var speed=1;
demoa2.innerHTML=demoa1.innerHTML;	//克隆demoa1为demoa2
function Marqueea(){
	if(demoa2.offsetWidth  <= demoa.scrollLeft){	//当滚动至demoa1与demoa2交界时
		demoa.scrollLeft = demoa.scrollLeft - demoa1.offsetWidth;		//demoa跳到最顶端
	}
	else{
		demoa.scrollLeft++;
	}
}

var version = "other"
browserName = navigator.appName;   
browserVer = parseInt(navigator.appVersion);

if (browserName == "Netscape" && browserVer >= 3) version = "n3";
else if (browserName == "Netscape" && browserVer < 3) version = "n2";
else if (browserName == "Microsoft Internet Explorer" && browserVer >= 4) version = "e4";
else if (browserName == "Microsoft Internet Explorer" && browserVer < 4) version = "e3";

function marqueea1()
{
	if (version == "e4")
	{
		document.write("<marquee style='BOTTOM: 0px; FONT-WEIGHT: 100px; HEIGHT:300px;  TEXT-ALIGN: left; TOP: 0px' id='newsa' scrollamount='1' scrolldelay='-111' behavior='loop' direction='up' border='0' onmouseover='this.stop()' onmouseout='this.start()'>")
	}
}

var MyMa=setInterval(Marqueea,speed);	//设置定时器
demoa.onmouseover=function() {clearInterval(MyMa);}//鼠标移上时清除定时器达到滚动停止的目的
demoa.onmouseout=function() {MyMa=setInterval(Marqueea,speed);}//鼠标移开时重设定时器