function getCookieData(labelName) {
	var labelLen = labelName.length;
	// read cookie property only once for speed
	var cookieData = document.cookie;
	var cLen = cookieData.length;
	var i = 0;
	var cEnd;
	while (i < cLen) {
		var j = i + labelLen;
		if (cookieData.substring(i,j) == labelName) {
			cEnd = cookieData.indexOf(";",j);
			if (cEnd == -1) {
				cEnd = cookieData.length;
			}
			return unescape(cookieData.substring(j+1, cEnd));
		}
		i++
	}
	return "";
}