var banners = [
  {src: '/images/banners/aloft-hotels.jpg', url: 'http://www.exclusivehoteloffers.com/alofthotels/'},
  {src: '/images/banners/starwood-group-hotels.jpg', url: 'http://www.starwoodpromos.com/bettertomorrows/'},
  {src: '/images/banners/nikko-hotels.jpg', url: 'http://www.jalhotels.com/information/smart/'},
  {src: '/images/banners/telluride-skiing.jpg', url: 'http://visittelluride.com/telluride/'},
  {src: '/images/banners/heavenly-skiing.jpg', url: 'http://reservations.snow.com/promo.select.asp?packagecode=HVLY_2009_4THFREE_BANNER-ADS&705548'},
]

function insert_banner() {
  b = banners[Math.floor(Math.random() * banners.length)];
  document.writeln("<a href='" + b.url + "' target='out'><img src='" + b.src + "'></a>");
}