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://596.nicewords.org";  
alt="english web site";  
banner="http://www.nbcash.com/images/nicewords468_60.gif";  
width="468";  
height="60";  
}  
if (ad==2) {  
url="http://www.nbcash.com/?p=40";  
alt="lunarpages hosting";  
banner="http://www.nbcash.com/images/lunarpages468x60.gif";  
width="468";  
height="60";  
}  
if (ad==3) {  
url="http://www.nbcash.com/?p=195";  
alt="backlinks sell links";  
banner="http://www.nbcash.com/images/backlinks468_60.gif";  
width="468";  
height="60";  
}   
document.write('<center>');  
document.write('<a href="' + url + '" target="_top">');  
document.write('<img src="' + banner + '" width=')  
document.write(width + ' height=' + height + ' ');  
document.write('alt="' + alt + '" border=0>');  
document.write('</a>');  
document.write('</center>');