/*
var speed=5;   
demo2.innerHTML=demo1.innerHTML;  
function Marquee(){ 
if(demo1.offsetWidth==demo.scrollLeft) 
{ 
  demo.scrollLeft=0;   
} 
else 
{ 
  demo.scrollLeft++; 
} 
} 

function stopMove() 
{ 
  clearInterval(MyMar); 
} 

var MyMar=setInterval(Marquee,speed); 
demo.onmouseover=stopMove;  
demo.onmouseout=function() {MyMar=setInterval(Marquee,speed)}
*/

// 附带函数
var
// 用ID获取元素
$ = function(element) {
	return typeof(element) == 'object' ? element : document.getElementById(element);
},
// 生成随机数
RandStr = function(n, u){
	var tmStr = "abcdefghijklmnopqrstuvwxyz0123456789";
	var Len = tmStr.length;
	var Str = "";
	for(i=1;i<n+1;i++){
		Str += tmStr.charAt(Math.random()*Len);
	}
	return (u ? Str.toUpperCase() : Str);
};