function slideLine(ul, delay, speed, lh)  
{
	var slideBox = (typeof ul == 'string')?document.getElementById(ul):ul;
	var delay = delay||1000, speed=speed||20, lh = lh||20;
	var tid = null, pause = false;
	var start = function(){ tid=setInterval(slide, speed);}
	var slide = function() 
	{
		if (pause) return;
		slideBox.scrollTop += 2;
		if (slideBox.scrollTop % lh == 0) 
			{
			clearInterval(tid);
			slideBox.appendChild(slideBox.getElementsByTagName('li')[0]);
			slideBox.scrollTop = 0;
			setTimeout(start, delay);
			}
	}
	slideBox.onmouseover=function(){pause=true;}
	slideBox.onmouseout=function(){pause=false;}
	setTimeout(start, delay);
}