var imgFavOn = 'images/btn_favoris_on.png';
var imgFavOff = 'images/btn_favoris_off.png';

updateFavori = function (id) {
	$$('.favori').each ( function (el) {
		el.src = imgFavOff;
	});
	$(id).src = imgFavOn;
}

initFavori = function () {
	$$('.favori').each ( function (el) {
		el.style.cursor = 'pointer';
		el.addEvent('click', function (e) {
			var id = this.id;
			var req = new Request({
				method: 'get',
				url : 'ajax/ajax_favori.php',
				onComplete : function (reponse) { 
					if (reponse != -1)
					updateFavori(id);
				}
			}).send('id=' + this.id);
		});
	});
}

aFunctions.push(initFavori);