LinkTrack = function ()
{
	this.docLinks = document.links;
	this.location = location.pathname;
}

LinkTrack.prototype.updateHrefs = function ()
{
	var currlink, hostname, protocol, linktext;
	if (!(!document.getElementsByTagName && document.all))
	{
		for (var i=0; i<this.docLinks.length; i++)
		{
			currlink = this.docLinks[i];
			hostname = currlink.hostname ? currlink.hostname.toLowerCase() : "";
			protocol = currlink.protocol.toLowerCase();
			linktext = currlink.innerText;
			if (protocol == 'http:' && (hostname != 'bbc.co.uk' && hostname.indexOf('.bbc.co.uk') == -1))
			{
				currlink.href = this.getNewUrl(currlink.href);
				if (document.all && currlink.innerText.toLowerCase() == currlink.href.toLowerCase()) currlink.innerText = linktext;
			}
		}
	}
}

LinkTrack.prototype.getNewUrl = function (destination)
{
	var newUrl = '/go'; 
	newUrl += this.location;
	newUrl += (newUrl.substr(newUrl.length-1) == '/')? 'ext/_auto/-/' : '/ext/_auto/-/';
	newUrl += destination;
	return newUrl;
}

var myC = new LinkTrack();
myC.updateHrefs();