// Global Variables
var nwd_scheme = "http:";
var nwd_host = "counter.surfcounters.com";
var nwd_page = "NetworkGUID.aspx";
var nwd_src = "";
var timeDelay = 80;
var nwd_sessionid = (typeof nwd_sesid != "undefined" && nwd_sesid ? nwd_sesid: "x");


// Ping surfcounters and generate a 3rd party cookie
function GenerateNWGUID() {
	var pixel = new Image();
	pixel.src = "http://counter.surfcounters.com/counter.aspx?javascript=yes&sessionid="+nwd_sessionid;
	setTimeout("makeNWD()", timeDelay);
}

function checkNWD() {
	// Construct the url to the surfcounters page (if we're in a secure zone (https), the call to
	// surfcounters should be secured as well.
	var cookie = getCookie('NWD');
    var ret = false;
    if(cookie != '' && cookie != null) {
		ret = true;
    }
	return ret;
}

function makeNWD() {
	try {
	    ret = true;
		var cur_scheme = document.location.protocol;
		if (cur_scheme == 'https:')
			nwd_sceme = cur_scheme;
		nwd_src = nwd_scheme + '//';
		nwd_src += nwd_host + '/';
		nwd_src += nwd_page;
	} catch (e) { }
	
	var headID = document.getElementsByTagName("head")[0];
	var newScript = document.createElement('script');
	newScript.type = 'text/javascript';
	newScript.src = nwd_src;
	headID.appendChild(newScript);
	return false;
}

function NWD(feed) {
	nwdval = '';
	if (feed.NWGUID != '') {
		nwdval = feed.NWGUID;
		setCookie('NWD', nwdval, 365, '/', '', '');
	}
}


// Cookie libs
function getCookie(name) {
	var start = document.cookie.indexOf(name + "=");
	var len = start + name.length + 1;
	if ((!start) && (name != document.cookie.substring(0, name.length))) {
		return null;
	}
	if (start == -1) return null;
	var end = document.cookie.indexOf(";", len);
	if (end == -1) end = document.cookie.length;
	return unescape(document.cookie.substring(len, end));
}

function setCookie(name, value, expires, path, domain, secure) {
	var today = new Date();
	today.setTime(today.getTime());
	if (expires) {
		expires = expires * 1000 * 60 * 60 * 24;
	}
	var expires_date = new Date(today.getTime() + (expires));
	document.cookie = name + "=" + escape(value) +
    ((expires) ? ";expires=" + expires_date.toGMTString() : "") + //expires.toGMTString()
    ((path) ? ";path=" + path : "") +
    ((domain) ? ";domain=" + domain : "") +
    ((secure) ? ";secure" : "");
}

function deleteCookie(name, path, domain) {
	if (getCookie(name)) document.cookie = name + "=" +
    ((path) ? ";path=" + path : "") +
    ((domain) ? ";domain=" + domain : "") +
    ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
}



if (!checkNWD()) GenerateNWGUID();