var isDOM = (document.getElementById ? true : false);
var isIE4 = ((document.all && !isDOM) ? true : false);
var isNS4 = (document.layers ? true : false);

function getRef(id) 
	{
	if (isDOM) return document.getElementById(id);
	if (isIE4) return document.all[id];
	if (isNS4) return document.layers[id];
	}

function getSty(id) 
	{
	return (isNS4 ? getRef(id) : getRef(id).style);
	}

// Hide timeout.
var popTimer = 0;

// Array showing highlighted menu items.
var litNow = new Array();

function popOver(menuNum, itemNum) 
	{
	clearTimeout(popTimer);
	hideAllBut(menuNum);
	litNow = getTree(menuNum, itemNum);
	changeCol(litNow, true);
	targetNum = menu[menuNum][itemNum].target;
	if (targetNum > 0) {
	thisX = parseInt(menu[menuNum][0].ref.left) + parseInt(menu[menuNum][itemNum].ref.left);
	thisY = parseInt(menu[menuNum][0].ref.top) + parseInt(menu[menuNum][itemNum].ref.top);
	with (menu[targetNum][0].ref) {
	left = parseInt(thisX + menu[targetNum][0].x);
	top = parseInt(thisY + menu[targetNum][0].y);
	visibility = 'visible';
	      }
	   }
	}

function popOut(menuNum, itemNum) 
	{
	if ((menuNum == 0) && !menu[menuNum][itemNum].target)
	hideAllBut(0)
	else
	popTimer = setTimeout('hideAllBut(0)', 500);
	}

function getTree(menuNum, itemNum) 
	{

	// Array index is the menu number. The contents are null (if that menu is not a parent)
	// or the item number in that menu that is an ancestor (to light it up).
	itemArray = new Array(menu.length);

	while(1) {
	itemArray[menuNum] = itemNum;
	// If we've reached the top of the hierarchy, return.
	if (menuNum == 0) return itemArray;
	itemNum = menu[menuNum][0].parentItem;
	menuNum = menu[menuNum][0].parentMenu;
	   }
	}

// Pass an array and a boolean to specify colour change, true = over colour.
function changeCol(changeArray, isOver) 
	{
	for (menuCount = 0; menuCount < changeArray.length; menuCount++) {
	if (changeArray[menuCount]) {
	newCol = isOver ? menu[menuCount][0].overCol : menu[menuCount][0].backCol;
	// Change the colours of the div/layer background.
	with (menu[menuCount][changeArray[menuCount]].ref) {
	if (isNS4) bgColor = newCol;
	else backgroundColor = newCol;
	         }
	      }
	   }
	}

function hideAllBut(menuNum) 
	{
	var keepMenus = getTree(menuNum, 1);
	for (count = 0; count < menu.length; count++)
	if (!keepMenus[count])
	menu[count][0].ref.visibility = 'hidden';
	changeCol(litNow, false);
	}

// *** MENU CONSTRUCTION FUNCTIONS ***

function Menu(isVert, popInd, x, y, width, overCol, backCol, borderClass, textClass) 
	{
	// True or false - a vertical menu?
	this.isVert = isVert;
	// The popout indicator used (if any) for this menu.
	this.popInd = popInd
	// Position and size settings.
	this.x = x;
	this.y = y;
	this.width = width;
	// Colours of menu and items.
	this.overCol = overCol;
	this.backCol = backCol;
	// The stylesheet class used for item borders and the text within items.
	this.borderClass = borderClass;
	this.textClass = textClass;
	// Parent menu and item numbers, indexed later.
	this.parentMenu = null;
	this.parentItem = null;
	// Reference to the object's style properties (set later).
	this.ref = null;
	}

function Item(text, href, frame, length, spacing, target) 
	{
	this.text = text;
	this.href = href;
	this.frame = frame;
	this.length = length;
	this.spacing = spacing;
	this.target = target;
	// Reference to the object's style properties (set later).
	this.ref = null;
	}

function writeMenus() 
	{
	if (!isDOM && !isIE4 && !isNS4) return;

	for (currMenu = 0; currMenu < menu.length; currMenu++) with (menu[currMenu][0]) {
	// Variable for holding HTML for items and positions of next item.
	var str = '', itemX = 0, itemY = 0;

	// Remember, items start from 1 in the array (0 is menu object itself, above).
	// Also use properties of each item nested in the other with() for construction.
	for (currItem = 1; currItem < menu[currMenu].length; currItem++) with (menu[currMenu][currItem]) {
	var itemID = 'menu' + currMenu + 'item' + currItem;

