title: jQuery.ajax(): discard slow requests
body: <p>I've build a livesearch with the jQuery.ajax() method. On every keyup events it receives new result data from the server.</p>
  
  <p>The problem is, when I'm typing very fast, e.g. "foobar" and the GET request of "fooba" requires more time than the "foobar" request, the results of "fooba" are shown.</p>
  
  <p>To handle this with the timeout parameter is impossible, I think.</p>
  
  <p>Has anyone an idea how to solve this?</p>