// JavaScript Document
  var speed=10//速度数值越大速度越慢
  cases2.innerHTML=cases1.innerHTML
  function Marquee(){
  if(cases2.offsetWidth-cases.scrollLeft<=0)
  cases.scrollLeft-=cases1.offsetWidth
  else{
  cases.scrollLeft++
  }
  }
  var MyMar=setInterval(Marquee,speed)
  cases.onmouseover=function() {clearInterval(MyMar)}
  cases.onmouseout=function() {MyMar=setInterval(Marquee,speed)}