/**********************************************************************************   
FoldoutMenu 
*   Copyright (C) 2001 <a href="/dhtmlcentral/thomas_brattli.asp">Thomas Brattli</a>
*   This script was released at DHTMLCentral.com
*   Visit for more great scripts!
*   This may be used and changed freely as long as this msg is intact!
*   We will also appreciate any links you could give us.
*
*   Made by <a href="/dhtmlcentral/thomas_brattli.asp">Thomas Brattli</a> 
*********************************************************************************/

function lib_bwcheck()
{
	this.ver = navigator.appVersion;
	this.agent = navigator.userAgent;
	this.dom = document.getElementById?1:0;
	this.opera5 = this.agent.indexOf("Opera 5")>-1
	this.ie5 = (this.ver.indexOf("MSIE 5") > -1 && this.dom && !this.opera5)?1:0; 
	this.ie6 = (this.ver.indexOf("MSIE 6") > -1 && this.dom && !this.opera5)?1:0;
	this.ie4 = (document.all && !this.dom && !this.opera5)?1:0;
	this.ie = this.ie4 || this.ie5 || this.ie6;
	this.mac = this.agent.indexOf("Mac") > -1;
	this.ns6 = (this.dom && parseInt(this.ver) >= 5) ?1:0; 
	this.ns4 = (document.layers && !this.dom)?1:0;
	this.bw=(this.ie6 || this.ie5 || this.ie4 || this.ns4 || this.ns6 || this.opera5);
	return this;
}

var bw = new lib_bwcheck();

/*** variables you can configure ***/

FoldNumber = 9;					//How many toplinks do you have?
var stayFolded = true;			//Stay open when you click a new toplink?
foldImg = 1;					//Do you want images (if not set to 0 and remove the images from the body)?
mainOffsetY = 0;				//Vertical space adjustment between the main items, in pixels.

var imagePath = 'http://redgum.bendigo.latrobe.edu.au/~jndonker/pictures/';

//This is the default image.
//Remember to change the actual images in the page as well, but remember to keep the name of the image.
var unImg = new Image();
unImg.src = imagePath + 'foldoutmenu_arrow.gif';

var exImg=new Image();					//Making an image variable...
exImg.src = imagePath + 'foldoutmenu_arrow_open.gif';	//...this is the source of the image that it changes to when the menu expands.

// NOTE: if you change the position of divCont from absolute to relative, you can put the foldoutmenu in a table.
// HOWEVER it will no longer work in netscape 4. If you wish to support netscape 4, you have to use absolute positioning.

/*** There should be no need to change anything beyond this. ***/

// A unit of measure that will be added when setting the position of a layer.
var px = bw.ns4||window.opera?"":"px";

if(navigator.userAgent.indexOf('Opera') > -1 && document.getElementById) //Opera 5 resize fix.
{ 
	scrX= innerWidth; scrY= innerHeight;
	document.onmousemove= function(){
		if(scrX < innerWidth - 10 || scrY < innerHeight - 10 || scrX > innerWidth + 10 || scrY > innerHeight + 10)
		{
			scrX = innerWidth;
			scrY = innerHeight;
			initFoldout();
		}
	};
}

//object constructor...
function makeMenu(obj, nest)
{
	nest = (!nest)?"":'document.'+nest+'.';
	this.el = bw.ie4?document.all[obj]:bw.ns4?eval(nest+'document.'+obj):document.getElementById(obj);	
   	this.css = bw.ns4?this.el:this.el.style;
	this.ref = bw.ns4?this.el.document:document;		
	this.x = (bw.ns4 || bw.opera5)?this.css.left:this.el.offsetLeft;
	this.y = (bw.ns4 || bw.opera5)?this.css.top:this.el.offsetTop;
	this.h = (bw.ie || bw.ns6)?this.el.offsetHeight:bw.ns4?this.ref.height:bw.opera5?this.css.pixelHeight:0;
    this.vis = b_vis;
	this.hideIt = b_hideIt;
    this.showIt = b_showIt;
    this.moveIt = b_moveIt;
	return this;
}
//object methods...
function b_showIt()
{
	this.css.visibility = 'visible';
}

function b_hideIt()
{
	this.css.visibility='hidden'
}

function b_vis()
{
	if(this.css.visibility == 'hidden' || this.css.visibility == 'HIDDEN' || this.css.visibility == 'hide') 
		return true;
}

function b_moveIt(x,y)
{
	this.x = x; 
	this.y = y; 
	this.css.left = this.x + px; 
	this.css.top=this.y + px;
}

/************************************************************************************
This is the function that changes the sub menus to folded or unfolded state.
************************************************************************************/
function menu(num)
{
	if(bw.bw)
	{
		if (!stayFolded)
		{
			for (var i=0; i<oSub.length; i++)
			{
				if (i!=num)
				{
					oSub[i].hideIt()
					if (foldImg)oTop[i].ref["imgA"+i].src = unImg.src
				}
			}
			for(var i=1; i<oTop.length; i++)
			{
				oTop[i].moveIt(0,oTop[i-1].y+oTop[i-1].h)
			}
		}
		if (oSub[num].vis())
		{
			oSub[num].showIt()
			if (foldImg)oTop[num].ref["imgA"+num].src = exImg.src
		}
		else
		{
			oSub[num].hideIt()
			if(foldImg)oTop[num].ref["imgA"+num].src = unImg.src
		}
		for(var i=1; i<oTop.length; i++)
		{ 
			if (!oSub[i-1].vis()) 
				oTop[i].moveIt(0,oTop[i-1].y+oTop[i-1].h+oSub[i-1].h+mainOffsetY)
			else 
				oTop[i].moveIt(0,oTop[i-1].y+oTop[i-1].h+mainOffsetY)
		}
	}
}

/*********************************************************************
The init function... there should be no need to change anything here.
*********************************************************************/
function initFoldout()
{
	//Fixing the browsercheck for opera... this can be removed if the browsercheck has been updated!!
	bw.opera5 = (navigator.userAgent.indexOf("Opera") > -1 && document.getElementById)?true:false
	if (bw.opera5) 
		bw.ns6 = 0;

	oTop = new Array();
	oSub = new Array();
	//Making the objects and hiding the subs...
	for (var i=0; i<FoldNumber; i++)
	{
		oTop[i] = new makeMenu('divTop'+i,'divCont');
		oSub[i] = new makeMenu('divSub'+i,'divCont.document.divTop'+i);
		oSub[i].hideIt();
	}
	
	//Positioning the top objects...
	oTop[0].moveIt(0,0);
	for (var i=1; i<oTop.length; i++)
	{
		oTop[i].moveIt(0, oTop[i-1].y+oTop[i-1].h+mainOffsetY)
	}
	
	//Making the containing menu object and showing it...
	oCont = new makeMenu('divCont')
	oCont.showIt()
}

// If the browser is ok, the script is started onload...
if(bw.bw) onload = initFoldout;