.rn_social {
	position: relative !important;
	height: 30px !important;
	border: none !important;
	margin-left: 520px !important;
}
a.enlazar_facebook:hover {
	background-image: url(http://www.cervantes.es/imagenes/image/comunes/iconos/social_facebook_on.gif) !important;	
}
a.enlazar_twitter:hover {
	background-image: url(http://www.cervantes.es/imagenes/image/comunes/iconos/social_twitter_on.gif) !important;	
}