window.addEvent('domready', function() {
	var ulNiveau1 = $('menu').getElementsByTagName('ul')[0];
	
	// On parcourt les niveaux 1	
	for(i=0; i<ulNiveau1.getElementsByTagName('li').length; i++) {
		var liElt = ulNiveau1.getElementsByTagName('li')[i];
		if (liElt.parentNode.className == 'level_1') { // LI de niveau 1
			if(liElt.getElementsByTagName('ul').length > 0) { // Avec sous menu
				liElt.getElementsByTagName('ul')[0].style.display = "none";
				liElt.id = "menuN1_" + i;
				$(liElt.id).addEvent('mouseenter', function(){
					if (this.className.indexOf('active') < 0 && this.className.indexOf('trail') < 0); {
						this.getElementsByTagName('a')[0].style.backgroundPosition = "0 0";
					}
					this.getElementsByTagName('ul')[0].style.display = "block";
				});
				$(liElt.id).addEvent('mouseleave', function(){
					if (this.className.indexOf('active') < 0 && this.className.indexOf('trail') < 0) {
						this.getElementsByTagName('a')[0].style.backgroundPosition = "0 -500px";
					}
					this.getElementsByTagName('ul')[0].style.display = "none";
				});
			}
		}
	}
});