var how_many_ads = 1; 
var now = new Date() 
var sec = now.getSeconds() 
var ad = sec % how_many_ads; 
ad +=1;
if (ad==1) { 
url="http://www.metaleater.com"; 
alt="";
banner="images/banners/bannerads/blank.gif"; 
width="132"; 
height="500"; 
}

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><br>'); 
document.write('</center>');