// JavaScript Document

//向左滚动
function leftscroll(speed,demo){
	var speed=speed;
	var c2 = demo+'1';
	var c3 = demo+'2';
	var scrname=setInterval(Marquee,speed);	
	var demo = document.getElementById(demo);
	var demo1 = document.getElementById(c2);
	var demo2 = document.getElementById(c3);
	demo2.innerHTML=demo1.innerHTML;
	demo.onmouseover=function() {clearInterval(scrname)}
	demo.onmouseout=function() {scrname=setInterval(Marquee,speed);}
	function Marquee(){
	if(demo2.offsetWidth-demo.scrollLeft<=0)
	   demo.scrollLeft-=demo1.offsetWidth;
	else{
	   demo.scrollLeft++;
	}
	}	
}