var t;
var speed=1;
var marquee1=document.getElementById('marquee1');
var demo1=document.getElementById('demo1');
var demo2=document.getElementById('demo2');
function MarqueeTop()
{
    clearTimeout(t);
    if(demo2.offsetTop-marquee1.scrollTop<=0)
        marquee1.scrollTop-=demo1.offsetHeight
    marquee1.scrollTop+=speed;
    t=setTimeout(MarqueeTop,100);
}
function MarqueeDown()
{
    clearTimeout(t);
    if(marquee1.scrollTop<=0)
        marquee1.scrollTop=demo2.offsetHeight;
    marquee1.scrollTop+=speed;
    t=setTimeout(MarqueeDown,200);
}
//if(marquee1.clientHeight<demo1.scrollHeight)
//{
    demo2.innerHTML=demo1.innerHTML;
    MarqueeTop();    
    marquee1.onmouseover=function(){clearTimeout(t);};
    marquee1.onmouseout=function(){t=setTimeout(MarqueeTop,100);};
//}