var total_ads = 3;

var rand_int = Math.random();
var ad = Math.round((total_ads - 1) * rand_int) + 1;

if (ad==1) {
  target_url="http://catalog.osv.com/Catalog.aspx?ProductCode=910";
  alt="Encyclopedia of Catholic Devotions and Practices (click here)";
  banner_url="http://annball.com/images/banners/ab_c468x60.gif";
  width = 468;
  height = 60;
  }
if (ad==2) {
  target_url="http://allstateguard.com/";
  alt="All State Guard Service";
  banner_url="http://annball.com/images/banners/ab_b468x60.gif";
  width = 468;
  height = 60;
  }
if (ad==3) {
  target_url="http://annball.com/heroes";
  alt="A Salute to Our Hometown Heroes (click for details)";
  banner_url="http://annball.com/images/banners/ab_a468x60.gif";
  width = 468;
  height = 60;
  }

document.write('<a href=\"' + target_url + '\" target=\"_top\">');
document.write('<img src=\"' + banner_url + '\" width=');
document.write(width + ' height=' + height + ' ');
document.write('alt=\"' + alt + '\" border=0></a>');