var how_many_ads = 3;
var now = new Date()
var sec = now.getSeconds()
var ad = sec % how_many_ads;
ad +=1;

if (ad==1) {
txt=""; 
url="http://www.joestrophies.com";
alt="Joe's Trophies";
banner="http://www.rmrracing.com/2008/images/banners/banner_JoesTrophies.gif";
width="468";
height="60";
}

if (ad==2) {
txt="";
url="http://www.youngauto.net";
alt="Young Chevrolet";
banner="http://www.rmrracing.com/2008/images/banners/bnnr_yag1.gif";
width="468";
height="60";
}


if (ad==3) {
txt=""; 
url="http://www.maverik.com";
alt="Maverik";
banner="http://www.rmrracing.com/2008/images/banners/bnnr_maverik1.gif";
width="468";
height="60";
}


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>');