// The mighty dollar function
function $() {
	var elements = new Array();
	var isMoz = false;
	var isIE = false;
	if(document.getElementById) isMoz = true; //e=document.getElementById(e);
	else if(document.all) isIE = true; // e=document.all[e]; 

	for (var i = 0; i < arguments.length; i++) {
		var element = arguments[i];
		if (typeof element == 'string') {
			if (isMoz) element = document.getElementById(element);
			else if (isIE) element = document.all[element];
			else return "";
		}
		if (arguments.length == 1)
			return element;
		elements.push(element);
	}
	return elements;
}

var submenus = new Object();
var lastMid = null;
function initMenu() {
	var divs = document.getElementsByTagName("div");
	var count = 0;
	for (i=0; i<divs.length; i++){
		if (divs[i].className == 'submenu') {
			submenus[divs[i].id] = divs[i].style.visibility;
			if (divs[i].style.visibility == "visible") lastMid = divs[i].id;
		}
	}
}

function showMenu(mid) {
	if (mid == lastMid) return;
	//if (!$(mid)) return;
	if (lastMid != null && $(lastMid))
		$(lastMid).style.visibility = "hidden";
	if ($(mid))
		$(mid).style.visibility = "visible";
	lastMid = mid;
}