//var speed=15; //数字越大速度越慢
//var tab=document.getElementById("v2demo");
//var tab1=document.getElementById("v2demo1");
//var tab2=document.getElementById("v2demo2");
//tab2.innerHTML=tab1.innerHTML;
//function Marquee(){
////alert(tab.scrollLeft+","+tab2.offsetWidth);
//    if(tab.scrollLeft<=0)
//        tab.scrollLeft+=tab2.offsetWidth
//    else{
//        tab.scrollLeft--
//    }
//}
//var MyMar=setInterval(Marquee,speed);
//tab.onmouseover=function() {clearInterval(MyMar)};
//tab.onmouseout=function() {MyMar=setInterval(Marquee,speed)};


var speed=10; //数字越大速度越慢
var tab=document.getElementById("demo");
var tab1=document.getElementById("demo1");
var tab2=document.getElementById("demo2");
tab2.innerHTML=tab1.innerHTML;
function Marquee(){
if(tab.scrollLeft<=0)
tab.scrollLeft+=tab2.offsetWidth
else{
tab.scrollLeft--
}
}
var MyMar=setInterval(Marquee,speed);
tab.onmouseover=function() {clearInterval(MyMar)};
tab.onmouseout=function() {MyMar=setInterval(Marquee,speed)};