<!--


var Thatlayer  = document.getElementById("Thatlayer");
var Datalayer  = document.getElementById("Datalayer");
var speed=35;    
if(Thatlayer.scrollHeight>=Thatlayer.offsetHeight)
Datalayer.innerHTML = Datalayer.innerHTML+ Datalayer.innerHTML   //克隆Datalayer为两个Datalayer
function Marquee(){  
   var remaininghigh=parseInt(Thatlayer.scrollHeight)-parseInt(Thatlayer.scrollTop); 
   if(remaininghigh<=Thatlayer.scrollTop){
     Thatlayer.scrollTop=0; //使Thatlayer处于最顶端--相当于滚动条一下移上最顶端--达到初始状态
   }else{
     Thatlayer.scrollTop++;//被卷去的部分逐渐增加1-----相当于滚动条下拉----相当于文字上移(肉眼效果)
   }
}
var Timer = setInterval(Marquee,speed);        //设置定时器
Thatlayer.onmouseover = function(){clearInterval(Timer);}                  //鼠标经过时清除定时器达到滚动停止的目的
Thatlayer.onmouseout  = function(){Timer = setInterval(Marquee,speed);}    //鼠标移开时重设定时器
-->