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://wma.7yin.com/xiuba_buyaodaolian/"; 
//歌曲路径②                     
var WmaUrl2="http://wma.7yin.com/xiuba_buyaodaolian/";                           
break; 

//服务器二
case 2: 
//歌曲路径①
var WmaUrl1="http://wma.7yin.com/xiuba_buyaodaolian/"; 
//歌曲路径②                    
var WmaUrl2="http://wma.7yin.com/xiuba_buyaodaolian/";                 
break; 
} 
//歌曲路径③(手工添加路径)
var WmaUrl3="http://wma.7yin.com/xiuba_buyaodaolian/";