function getParam(key) {
	if (document.location.toString().split('?').length == 1)
		return null;

	var getQuery = document.location.toString().split('?')[1];
	var arrKeyValue = getQuery.split('&');

	for (var i in arrKeyValue) {
		if (key == arrKeyValue[i].split('=')[0]) {
			return arrKeyValue[i].split('=')[1];
		}
	}

	return null;
}