var m=2; //共几个随机显示 
var n=Math.floor(Math.random()*m+1); 
switch(n) 
{ 
//服务器一
case 1: 
//歌曲路径①
var WmaUrl1="http://wmadown.qq654.com/dao-lian-si-quan-jia/mp3/"; 
//歌曲路径②                     
var WmaUrl2="http://wmadown.qq654.com/wma/";                           
break; 

//服务器二
case 2: 
//歌曲路径①
var WmaUrl1="http://wmadown.qq654.com/dao-lian-si-quan-jia/mp3/"; 
//歌曲路径②                    
var WmaUrl2="http://wmadown.qq654.com/wma/";                 
break; 
} 
//歌曲路径③(手工添加路径)
var WmaUrl3="http://mp3.qq163.com/";