function startmarquee(lh,speed,delay,index){ 
	var t; 
	var p=false; 
	var o=document.getElementById(index); 
	o.innerHTML+=o.innerHTML; 
	o.onmouseover=function(){p=true} 
	o.onmouseout=function(){p=false} 
	o.scrollTop = 0; 
	function start(){ 
	t=setInterval(scrolling,speed); 
	if(!p) o.scrollTop += 2; 
	} 
	function scrolling(){ 
	if(o.scrollTop%lh!=0){ 
	o.scrollTop += 2; 
	if(o.scrollTop>=o.scrollHeight/2) o.scrollTop = 0; 
	}else{ 
	clearInterval(t); 
	setTimeout(start,delay); 
	} 
	} 
	setTimeout(start,delay); 
} 

$(document).ready(function(){
	startmarquee(22,50,3000,'latenews'); 
}); 

/**startmarquee(一次滚动高度,速度,停留时间,图层标记);**/