jQuery.getFeed(options);
  
   参数:
  
   * url: the feed URL (required).
   * data: data to be sent to the server. See jQuery.ajax data property.
   * success: a function to be called if the request succeeds.
     The function gets passed one argument: the JFeed object.
  
   使用示例:
  
   jQuery.getFeed({
       url: 'rss.xml',
       success: function(feed) {
           alert(feed.title);
       }
   });