var   speed=40   
      demo2.innerHTML=demo1.innerHTML   
      function   Marquee(){   
      if(demo2.offsetWidth-demo.scrollLeft<=0)   
      demo.scrollLeft-=demo1.offsetWidth   
      else{   
      demo.scrollLeft++   
      }   
      }   
      var   MyMar=setInterval(Marquee,speed)   
      demo.onmouseover=function()   {clearInterval(MyMar)}   
      demo.onmouseout=function()   {MyMar=setInterval(Marquee,speed)}