html, body {
  background: 0;
}

#header, #nav, #columder, #crumbs, #footer, #ofertas_empleo, #botones {
  display: none;
}

#fondo_semi {
  background: 0;
}

#oferta_empleo {
  display: block;
  position: relative;
  top: 0;
  left: 0;
  margin: 0;
}