title: Jquery ajax long polling error on Firefox
body: <p>This is my code. It works perfectly with Chrome but when I launch it Firefox it only works at the very first call. When I try to pass data for the second time I get this error:<br>
  "<strong>attempt to run compile-and-go script on a cleared scope</strong>".<br>
  I guess that the problem is in the function call in the "success" parameter, but I cannot understand what's wrong.<br>
  Thank you in advance for your help.</p>
  
  <pre><code>$.noConflict();
  jQuery(document).ready(function(){
  in_poll();
  });  
  
  function in_poll()
      {
      jQuery.ajax(
          {
          url: "prova.php",
          cache: false,
          dataType: "json",
          success: function(data)
              {
              .... OUTPUT DATA RETRIEVED....
              in_poll();
              },        
          error: function (xhr, ajaxOptions, thrownError) 
              {        
              alert(thrownError);
              setTimeout('in_poll()', 5000);//Try againg after 5 seconds
              },
          timeout: 25000
          });  
      }
  </code></pre>