function Menu(){
	
	this.menuDepart = 0;
	this.menuActuel = "";
	this.menus = ["", "actualites", "informations", "services", "bottin"];
	
	this.init = function(depart){
		this.menuDepart = depart;
		this.afficherSousMenu(depart);
	}
	
	this.rollover = function(menu){
		this.menuActuel = menu;
		this.afficherSousMenu(menu);
	}
	
	this.rollout = function(){
		this.menuActuel = "";
		this.afficherSousMenu(this.menuDepart);
	}
	
	this.afficherSousMenu = function(menu){
		for (var i = 1; i < this.menus.length; i++){
			if (i == menu){
				document.getElementById("btn-" + this.menus[i]).className = "over";
				document.getElementById("sous-menu-" + this.menus[i]).style.display = "block";
			} else {
				document.getElementById("btn-" + this.menus[i]).className = "";
				document.getElementById("sous-menu-" + this.menus[i]).style.display = "none";
			}
		}
	}

}