protected void Page_Load(object sender, EventArgs e)
        {
            int id = Convert.ToInt16(Request.QueryString["Id"]);

            DAO.Center aCenter = aCenterManager.DisplayNewCenter(id);
            nameLabel.InnerText     = aCenter.Name;
            codeLabel.InnerText     = aCenter.Code;
            passwordLabel.InnerText = aCenter.Password;
        }