function ctRotatorBridgeRss20(url, readyCallback){
 
  this.url = url;
  this.readyCallback = readyCallback;
}

ctRotatorBridgeRss20.prototype = {
  getDataSource:function(){
   var readyCallback = this.readyCallback;
   var dataSource = [];
   $.get(this.url, {}, function(data){
     $(data).find('channel item').each(function(){
	   var e = $(this);
	   dataSource.push({
	     title:e.find('title').text(),
		 url: e.find('link').text(),
		 tip: e.find('description').text()
	   });
	 });
	 readyCallback(dataSource);
   }, 'xml');
   
   return dataSource;
  }
  
};