// Set of functions to operate cookies and check URL vars against string
function writeCookie(name, value, hours) {
	var expire = "";
	
	if (hours != null) {
		expire = new Date((new Date()).getTime() + hours * 3600000);
		expire = "; expires=" + expire.toGMTString();
	}
	document.cookie = name + "=" + escape(value) + expire;
}

function readCookie(name) {
	var cookieValue = "";
	var search = name + "=";
	
	if(document.cookie.length > 0) { 
		offset = document.cookie.indexOf(search);
		if (offset != -1) { 
			offset += search.length;
			end = document.cookie.indexOf(";", offset);
			if (end == -1) {end = document.cookie.length;}
			cookieValue = unescape(document.cookie.substring(offset, end))
		}
	}
	return cookieValue;
}

function checkURL(adRef) {
	if (location.search != "") {
		var URLQuery = location.search.substr(1).split("&")
		var queryContent = URLQuery[0].split("=")
		
		if ( queryContent.length > 1) {
			if ( (queryContent[0].toLowerCase() == adRef.toLowerCase()) && (queryContent[1].length > 0) ) {
				writeCookie(adRef, queryContent[1], 720);
			}
		}
	}
}