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;
var hidePopDelay=1000;
// Array showing highlighted menu items.
var litNow = new Array();

// Default colours passed to most menu constructors 
var defOver = '#000066', defBack = '#ffffff';

// Default 'length' of menu items - item height if menu is vertical, width if horizontal.
var defLength = 22;


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)+'px';
			top = parseInt(thisY + menu[targetNum][0].y)+'px';
			visibility = 'visible';
		}
	}
}


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


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;
	//window.status=(isDOM?'isDom':'')+(isIE4?'  isIE4':'')+(isNS4?'  isNS4':'');
	//window.status=(isDom ? 'isDom' : '');
	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;
					//window.status+='  Y='+itemY;
					// 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.
					// Thanks to Paul Maden (www.paulmaden.com) for helping debug this in IE4, apparently
					// the width must be a miniumum of 3 for it to work in that browser.
					if (isDOM || isIE4) 
						{	
						//str += '<div  id="' + itemID + '" style="position: absolute; left: ' + itemX + 'px; top: ' + itemY + 'px; width: ' + w + 'px; height: ' + h + 'px; visibility: inherit; ';
						str += '<div  id="' + itemID + '" style="position: absolute; left: ' + itemX + 'px; top: ' + itemY + 'px; width:  ' + w + 'px; height: ' + h + 'px; visibility: inherit; ';
						if (backCol) str += 'background: ' + backCol + '; ';
						str += '" ';
						}
					if (isNS4) 
						{	
						str += '<layer   id="' + itemID + '" left="' + itemX + 'px" top="' + itemY + 'px" width="' +  w + 'px" height="' + h + 'px" 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.
					str += '<table width=100% border=0 cellpadding=2 cellspacing=0><tr valign=middle>';
					str += '<td>';				
					str += '<a class="' + textClass + '" href="' + href + '"' + (frame ? ' target="' + frame + '">' : '>') + text;
					str +=' </a>';
					str += '</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 width=20>';
							str +=  popInd ;
							str += '</td>';

						}
					}
					str += '<td width=1px><img src=/imgs/spacer.gif height='+h+'px width=1px></td></tr></table>';
					str += '' + (isNS4 ? '</layer>\n' : '</div>\n');
					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;
					//newDiv.className='menu';
					ref = newDiv.style;
					ref.position = 'absolute';
					ref.visibility = 'hidden';
					ref.left=x+'px';
					ref.top=y+'px';
					/*ref.width=width+'px';*/
					newDiv.id='menu'+currMenu;
				
				}

				// 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+'px';
			ref.top = y+'px';
			ref.visibility = 'visible';
	}
	//txthldr=document.getElementById('txthldr');
	//txthldr=document.forms.txt['txthldr'];
	//txthldr.value=document.getElementById('menu0').innerHTML;
	//txthldr.value=document.body.innerHTML;

	//menu=document.getElementsByTagName('div');
	//a=menu[1].innerHTML;
	//alert(a);
	//show=document.getElementByid('show');
	//show.innerTXT=menu.innerHTML;
}

// 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.

// The 'length' and 'width' of an item depends on its orientation -- length is how long the item runs for 

var menu = new Array();

// *** OPTIONAL CODE FROM HERE DOWN ***
// 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);
}

//added by bobsuk 05.07.2006
addLoadEvent(writeMenus);