function _sL(ul, delay, speed, lh) {
	var _sB = (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;
		_sB.scrollTop += 2;	
		if (_sB.scrollTop % lh == 0) {
			clearInterval(tid);
			_sB.appendChild(_sB.getElementsByTagName('ul')[0]);
			_sB.scrollTop = 0;
			setTimeout(start, delay);
		}
	}
	_sB.onmouseover=function(){pause=true;}
	_sB.onmouseout=function(){pause=false;}
	setTimeout(start, delay);
}