private Object validar;
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

m.setCorreo(correo);
  m.setContrasena(contrasena);
  m.setNombre(nombre);

}//if
   else
       validar="REGISTRO NO ENCONTRADO";

if(g.modificarMensaje(m))
      validar = "REGISTRO MODIFICADO";
   else
       validar="ERROR AL MODIFICAR EL REGISTRO";

}//post


protected void doget(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {