var arrzvars = new Array("zmam", "zmas","zmac",	"zmap");
var arrzvals = new Array("0", "0", "0", "");
var url = document.URL.toLowerCase();
//alert(document.cookie);
for(var i=0; i<arrzvars.length; i++) {
	var vName = arrzvars[i];
	begin  = url.indexOf(vName+'=');
	if(begin >= 0) {
		arrzvals[i] = suckValue(url, begin, vName);
	}
}
var zmam = arrzvals[0];
var zmas = arrzvals[1];
var zmac = arrzvals[2];
var zmap = arrzvals[3];
var zmar = "";
zmaq = 'NA';

if(zmap.indexOf("?") > 0) {
	var arrzmap = zmap.split('?');
	zmap = arrzmap[0];
}
//var images = document.images;
//for(var i=0; i<images.length; i++){
//if(images[i].src.indexOf("zmaq=") > 0) {
//		var arrImgSrc = images[i].src.split('&');
//
//		var zmaq = arrImgSrc[1].substring(arrImgSrc[1].indexOf('=')+1);
//	}
//}

// if none of our url variables is found then do nothing.
if(zmam == "0") {
	// do nothing
} else {
	// burn cookie variables
	document.cookie = "zmam=" + zmam;
	document.cookie = "zmas=" + zmas;
	document.cookie = "zmac=" + zmac;
	document.cookie = "zmap=" + zmap;
		
	
	//write <img..> tag in the document
	var str = 	"<img src=\"http://chanalytics.merchantadvantage.com/inChannel/capq.asp?zmam=" + zmam +
				"&zmas=" + zmas + "&zmac=" + zmac + "&zmap=" + zmap + "&zmaq=" + zmaq + "&zmar=" +  document.referrer +   "\" width=0 height=0>";
	document.write(str);
	//alert(str);
}



function suckValue(url, begin, name) {
	begin = begin + name.length + 1;
	var value = "";
	for(var i=begin; i<url.length; i++) {
		var digit = url.charAt(i);
		if(isNaN(digit)) {
			if(name == "zmap") {
				value = value + digit;
			} else {
				break;
			}
		} else {
			value = value + digit;
		}
	}
	return value;
}