//Author: Edward Raddar
//Date: 10/06/08
//Purpose: To drop down menus on click or on mouse over

//Note: A maximum of six menu buttons are allowed background effect to work well.
//To add more menus, go to function changeMenuBG() and add the new menu IDs

var outBG = 'url(\'/images/bgs/mbg_y1.png\') 0% 1%'; //onMouseOut background
var overBG = 'url(\'/images/bgs/mbg_y1.png\') 0% 50%'; //onMouseOver background
var clearBG = 'none'; //onMouseOut clear menu button
var hrule1 = '<img src="images/bgs/dropMenuHR.bmp" class="dropMenuHR" />'; //dropMenu horizontal rule 1
var hrule2 = '<img src="images/bgs/dropMenuHR2.bmp" class="dropMenuHR" />'; //dropMenu horizontal rule 2

var menuwidth='150px' //default menu width
var menubgcolor=''  //default menu bgcolor
var disappeardelay=1000  //default menu disappear speed onMouseout (in miliseconds)
var hidemenu_onclick='no' //hide menu when user clicks within menu? yes or no

/////No further editing needed below this line/////////////////////////////////////////////////////////

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

function clearMenuBG() {
		menu1.style.background = clearBG
		menu2.style.background = clearBG
		menu3.style.background = clearBG
		menu4.style.background = clearBG
		menu5.style.background = clearBG
		menu6.style.background = clearBG
}

function resetMargins() {
document.all.dropmenudiv.style.margin = '0px 0px 0px -1px'
}

if (ie4||ns6)
	document.write('<div id="dropmenudiv" style=" 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="-10px"
	if (menuwidth!=""){
	dropmenuobj.widthobj=dropmenuobj.style
	dropmenuobj.widthobj.width=menuwidth
	}
	if (e.type == "click" && obj.visibility == visible)
	obj.visibility = hidden
	else if (e.type == "click" || "mouseover" && obj.visibility == hidden || e.type == "mouseover")
	obj.visibility = visible
}

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 -200 : 	window.pageXOffset+window.innerWidth -200
		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-200 : 	window.pageYOffset+window.innerHeight-200
		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 popmenudiv(obj, e, menucontents, menuwidth){
	if (window.event) event.cancelBubble=false
	else if (e.stopPropagation) e.stopPropagation()
	clearhidemenu()
	dropmenuobj=document.getElementById? document.getElementById("popmenudiv") : popmenudiv
	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"
		clearMenuBG()
	}
	resetMargins()
}

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

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

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