var how_many_ads = 1; 
var now = new Date() 
var sec = now.getSeconds() 
var ad = sec % how_many_ads; 
ad +=1; 
if (ad==1) { 
txt=""; 
url="http://www.cut.org.br/site/start.cut?infoid=19347&sid=6 "; 
alt="151 e 158 "; 
banner="http://www.cut.org.br/downloads2/images/banners/banner2.gif "; 
width="431"; 
height="68"; 
} 
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('<small>' + txt + '</small></a>'); 
document.write('</center>'); 
// End -->