var isMAC = ((navigator.platform == 'MacPPC' || navigator.platform == 'Mac68K') ? true : false);
var isDOM = ((document.getElementById && 
			 (!isMAC || parseInt(navigator.appVersion) > 4 && navigator.appName == "Netscape")) ? 
			 true : false
			 ); 
var isIE4 = ((document.all && !isDOM) ? true : false);
var isNS4 = (document.layers ? true : false);
var popTimer = 0;
var litNow = new Array();
var menu = new Array();
var defOver = '#666633', defBack = '#666633';
var defLength = 20;
var defX = 115;

// *** 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(bullet, text, href, frame, length, spacing, target) 
{
	this.bullet = bullet;
	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;
}

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

menu[0][0] = new Menu(true, '', 10, 50, 130, '#003300', '#003300', '', 'link2');
menu[0][1] = new Item('<A HREF="index.html"><IMG SRC="images/bullet.gif" BORDER="0" WIDTH="14" HEIGHT="14" ALT=""></A>', 'Home Page', 'index.html', '', 14, 10, 0);
menu[0][2] = new Item('<A HREF="map.html"><IMG SRC="images/bullet.gif" BORDER="0" WIDTH="14" HEIGHT="14" ALT=""></A>', 'Visit Us<br><font color="#FF3300">call for hours', 'map.html', '', 28, 10, 0);
menu[0][3] = new Item('<A HREF="bamboo.html"><IMG SRC="images/bullet.gif" BORDER="0" WIDTH="14" HEIGHT="14" ALT=""></A>', 'Bamboo Plants', 'bamboo.html', '', 14, 13, 1);
menu[0][4] = new Item('<A HREF="ornaments.html"><IMG SRC="images/bullet.gif" BORDER="0" WIDTH="14" HEIGHT="14" ALT=""></A>', 'Stone Garden Ornaments', 'ornaments.html', '', 14, 27, 0);
menu[0][5] = new Item('<A HREF="supplies.html"><IMG SRC="images/bullet.gif" BORDER="0" WIDTH="14" HEIGHT="14" ALT=""></A>', 'Bamboo Poles, Fences &amp; Tools', 'supplies.html', '', 14, 27, 2);
menu[0][6] = new Item('<A HREF="grasses.html"><IMG SRC="images/bullet.gif" BORDER="0" WIDTH="14" HEIGHT="14" ALT=""></A>', 'