var m=3; //共几个Banner随机显示  
var n=Math.floor(Math.random()*m+1)  
switch(n)  
{  
case 1:  
document.writeln("<script type=\'text/javascript\' charset=\'utf-8\' src=\'http://js.tuigoo.com/AShow.aspx?AID=4701\'></script>");
//document.writeln("<script type=\"text/javascript\" src=\"http://123.360kaixin.com/p/i110.js\"></s"+"cript>");
break;  
case 2:  
document.writeln("<script src=\"http://p.qiyou.com/view.php?uid=2117\"></script>");
break; 
case 3:
document.write('<script src="http://code.77union.cn/page/?s=120419"></script>');


break; 
}