var speed=30;
var demo = document.getElementById("demo");
var demo1 = document.getElementById("demo1");
var demo2 = document.getElementById("demo2");

demo2.innerHTML=demo1.innerHTML;
demo.scrollLeft=demo.scrollWidth;
function Marquee()
{
    if(demo.scrollLeft<=0)
        demo.scrollLeft+=demo2.offsetWidth;
    else
    {
        demo.scrollLeft--;
    }
}
var MyMar=setInterval(Marquee,speed)
demo.onmouseover=function() 
{
    clearInterval(MyMar);
}
demo.onmouseout=function() 
{
    MyMar=setInterval(Marquee,speed);
}