title: f:ajax and jquery's `$(document).ajaxStart` dont work together?
body: <p>I'm trying to get a 'loading' div for my ajaxified website.
  using JSF 2.0's <code>f:ajax</code> tag for adding ajax to the website and 'trying' to make the loadin <code>div</code> show using <code>jQuery</code> <code>$(document).ajaxStart</code> function.</p>
  
  <p>The jQuery code part looks like this:</p>
  
  <pre><code>$(document).ajaxStart(function(){
      console.log("ajax start");
    $('#ajaxBusy').show(); 
  }).ajaxStop(function(){
      console.log("ajax end");
    $('#ajaxBusy').hide();
  });
  </code></pre>
  
  <p>The log functions are never called.
  Any Idea why? Do JSF ajax and javascript ajax not work together?</p>
  
  <p>Thanks!</p>