var submenus = new Array();

var active_submenu = null;
var defaultmenu = null;

function toggle(obj) {
	var el = document.getElementById(obj);
	el.style.visibility = (el.style.visibility != 'hidden' ? 'hidden' : 'visible' );
}

function closeall() {
	for ( var i=0; i < submenus.length; i++ ) {
		var el = document.getElementById(submenus[i]);
		el.style.visibility = 'hidden';
	}
}

function controlsubmenu(obj) {
	closeall();
	toggle(obj);
}

function initialize() {
	closeall();
	toggle(active_submenu);
}