var speed3=25//速度数值越大速度越慢
var t=false;
var id="aa";
document.getElementById("demo2").innerHTML=document.getElementById("demo1").innerHTML
function Marquee(){
if(document.getElementById("demo2").offsetWidth-document.getElementById("demo").scrollLeft<=0)
document.getElementById("demo").scrollLeft-=document.getElementById("demo1").offsetWidth
else{
document.getElementById("demo").scrollLeft++
}
t=false;
}
function RMarquee(){ 
if(document.getElementById("demo").scrollLeft<=0)
  document.getElementById("demo").scrollLeft+=document.getElementById("demo2").offsetWidth
  else{
  document.getElementById("demo").scrollLeft--
  }
  t=true;
}
function clickdiv(){
clearInterval(MyMar)
Marquee();
}
function Rclickdiv(){
clearInterval(MyMar)
RMarquee();
}
var MyMar=setInterval(Marquee,speed3)
document.getElementById("demo").onmouseover=function() {clearInterval(MyMar)}
document.getElementById("demo").onmouseout=function() {if(t){MyMar=setInterval(RMarquee,speed3)}else{MyMar=setInterval(Marquee,speed3)}}
document.getElementById('mcc').onmouseout=function(){clearInterval(MyMar);MyMar=setInterval(RMarquee,speed3);}
document.getElementById('aa').onmouseout=function(){clearInterval(MyMar);MyMar=setInterval(Marquee,speed3);}