function menu_initialise() {
	var aLI = YAHOO.util.Dom.getElementsByClassName('niveau2', 'LI');
	for (var i = 0; i < aLI.length; i++) {
		var aA = aLI[i].getElementsByTagName('A');
		aA[0].onclick = menu_affichage;
	}	
}
function menu_affichage() {
	try {
		var li = document.getElementById('LI_'+this.id);
		if (ol = li.getElementsByTagName('OL')[0]) {
			if (YAHOO.util.Dom.getStyle(ol, 'display') == 'block') {
				YAHOO.util.Dom.setStyle(ol, 'display', 'none');
			}
			else {
				var tab = YAHOO.util.Dom.getElementsByClassName('niveau2', 'LI');
				for (var i = 0; i < tab.length; i++) {
					olN2 = tab[i].getElementsByTagName('OL')[0];
					YAHOO.util.Dom.setStyle(olN2, 'display', 'none');
				}
				YAHOO.util.Dom.setStyle(ol, 'display', 'block');
			}
		}
	}
	catch (e) {
		alert("Erreur menu_montre\n" + e.message);
	}
}
addEventLst(window, 'load', menu_initialise);