                  <form action="" name="formTipoabo" autocomplete="off" enctype="multipart/form-data">
                    <div class="form-group form-row">
                      <div class="col-md-6">
                        <label for="txtNom">Nombre</label>
                        <input type="text" class="form-control form-control-sm form-control-as" id="txtNom" placeholder="">
                      </div>
                    </div>

                    <div class="form-group form-row">
                      <div class="col">
                        <button class="btn btn-success btn-block" type="button" onclick='buscarTipoabo(<?php echo '"'.$b.'"' ?>, <?php echo '"'.$a.'"' ?>); return false;'>Buscar</button>
                      </div>
                    </div>

                    <div class="form-group form-row">
                      <div class="col-md-12">
                        <div class="table-responsive">
                          <table class="table table-hover table-borderless table-dark table-sm" id="tblTipoabo">
                            <thead>
                              <tr>
                                <th scope="col">CODIGO</th>
                                <th scope="col">NOMBRE</th>
                                <th scope="col"></th>
                              </tr>
                            </thead>
                            <tbody>
                            </tbody>
                          </table>
                        </div>
                      </div>
                    </div>
                    <script type="text/javascript" src="busTipoabo/scripts.js?v=1.3"></script>
                  </form>