var menuwidth = '150px'; // Default menu width
var disappeardelay = 250;  // Menu disappear speed onMouseout (in miliseconds)
var hidemenu_onclick = "yes"; // Hide menu when user clicks within menu?

/////No further editting needed

var ie4 = document.all;
var ns6 = document.getElementById && !document.all;

if (ie4 || ns6)
	document.write('<div id="dropmenudiv" class="navlink" style="visibility:hidden;width:' + 
		menuwidth + '" onMouseover="clearhidemenu()" onMouseout="dynamichide(event)"></div>');

function getposOffset(what, offsettype) {
	var totaloffset = (offsettype == "left") ? what.offsetLeft : what.offsetTop;
	var parentEl = what.offsetParent;
	while (parentEl != null) {
		totaloffset = (offsettype == "left") ? totaloffset+parentEl.offsetLeft : totaloffset + parentEl.offsetTop;
		parentEl = parentEl.offsetParent;
	}
	return totaloffset;
}

function showhide(obj, e, visible, hidden, menuwidth) {
	if (ie4 || ns6)
		dropmenuobj.style.left = dropmenuobj.style.top = "-500px";
	if (menuwidth!="") {
		dropmenuobj.widthobj = dropmenuobj.style;
		dropmenuobj.widthobj.width = menuwidth;
	}
	if (e.type == "click" && obj.visibility == hidden || e.type == "mouseover")
		obj.visibility = visible;
	else if (e.type == "click")
		obj.visibility = hidden;
}

function iecompattest() {
	return (document.compatMode && document.compatMode != "BackCompat") ? document.documentElement : document.body;
}

function clearbrowseredge(obj, whichedge) {
	var edgeoffset = 0;
	if (whichedge == "rightedge") {
		var windowedge = ie4 && !window.opera ? iecompattest().scrollLeft + iecompattest().clientWidth - 15 : window.pageXOffset + window.innerWidth - 15;
		dropmenuobj.contentmeasure = dropmenuobj.offsetWidth;
		if (windowedge - dropmenuobj.x < dropmenuobj.contentmeasure)
			edgeoffset = dropmenuobj.contentmeasure - obj.offsetWidth;
	} else {
		var topedge = ie4 && !window.opera ? iecompattest().scrollTop : window.pageYOffset;
		var windowedge = ie4 && !window.opera ? iecompattest().scrollTop + iecompattest().clientHeight - 15 : window.pageYOffset + window.innerHeight - 18;
		dropmenuobj.contentmeasure = dropmenuobj.offsetHeight;
		if (windowedge-dropmenuobj.y < dropmenuobj.contentmeasure) { //move up?
			edgeoffset = dropmenuobj.contentmeasure + obj.offsetHeight;
			if ((dropmenuobj.y-topedge) < dropmenuobj.contentmeasure) //up no good either?
				edgeoffset=dropmenuobj.y + obj.offsetHeight - topedge;
		}
	}
	return edgeoffset;
}

function populatemenu(what) {
	if (ie4 || ns6)
		dropmenuobj.innerHTML = what.join("");
}

function dropdownmenu(obj, e, menucontents, menuwidth) {
	if (window.event)
		event.cancelBubble = true;
	else if (e.stopPropagation)
		e.stopPropagation();
	clearhidemenu();
	dropmenuobj = document.getElementById ? document.getElementById("dropmenudiv") : dropmenudiv;
	populatemenu(menucontents);
	
	if (ie4 || ns6) {
		showhide(dropmenuobj.style, e, "visible", "hidden", menuwidth);
		dropmenuobj.x = getposOffset(obj, "left");
		dropmenuobj.y = getposOffset(obj, "top");
		dropmenuobj.style.left = dropmenuobj.x - clearbrowseredge(obj, "rightedge") + "px";
		dropmenuobj.style.top = dropmenuobj.y - clearbrowseredge(obj, "bottomedge") + obj.offsetHeight + "px";
	}
	return clickreturnvalue();
}

function clickreturnvalue() {
	if (ie4||ns6)
		return false;
	else
		return true;
}

function contains_ns6(a, b) {
	while (b.parentNode)
		if ((b = b.parentNode) == a)
			return true;
	return false;
}

function dynamichide(e){
	if (ie4 && !dropmenuobj.contains(e.toElement))
		delayhidemenu();
	else if (ns6 && e.currentTarget != e.relatedTarget && !contains_ns6(e.currentTarget, e.relatedTarget))
		delayhidemenu();
}

function hidemenu(e){
	if (typeof dropmenuobj != "undefined") {
		if (ie4 || ns6)
			dropmenuobj.style.visibility = "hidden";
	}
}

function delayhidemenu(){
	if (ie4 || ns6)
		delayhide = setTimeout("hidemenu()", disappeardelay);
}

function clearhidemenu() {
	if (typeof delayhide != "undefined")
		clearTimeout(delayhide);
}

if (hidemenu_onclick == "yes")
	document.onclick = hidemenu;