var rollspeed=30
rolllink2.innerHTML=rolllink1.innerHTML //克隆rolllink1为rolllink2
function Marquee(){
if(rolllink2.offsetTop-rolllink.scrollTop<=0) //当滚动至rolllink1与rolllink2交界时
rolllink.scrollTop-=rolllink1.offsetHeight //rolllink跳到最顶端
else{
rolllink.scrollTop++
}
}
var MyMar=setInterval(Marquee,rollspeed) //设置定时器
rolllink.onmouseover=function() {clearInterval(MyMar)}//鼠标移上时清除定时器达到滚动停止的目的
rolllink.onmouseout=function() {MyMar=setInterval(Marquee,rollspeed)}//鼠标移开时重设定时器
-->
