.fondo_inicio {
	background-attachment: fixed;
	background-image: url(imagenes/inicio.gif);
	background-repeat: no-repeat;
	background-position: right bottom;
	}
.fondo_m_teorico {
	background-attachment: fixed;
	background-image: url(imagenes/marco_teorico.gif);
	background-repeat: no-repeat;
	background-position: right bottom;
	}

.fondo_nosostros {
	background-attachment: fixed;
	background-image: url(imagenes/nosotros.gif);
	background-repeat: no-repeat;
	background-position: right bottom;
	}

.fondo_a_investigacion {
	background-attachment: fixed;
	background-image: url(imagenes/actividades_investigacion.gif);
	background-repeat: no-repeat;
	background-position: right bottom;
	}

.fondo_l_investigacion {
	background-attachment: fixed;
	background-image: url(imagenes/lineas_investigacion.gif);
	background-repeat: no-repeat;
	background-position: right bottom;
	}

.fondo_contactenos {
	background-attachment: fixed;
	background-image: url(imagenes/contactenos.gif);
	background-repeat: no-repeat;
	background-position: right bottom;
	}

.fondo_publicaciones {
	background-attachment: fixed;
	background-image: url(imagenes/publicaciones.gif);
	background-repeat: no-repeat;
	background-position: right bottom;
	}