function test(id) {

	document.getElementById("menu1").style.visibility = "hidden";
	document.getElementById("menu2").style.visibility = "hidden";
	document.getElementById("menu3").style.visibility = "hidden";	
	document.getElementById("menu5").style.visibility = "hidden";


	menu = document.getElementById("menu" + id);
	menu.style.visibility = "visible";

	
}