        <!--
        var speed=50; //数字越大速度越慢
        var tabss=document.getElementById("demoss");
        var tabss1=document.getElementById("demoss1");
        var tabss2=document.getElementById("demoss2");
        tabss2.innerHTML=tabss1.innerHTML;
        function Marquee(){
        if(tabss2.offsetWidth-tabss.scrollLeft<=0)
        tabss.scrollLeft-=tabss1.offsetWidth
        else{
        tabss.scrollLeft++;
        }
        }
        var MyMar=setInterval(Marquee,speed);
        //tabss.onmouseover=function() {clearInterval(MyMar)};
        //tabss.onmouseout=function() {MyMar=setInterval(Marquee,speed)};
        -->