private void tb_syain_cd_DoubleClick(object sender, EventArgs e)
        {
            //選択画面へ
            string w_cd;

            w_cd = tss.search_syain("2", tb_syain_cd.Text);
            if (w_cd != "")
            {
                tb_syain_cd.Text = w_cd;
                if (chk_syain_cd() != true)
                {
                    MessageBox.Show("社員コードに異常があります。");
                    tb_syain_cd.Focus();
                }
            }
        }