//滚动图片-----------------------------

var speed=20; //数字越大速度越慢
var ta_b=document.getElementById("demo");
var ta_b1=document.getElementById("demo1");
var ta_b2=document.getElementById("demo2");
ta_b2.innerHTML=ta_b1.innerHTML;
function Marquee(){
    if(ta_b2.offsetWidth-ta_b.scrollLeft<=0)
        ta_b.scrollLeft-=ta_b1.offsetWidth
    else{
        ta_b.scrollLeft++;
    }
}
var MyMar=setInterval(Marquee,speed);
ta_b.onmouseover=function() {clearInterval(MyMar)};
ta_b.onmouseout=function() {MyMar=setInterval(Marquee,speed)};