title: onfocusin not working for firefox and chrome
body: <p>I have a Javascript running in a page. The following is the code am using.</p>
  
  <pre><code>window.document.onkeydown = keydown;
  function keydown()
  { 
    alert("keydown");
  }
  
   window.document.onfocusin = focussedin ;
   function focussedin ()
  { 
     alert("focus in");
   }
  </code></pre>
  
  <p>Here , If I run the code, I am not getting the focus in alert for firefox and chrome. Whether  window.document.onfocusin will not work in other browsers except IE ?</p>