addEvent(window, "load", LoadBanner);

function LoadBanner()
{
  if(document.getElementById){
    var i = document.getElementById('bannerImage');
    var a = document.getElementById('bannerLink');
    var r = Math.floor(Math.random() * banner.length);
    if(r%2)
      r--;

    i.src = banner[r];
    a.href = banner[r + 1];
  }
}

banner = new Array(
  'http://www.bscnc.org/images/banner_caraway.jpg', 'http://www.caraway.org/',
  'http://www.bscnc.org/images/caswellbanner.jpg', 'http://www.fortcaswell.com/',
  'http://www.bscnc.org/images/hollifieldbanner.jpg', 'http://www.hollifield.org/'
);