var Msticky;
var MstickyChild;

function getSticky() {
	var topLevel = document.getElementById("nav").getElementsByTagName("LI");
	var sticky;
	for (var e = 0; e < topLevel.length; e++) {
		var thisClass = topLevel[e].className;
		var thisId = topLevel[e].id;
		if (thisClass.search("selected") != -1) {
			Msticky = thisId;
			MstickyChild = thisId.replace('main','sub');
		}
	}
	MstickyOB = document.getElementById(Msticky);
	MstickyChildOB = document.getElementById(MstickyChild);
}

function show_menu (objectId) {
	var parentId;
	parentId = objectId.replace('sub','main');

	var show = document.getElementById(objectId);

	// close ALL menus
	var closeList = document.getElementById("nav").getElementsByTagName("LI");
	for (var e = 0; e < closeList.length-1; e++) {
		var closeParent = closeList[e].id;
		var closeChild;
		document.getElementById(closeParent).className="off";
		closeChild = closeParent.replace('main','sub');
		document.getElementById(closeChild).className="nav_sub_off";
	}
	// open the new menu
	show.className="nav_sub_on";
	document.getElementById(parentId).className="selected";

	// retain it
	show.onmouseover=function() {
		show.className="nav_sub_on";
		document.getElementById(parentId).className="selected";
		if (objectId != MstickyChild) {
			MstickyChildOB.className="nav_sub_off";
			MstickyOB.className="off";
		}
	}
	show.onmouseout=function() {
		show.className="nav_sub_off";
		document.getElementById(parentId).className="off";
		MstickyChildOB.className="nav_sub_sticky";
		MstickyOB.className="selected";
	}
	document.getElementById(parentId).onmouseout=function() {
		show.className="nav_sub_off";
		document.getElementById(parentId).className="off";
		MstickyChildOB.className="nav_sub_sticky";
		MstickyOB.className="selected";
	}
}