var speed=50
			fdemo2.innerHTML=fdemo1.innerHTML
			function Marquee(){
			    if(fdemo2.offsetTop-fdemo.scrollTop<=0)
			        fdemo.scrollTop-=fdemo1.offsetHeight
			    else{
			        fdemo.scrollTop++
			    }
			}
			var MyMar=setInterval(Marquee,speed)
			fdemo.onmouseover=function() {clearInterval(MyMar)}
			fdemo.onmouseout=function() {MyMar=setInterval(Marquee,speed)}
   //¹ö¶¯½Å±¾