var speed = 1;
demo2.innerHTML = demo1.innerHTML;

function Marquee()
{
	if (demo2.offsetWidth - demo.scrollLeft <= 0)
	{
		demo.scrollLeft-=demo1.offsetWidth
	}
	else
	{
		demo.scrollLeft++
	}
}

var MyMar = setInterval(Marquee, speed)
demo.onmouseover=function() {clearInterval(MyMar)}
demo.onmouseout=function() {MyMar=setInterval(Marquee, speed)}