var menuwidth = '165px'; 		//default menu width
var disappeardelay = 50;  		//menu disappear speed onMouseout (in miliseconds)
var hidemenu_onclick="yes"; 	//hide menu when user clicks within menu?

var normal_menu_backcolor = '#ffffff';
var normal_menu_border = '#ffffff';
var normal_menu_image = 'url(images/arrownormal.gif)';
var active_menu_backcolor = '#e3ebf2';
var active_menu_border = '#a1c6eb';
var active_menu_image = 'url(images/arrowhover.gif)';

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

if (ie4 || ns6)
	document.write('<div id="dropmenudiv" 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();

	resetmenu();
	//obj.style.bordercolor= 'yellow';
	obj.style.backgroundColor = active_menu_backcolor;
	obj.style.backgroundImage = active_menu_image;
	obj.style.borderColor = active_menu_border;
	menuobj = obj;
	
	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 resetmenu()
{
	if (typeof menuobj != "undefined")
	{
		menuobj.style.backgroundColor = normal_menu_backcolor;
		menuobj.style.backgroundImage = normal_menu_image;
		menuobj.style.borderColor = normal_menu_border;
	}
}

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

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

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

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