.retour {
background-image: url('boutons/bt_retour_1.jpg');
display: block;
 }
.retour:hover {
background-image: url('boutons/bt_retour_2.jpg') }




.bio {
background-image: url('boutons/bt_biographie_1.jpg');
display: block;
 }
.bio:hover {
background-image: url('boutons/bt_biographie_2.jpg') }




.tv {
background-image: url('boutons/bt_series_tv_1.jpg');
display: block;
}

.tv:hover {
background-image: url('boutons/bt_series_tv_2.jpg') }





.ls {
background-image: url('boutons/bt_projet_l&s_1.jpg');
display: block;
}

.ls:hover {
background-image: url('boutons/bt_projet_l&s_2.jpg') }





.a7 {
background-image: url('boutons/bt_anneau_7_1.jpg');
display: block;
}

.a7:hover {
background-image: url('boutons/bt_anneau_7_2.jpg') }




.gal {
background-image: url('boutons/bt_galeries_perso_1.jpg');
display: block;
}

.gal:hover {
background-image: url('boutons/bt_galeries_perso_2.jpg') }





.or {
background-image: url('boutons/bt_livre_dor_1.jpg');
display: block;
}

.or:hover {
background-image: url('boutons/bt_livre_dor_2.jpg') }




.faq {
background-image: url('boutons/bt_faq_1.jpg');
display: block;
}

.faq:hover {
background-image: url('boutons/bt_faq_2.jpg') }



.contact {
background-image: url('boutons/bt_contact_1.jpg');
display: block;
}

.contact:hover {
background-image: url('boutons/bt_contact_2.jpg') }



.mail {
background-image: url('boutons/bt_mailing_1.jpg');
display: block;
}

.mail:hover {
background-image: url('boutons/bt_mailing_2.jpg') }



.liens {
background-image: url('boutons/bt_liens_1.jpg');
display: block;
}

.liens:hover {
background-image: url('boutons/bt_liens_2.jpg') }

.retour_a7 {
background-image: url('boutons/bt_retour_a7_1.png');
display: block;
}

.retour_a7:hover {
background-image: url('boutons/bt_retour_a7_2.png') }