, idleWait);
    });

    $("body").trigger("mousemove");
  });
})(jQuery)