	// The width and height of the menu item - dependent on orientation!
	var w = (isVert ? width : length);
	var h = (isVert ? length : width);

	// Create a div or layer text string with appropriate styles/properties.
	if (isDOM || isIE4) {
	str += '<div id="' + itemID + '" style="position: absolute; left: ' + itemX + '; top: ' + itemY + '; width: ' + w + '; height: ' + h + '; visibility: inherit; ';
	if (backCol) str += 'background: ' + backCol + '; ';
	str += '" ';
	}
	if (isNS4) {
	str += '<layer id="' + itemID + '" left="' + itemX + '" top="' + itemY + '" width="' +  w + '" height="' + h + '" visibility="inherit" ';
	if (backCol) str += 'bgcolor="' + backCol + '" ';
	}
	if (borderClass) str += 'class="' + borderClass + '" ';

	// Add mouseover handlers and finish div/layer.
	str += 'onMouseOver="popOver(' + currMenu + ',' + currItem + ')" onMouseOut="popOut(' + currMenu + ',' + currItem + ')">';

	// Add contents of item (default: table with link inside).
	// In IE/NS6+, add padding if there's a border to emulate NS4's layer padding.
	// If a target frame is specified, also add that to the <a> tag.

var xx 
xx = 'e'

	str += '<table width="' + (w - 8) + '" border="0" cellspacing="0" cellpadding="' + (!isNS4 && borderClass ? 3 : 0) + '"><tr><td style="cursor:Hand" onClick="javascript:document.location.href=\'' +href + '\';" align="left" height="' + (h - 7) + '">' + '<a class="' + textClass + '" href="' + href + '"' + (frame ? ' target="' + frame + '">' : '>') + text + '</a></td>';
	if (target > 0) {

	// Set target's parents to this menu item.
	menu[target][0].parentMenu = currMenu;
	menu[target][0].parentItem = currItem;

	// Add a popout indicator.
	if (popInd) str += '<td class="' + textClass + '" align="right">' + popInd + '</td>';
	}
	str += '</tr></table>' + (isNS4 ? '</layer>' : '</div>');
	if (isVert) itemY += length + spacing;
	else itemX += length + spacing;
	}
	if (isDOM) {
	var newDiv = document.createElement('div');
	document.getElementsByTagName('body').item(0).appendChild(newDiv);
	newDiv.innerHTML = str;
	ref = newDiv.style;
	ref.position = 'absolute';
	ref.visibility = 'hidden';
	}

	// Insert a div tag to the end of the BODY with menu HTML in place for IE4.
	if (isIE4) {
	document.body.insertAdjacentHTML('beforeEnd', '<div id="menu' + currMenu + 'div" ' + 'style="position: absolute; visibility: hidden">' + str + '</div>');
	ref = getSty('menu' + currMenu + 'div');
	}

	// In NS4, create a reference to a new layer and write the items to it.
	if (isNS4) {
	ref = new Layer(0);
	ref.document.write(str);
	ref.document.close();
	}

	for (currItem = 1; currItem < menu[currMenu].length; currItem++) {
	itemName = 'menu' + currMenu + 'item' + currItem;
	if (isDOM || isIE4) menu[currMenu][currItem].ref = getSty(itemName);
	if (isNS4) menu[currMenu][currItem].ref = ref.document[itemName];
	   }
	}
	with(menu[0][0]) {
	ref.left = x;
	ref.top = y;
	ref.visibility = 'visible';
	   }
	}

	// Syntaxes: *** START EDITING HERE, READ THIS SECTION CAREFULLY! ***
	//
	// menu[menuNumber][0] = new Menu(Vertical menu? (true/false), 'popout indicator', left, top,
	// width, 'mouseover colour', 'background colour', 'border stylesheet', 'text stylesheet');
	//
	// Left and Top are measured on-the-fly relative to the top-left corner of its trigger, or
	// for the root menu, the top-left corner of the page.
	//
	// menu[menuNumber][itemNumber] = new Item('Text', 'URL', 'target frame', length of menu item,
	//  additional spacing to next menu item, number of target menu to popout);
	//
	// If no target menu (popout) is desired, set it to 0. Likewise, if your site does not use
	// frames, pass an empty string as a frame target.
	//
	// Something that needs explaining - the Vertical Menu setup. You can see most menus below
	// are 'true', that is they are vertical, except for the first root menu. The 'length' and
	// 'width' of an item depends on its orientation -- length is how long the item runs for in
	// the direction of the menu, and width is the lateral dimension of the menu. Just look at
	// the examples and tweak the numbers, they'll make sense eventually :).

	var menu = new Array();

