var _BASENET_REFERER_COOKIE = "basenet-referer";

function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function getJSReferrer(){
	var referrer = readCookie(_BASENET_REFERER_COOKIE);
	if (referrer == null){
		return "";
	}
	return referrer;
}

function getArg(arg){
	var aResult = [];
	var aHref = window.location.href.split("?");
	if (aHref.length == 2) {
		var aKeyValues = aHref[1].split("&");
		for (var i = 0 ; i < aKeyValues.length ; i++) {
			var aKV = aKeyValues[i].split("=");
			if (aKV.length == 2) {
				if (aKV[0] == arg ){
					return aKV[1];
				}
			}
		}
	}
	return null;
}

function setJSReferrer() {
	if (readCookie(_BASENET_REFERER_COOKIE) != null) {
		// is al gezet.
		return;
	}
	
	var referrer = document.referrer;
	if (referrer == null) {
		createCookie("referrer","Internet direct",1);
		return;
	}
	
	var sReferDomain;
	if (getArg("referrer") != null) {
		// zelf ingestelde naam uit adwords
		sReferDomain = getArg("referrer");
	} else {
		// alleen domeinnaam.
		if (referrer==""){
			sReferDomain = "Internet direct";
		} else {
			sReferDomain = referrer.split("/")[2]; // http://www.google.com/
		}
	}
	createCookie(_BASENET_REFERER_COOKIE, sReferDomain, 1);
	
}
// Zet JS referrer
setJSReferrer();