var menu = new Array;
menu[1] = "menu1";
menu[2] = "menu2";
menu[3] = "menu3";
menu[4] = "menu4";
menu[5] = "menu5";
menu[6] = "menu6";
menu[7] = "menu7";
menu[8] = "menu8";
menu[9] = "menu9";

function showMenu(n){
	var obj = eval(menu[n]);
		
	if(obj.style.visibility=="visible") return;

	obj.style.visibility="visible";
}

function hideMenu(n) {
	var obj = eval(menu[n]);
	obj.style.visibility="hidden";

}