function changeMenu(nb,nbmenu) {
	//var menu = document.getElementById('menu');
	var ssmenu = document.getElementById('ssmenu'+nb);
	
	for (var i=1;i<=nbmenu;i++) {
		if (i != nb) document.getElementById("ssmenu" + i).className = "cache";
	}
		
	if (ssmenu.className == "cache") {
		//menu.className   = "menu_ouvert";
		ssmenu.className = "visible";
	} else {
		//menu.className   = "menu_ferme";
		ssmenu.className = "cache";
	}
	
}