/*
var how_many_ads = 3
var now = new Date() 
var sec = now.getSeconds() 
var ad = sec % how_many_ads; 
ad +=1; 
 
if (ad==1){ 
url="http://item.taobao.com/item.htm?id=8895179953"; 
alt="B族维生素片";  
banner="http://www.qweyy.com/images/ad_img/bzu.gif"; 
width="700"; 
height="60"; 
} 
if (ad==2) {   
url="http://item.taobao.com/item.htm?id=9705763817"; 
alt="酵母多糖胶囊";  
banner="http://www.qweyy.com/images/ad_img/jmdt.gif";  
width="700"; 
height="60"; 
} 
/*
if (ad==3) { 
url="http://25552.taobao.com/"; 
alt="315特别活动"; 
banner="http://www.qweyy.com/images/ad_img/315.gif"; 
width="700"; 
height="60"; 
}
*/
/*
if (ad==3) { 
url="http://item.taobao.com/item.htm?id=9475429757"; 
alt="ad4"; 
banner="http://www.qweyy.com/images/ad_img/putaojiu.gif"; 
width="700"; 
height="60"; 
}  
/*
if (ad==5) { 
url="http://www.sucaibar.com/"; 
alt="ad5"; 
banner="images/05.jpg"; 
width="440"; 
height="230"; 
}  
*/  
/*
document.write('<center>'); 
document.write('<a href=\"' + url + '\" target=\"_blank\">'); 
document.write('<img src=\"' + banner + '\" width=') 
document.write(width + ' height=' + height + ' '); 
document.write('alt=\"' + alt + '\" border=0></a><br>'); 
document.write('</center>'); 
*/