title: jQuery UI Tabs check return data and and its type
body: <p>I am using jQuery UI 1.10.1 tabs with jQuery 1.9.1.
  I load content via Ajax, it works fine. until users session expire and server return json response with URL to redirect to login page. but i can't check that return data type or return data. 
  I already tested load event and its objects UI and Panel parameters don't give any information what kind of data is returned from server. </p>
  
  <p>when I change server response type to 302 header with path to login page it does not redirect to that page. </p>