var MyMar11 = null;
var stop111 = null;
var rollPix = 0;
var scrollHeight = 18 ; //设置滚动高度
var speed11=20; //数字越大速度越慢 
var scrollWait=4000; //滚动间隔时间
var tab11=document.getElementById("webiste2"); 
var tab111=document.getElementById("demo1_website"); 
var tab211=document.getElementById("demo2_website"); 
tab211.innerHTML=tab111.innerHTML;         
function MarqueeWeb(){ 
 
if(tab211.offsetTop - tab11.scrollTop <= 0)//当滚动至demo1与demo2交界时 
{
    tab11.scrollTop = 0;
}
else{ 
tab11.scrollTop+=1; 
if (rollPix % scrollHeight == 0)
{
	rollPix = 0;
	clearInterval(MyMar11);
	stop111 = setInterval(RollStop11,scrollWait);
}
rollPix ++;
} 
} 
 function RollStop11()
{
	 
	clearInterval(stop111);
	MyMar11=setInterval(MarqueeWeb,speed11); 
}
  
MyMar11 = setInterval(MarqueeWeb,speed11);
 tab11.onmouseover=function() 
{
clearInterval(MyMar11);
clearInterval(stop111);
};
//鼠标移上时清除定时器达到滚动停止的目的 
tab11.onmouseout=function() {
 
clearInterval(MyMar11);
clearInterval(stop111);
MyMar11=setInterval(MarqueeWeb,speed11)

};//鼠标移开时重设定时器