	// Default colours passed to most menu constructors (just passed to functions, not
	// a global variable - makes things easier to change later in bulk).
	var defOver = '#556688', defBack = '#445577';

	// Default 'length' of menu items - item height if menu is vertical, width if horizontal.
	var defLength = 20;
	
	var rootMenuDropHeight = 16;

	// Menu 0 is the special, 'root' menu from which everything else arises.
	menu[0] = new Array();

	// ***  ROOT MENU AROUND HERE ***  
	menu[0][0] = new Menu(false, '', 42, 56, 15, defOver, defBack,  '', 'itemText');
	
	// Notice how the targets are all set to nonzero values...
	// The 'length' of each of these items is 40, and there is spacing of 10 to the next item.
	// Most of the links are set to '#' hashes, make sure you change them to actual files.
	menu[0][1] = new Item('<img src="/img/home.gif">', '/', '', 60, 0, 0);
	menu[0][2] = new Item('<img src="/img/products.gif">', '/products/', '', 78, 0, 1);
	menu[0][3] = new Item('<img src="/img/services.gif">', '/services/', '', 72, 0, 2);
	//menu[0][4] = new Item('<img src="/img/support.gif">', '/support/', '', 70, 0, 3);
	menu[0][4] = new Item('<img src="/img/company.gif">', '/about/', '', 77, 0, 4);


	// Products menu.
	menu[1] = new Array();
	menu[1][0] = new Menu(true, '>', 0, rootMenuDropHeight, 120, defOver, defBack, 'itemBorder', 'itemText');
	menu[1][1] = new Item('eProphet Store', '/eprophet/', '', defLength, 0, 0);
	menu[1][2] = new Item('eProphet Payroll', '/eprophetpayroll/', '', defLength, 0, 0);
	menu[1][3] = new Item('eProphet Accounting', '/eprophetadmin/', '', defLength, 0, 0);
	menu[1][4] = new Item('eP EIS', '/epeis/', '', defLength, 0, 0);
//	menu[1][4] = new Item('In Development', '/development/', '', defLength, 0, 0);

	// services menu.
	menu[2] = new Array();
	menu[2][0] = new Menu(true, '>', 0, rootMenuDropHeight, 190, defOver, defBack, 'itemBorder', 'itemText');
	menu[2][1] = new Item('I.T. Consultancy and Development', '/services/consultancy/', '', defLength, 0, 0);
	menu[2][2] = new Item('Accounting Services', '/services/accounting/', '', defLength, 0, 0);
	menu[2][3] = new Item('QA & Testing', '/services/testing/', '', defLength, 0, 0);
	menu[2][4] = new Item('3rd Party Hardware & Software', '/services/abcomit/', '', defLength, 0, 0);
	menu[2][5] = new Item('Help Desk Services', '/services/helpdesk/', '', defLength, 0, 0);

	// support menu
	menu[3] = new Array();
	menu[3][0] = new Menu(true, '<', 0, rootMenuDropHeight, 180, defOver, defBack, 'itemBorder', 'itemText');
	menu[3][1] = new Item('Log a Support Request', '/support/lognewincident/', '', defLength, 0, 0);
	menu[3][2] = new Item('Support Policies', '/supportpolicies/', '', defLength, 0, 0);
	menu[3][3] = new Item('Support Contacts', '/partners/', '', defLength, 0, 0);

	// company menu
	menu[4] = new Array();
	menu[4][0] = new Menu(true, '<', 0, rootMenuDropHeight, 90, defOver, defBack, 'itemBorder', 'itemText');
	menu[4][1] = new Item('About', '/about/', '', defLength, 0, 0);
	menu[4][2] = new Item('Employment', '/jobs/', '', defLength, 0, 0);
	menu[4][3] = new Item('Contact', '/contact/', '', defLength, 0, 0);
	menu[4][4] = new Item('Partners', '/partners/', '', defLength, 0, 0);


	// These two lines handle the window resize bug in NS4. See <body onResize="...">.
	// I recommend you leave this here as otherwise when you resize NS4's width menus are hidden.

	var popOldWidth = window.innerWidth;
	nsResizeHandler = new Function('if (popOldWidth != window.innerWidth) location.reload()');


	// This is a quick snippet that captures all clicks on the document and hides the menus
	// every time you click. Use if you want.

	if (isNS4) document.captureEvents(Event.CLICK);
	document.onclick = clickHandle;

	function clickHandle(evt)
	{
	 if (isNS4) document.routeEvent(evt);
	 hideAllBut(0);
	}


// This is just the moving command for the example.
function moveRoot()
	{
	 with(menu[0][0].ref) left = ((parseInt(left) < 100) ? 100 : 5);
	}