function random_banner(){
  var i=0;
  banners = new Array();
  banners[0] = '<a href="http://sms.crownit.com"><IMG SRC="http://www.crownit.com/banners/sms-banner-inner.gif" WIDTH=200 HEIGHT=245 border=0></a>';
  banners[1] = '<a href="http://www.crownit.com/domains/buy_domain.aspx"><IMG SRC="http://www.crownit.com/banners/domains-inner.gif" WIDTH=200 HEIGHT=245 border=0></a>';
  today = new Date();
  i=today.getSeconds();
  n=banners.length;
  return banners[i-Math.round((i-1)/n)*n];
}