public void CST_NO_onblur(
      DataDom dataDom, SessionInfo sessionInfo, ServiceRequest serviceRequest) {
    Database db = null;
    Rowset rs = null;
    String sql = "";
    String cstNo = "";
    String cstId = "";
    String cstNam = "";

    try {
      db = Tools.getDatabase(true);
      cstId = Charset.nullToEmpty(serviceRequest.getParameter("value"));
      if (!cstId.equals("")) {
        sql = "select cst_no,cst_nam from ogcstmst where cst_id='" + cstId + "'";
        rs = db.getRS(sql);
        if (rs.getRowCount() <= 0) {
          serviceRequest.addServiceReturnParameter("CSTFLG", "FALSE");
          return;
        } else {
          if (rs.next()) {
            cstNo = Charset.nullToEmpty(rs.getString("cst_no"));
            cstNam = Charset.nullToEmpty(rs.getString("cst_nam"));
          }
        }
      }
      serviceRequest.addServiceReturnParameter("CSTFLG", "TRUE");
      serviceRequest.addServiceReturnParameter("CST_NO", cstNo);
      serviceRequest.addServiceReturnParameter("CST_NAM", cstNam);

    } catch (Exception e) {
      Log.error(e);
    } finally {
      if (db != null) db.cleanup();
    }
  }