function adArray() {
 for (i=0; i*2<adArray.arguments.length; i++) {
  this[i] = new Object();
  this[i].src = adArray.arguments[i*2];
  this[i].href = adArray.arguments[i*2+1];
 }
 this.length = i;
}
function getAdNum() {
 dat = new Date();
 dat = (dat.getTime()+"").charAt(8);
 if (dat.length == 1)
  ad_num = dat%ads.length;
 else
  ad_num = 0;
 return ad_num;
}

var ads = new adArray(
"/images/banner1.jpg",
"http://www.adventure-spain.co.uk",
"/images/banner2.jpg",
"http://www.dwsfest.co.uk",
"/images/banner3.jpg",
"http://www.expeditionsforlife.com",
"/images/banner4.jpg",
"http://www.hardrockfest.co.uk",
"/images/banner5.jpg",
"http://www.orangehouseclimbing.co.uk",
"/images/banner6.jpg",
"http://www.explore-the-outdoors.com/"
);

var ad_num = getAdNum();

document.write('<A href="'+ads[ad_num].href+'" target="_blank"><IMG SRC="'+ads[ad_num].src+'" '
+'height="163" width="998" border="0" name="adswap"></a>');

link_num = document.links.length-1;

function rotateSponsor() {
 if (document.images) {
  ad_num = (ad_num+1)%ads.length;
  document.adswap.src = ads[ad_num].src;
  document.links[link_num].href = ads[ad_num].href;
  setTimeout("rotateSponsor()",20000);
 }
}
setTimeout("rotateSponsor()",20000);