var speed = 15;
var step = 1;
var dR = false; // reverse
function objWidth(obj) {
	if(obj.offsetWidth) return obj.offsetWidth;
	if (obj.clip) return obj.clip.width; return 0;
}
function objHeight(obj) {
	if(obj.offsetHeight) return obj.offsetHeight;
	if (obj.clip) return obj.clip.height; return 0;
}
function scrF(i,sH,eH){
	var x=parseInt(i.top)+(dR? step: -step);
	if(dR && x>sH)x=-eH;
	else if(x<2-eH)x=sH;i.top = x+'px';
}
function startScroll(sN){
	var scr=document.getElementById(sN);
	var ct = scr.innerHTML;
	var sW = objWidth(scr)-6;
	var sH = objHeight(scr);
	scr.innerHTML = '<div id="'+sN+'in" style="position:absolute;left:15px;width:'+sW+';">'+ct+'<\/div>';
	var sTxt=document.getElementById(sN+'in');
	var eH=objHeight(sTxt);
	sTxt.style.top=(dR? -eH : sH)+'px';
	sTxt.style.clip='rect(0,'+sW+'px,'+eH+'px,0)';
	setInterval(function() {
		scr.onmouseover = function(){step=0;};
		scr.onmouseout = function(){step=1;};
		scrF(sTxt.style,sH,eH);
	},1000/speed);
}
//window.onload = startScroll('div');