void m_cmd_len_luong_cho_nv_ItemClick(object sender, ItemClickEventArgs e)
        {
            try
            {
                f300_chinh_lns_nhan_vien v_frm = new f300_chinh_lns_nhan_vien();
                if(IsExistFormName(v_frm)) return;

                v_frm.MdiParent = this;
                v_frm.Show();
            }
            catch(Exception v_e)
            {
                CSystemLog_301.ExceptionHandle(v_e);
            }
        }