var speed=50; //数字越大速度越慢

var tab=document.getElementById("zjdemo");

var tab1=document.getElementById("zjdemo1");

var tab2=document.getElementById("zjdemo2");

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)};