function Marquee(speed,div1,div2,div3){

//var speed=10; //数字越大速度越慢
var tab=document.getElementById(div1);
var tab1=document.getElementById(div2);
var tab2=document.getElementById(div3);
tab2.innerHTML=tab1.innerHTML;
function Marquee(){
if(tab2.offsetWidth-tab.scrollLeft<=0)
tab.scrollLeft-=tab1.offsetWidth
else{
tab.scrollLeft++;
}
}
var MyMar=setInterval(Marquee,speed);
tab.onmouseover=function() {clearInterval(MyMar)};
tab.onmouseout=function() {MyMar=setInterval(Marquee,speed)};

}