<div class="container" id="cuerpo">
        <div class="card card-outline-secondary">
                <div class="card-header">
                    <h3 class="mb-0">Punto de Acceso</h3>
                </div>
                <div class="card-body">
                    <form class="form" role="form" autocomplete="off" id="loginForm" novalidate="" action="#" method="post" onsubmit="return validar(this);">
                        <div class="form-group">
                            <label for="uname1">Usuario</label>
                            <input type="text" class="form-control" name="usuario" id="uname1" required="">

                        </div>
                        <div class="form-group">
                            <label>Contraseña</label>
                            <input type="password" class="form-control" id="password" required="" autocomplete="new-password">

                        </div>
                        <div class="form-check small">
                            <label class="form-check-label">
                                <input type="checkbox" class="form-check-input"> <span>Recordar en este equipo</span>
                            </label>
                        </div>
                        <button type="submit" class="btn btn-primary btn-lg float-right" data-toggle="modal" data-target="#myModal" id="btnLogin">Entrar</button>
                    </form>
                </div>
                <!--/card-body-->
            </div>

            <div id="myModal" class="modal fade" role="dialog">
                    <div class="modal-dialog">

                      <!-- Modal content-->
                      <div class="modal-content">
                        <div class="modal-header" id="modal-header">
                          <button type="button" class="close" data-dismiss="modal">&times;</button>

                        </div>
                        <div class="modal-body">
                          <p>Usuario o contraseña Incorrecta.
                             </p>
                        </div>
                        <div class="modal-footer">
                          <button type="button" class="btn btn-primary" data-dismiss="modal">Close</button>
                        </div>
                      </div>

                    </div>
                  </div>
      </div>