Javascript timeout when no actions from user for specified time

Question

I want to call a js function when there is no activity from user on the web page for specified amount of time. If there is activity from user then reset timeout. I tried to

Answer 1

// Using jQuery (but could use pure JS with cross-browser event handlers):
var idleSeconds = 30;

$(function(){
  var idleTimer;
  function resetTimer(){
    clearTimeout(idleTimer);
    idleTimer = setTimeout(whenUserIdle,idleSeconds*1000);
  }
  $(document.body).bind('mousemove keydown click',resetTimer); //space separated events list that we want to monitor
  resetTimer(); // Start the timer when the page loads
});

function whenUserIdle(){
  //...
}

Edit: Not using jQuery for whatever reason? Here's some (untested) code that should be cross-browser clean (to a point; doesn't work on IE5 Mac, for example ;):

attachEvent(window,'load',function(){
  var idleSeconds = 30;
  var idleTimer;
  function resetTimer(){
    clearTimeout(idleTimer);
    idleTimer = setTimeout(whenUserIdle,idleSeconds*1000);
  }
  attachEvent(document.body,'mousemove',resetTimer);
  attachEvent(document.body,'keydown',resetTimer);
  attachEvent(document.body,'click',resetTimer);

  resetTimer(); // Start the timer when the page loads
});

function whenUserIdle(){
  //...
}

function attachEvent(obj,evt,fnc,useCapture){
  if (obj.addEventListener){
    obj.addEventListener(evt,fnc,!!useCapture);
    return true;
  } else if (obj.attachEvent){
    return obj.attachEvent("on"+evt,fnc);
  }
}