#annonce a {
	position: absolute;
	display: block;
	background-color: none;
	background-image: none;
}	
#annonce a:hover {
	background-color: black;
	-moz-opacity: 0.3;
	-khtml-opacity: 0.3;
	opacity: 0.3;
	filter : alpha(opacity=30);
}
#annonce a.boutonPodcast:hover {
	background-color: transparent;
	background-image: url(http://www.nedra.fr/site/acceuil/animations/online-stores/bouton-ecouter-on.png);
}
#annonce a.boutonBoutique:hover {
	background-color: transparent;
	background-image: url(http://www.nedra.fr/site/acceuil/animations/online-stores/bouton-acheter-on.png);
}