private method: convert query string to key-value object
function(string) {
		var obj = {};
		if (typeof string == "string") {
			string.split("&").forEach(function(part) {
				var arrPart = part.split("=");
				if (arrPart.length > 1) {
					obj[arrPart[0]] = part.replace(arrPart[0] + "=", "");
				}
			});
		}
		return obj;
	}