function QueryString(key) {
		var value = null;
		for (var i=0;i<QueryString.keys.length;i++)
		{
			if (QueryString.keys[i]==key)
			{
				value = QueryString.values[i];
				break;
			}
		}
		return value;
	}

	QueryString.keys = new Array();
	QueryString.values = new Array();