window.addEvent('domready',function() { 
/* settings */
		var list = $('news-feed').getFirst('ul'); 
		var items = list.getElements('li'); 
		var showDuration = 4000; 
		var scrollDuration = 1500; 
		var index = 0; 
		var height = items[0].getSize().y; 
		
		/* action func */ 
						var move = function() { 
										list.set('tween',{ 
										duration: scrollDuration, 
														onComplete: function() { 
																		if(index == items.length - 1) { 
																						index = 0 - 1; list.scrollTo(0,0);
																		}
														}
										}).tween('top',0 - (++index * height)); 
						}; 
		var alreadyRun = false;
		if(alreadyRun!=true){
						alreadyRun = true ;
						move.periodical(showDuration) ; 
		}
});