function getVar(variable) {
	var listVars = window.location.search.substring(1).split("&");
	var arVars = new Array();
	for (var i=0; i<listVars.length; i++) {
	    var pair = listVars[i].split("=");
		if (pair[0].toLowerCase() == variable.toLowerCase()) return pair[1];
	}
}

var affID = getVar("affID");
var crID = getVar("crID");
var refPage = escape(window.document.referrer);

if(affID != '' && affID != undefined){
	strQs = 'affid=' + affID;
	if (crID != '') strQs += '&crid=' + crID;
	if (refPage != '') strQs += '&ref=' + refPage;
	document.write('<img src="http://www.eurocamp.co.uk/afftrack/?' + strQs + '" />');
}