title: File Upload server polling with Progress Bar
body: <p>This is not a duplicate of those questions that ask how to upload a file and display a progress bar. My understanding of the basics is: </p>
  
  <ol>
  <li>We have a form that posts the given input file to the given url. </li>
  <li>As soon as the submit button is clicked, we set interval to run a Javascript method every second, which uses AJAX to poll the server to get the status of this download. </li>
  </ol>
  
  <p>The only dilemma for me here is that I tried this method, but when I look at FireBug console, I can see all these jQuery AJAX calls. I've seen other people's implementation, where you don't see anything in FireBug > Net > XHR.</p>
  
  <p>Does anyone have any ideas how this is implemented?</p>
  
  <p>Any advice would be greatly appreciated.</p>
  
  <p>Cheers,
  Mosh</p>
  
  <p>PS: Just to emphasize, I'm not interested in doing this with Flash. </p>