title: setTimeout / clearTimeout problems
body: <p>I try to make a page to go to the startpage after eg. 10sec of inactivity (user not clicking anywhere). I use jQuery for the rest but the set/clear in my test function are pure javascript.</p>
  
  <p>In my frustation I ended up with something like this function that I hoped I could call on any click on the page. The timer starts fine, but is not reset on a click. If the function is called 5 times within the first 10 seconds, then 5 alerts will apear... no clearTimeout...</p>
  
  <pre><code>function endAndStartTimer() {
      window.clearTimeout(timer);
      var timer;
      //var millisecBeforeRedirect = 10000; 
      timer = window.setTimeout(function(){alert('Hello!');},10000); 
  }
  </code></pre>
  
  <p>Any one got some lines of code that will do the trick?
   - on any click stop, reset and start the timer.
   - When timer hits eg. 10sec do something.</p>