protected void Btn_add_Click(object sender, EventArgs e)
        {
            string suppcode     = TB_suppCode.Text;
            string suppname     = TB_suppName.Text;
            string contacttitle = TB_contactTitle.Text;
            string contactname  = TB_contactName.Text;
            string phone        = TB_phone.Text;
            string fax          = TB_fax.Text;
            string address      = TB_address.Text;
            string postcode     = TB_postalCode.Text;
            string gst          = TB_gst.Text;

            StoreBusinessLogic.AddNewSupplier(suppcode, suppname, contacttitle,
                                              contactname, phone, fax, address, postcode, gst);
        }