function maj_fond_onglets(btn_name){
	if (btn_name == 'bt_selection'){
		document.getElementById('bt_selection').src='templates/mon-herboristerie/images/onglet_selection_on.jpg';
		document.getElementById('bt_promos').src='templates/mon-herboristerie/images/onglet_promotions_off.jpg';
		document.getElementById('bt_nouveautes').src='templates/mon-herboristerie/images/onglet_nouveautes_off.jpg';
	}
	if (btn_name == 'bt_promos'){
		document.getElementById('bt_selection').src='templates/mon-herboristerie/images/onglet_selection_off.jpg';
		document.getElementById('bt_promos').src='templates/mon-herboristerie/images/onglet_promotions_on.jpg';
		document.getElementById('bt_nouveautes').src='templates/mon-herboristerie/images/onglet_nouveautes_off.jpg';
	}
	if (btn_name == 'bt_nouveautes'){
		document.getElementById('bt_selection').src='templates/mon-herboristerie/images/onglet_selection_off.jpg';
		document.getElementById('bt_promos').src='templates/mon-herboristerie/images/onglet_promotions_off.jpg';
		document.getElementById('bt_nouveautes').src='templates/mon-herboristerie/images/onglet_nouveautes_on.jpg';
	}
}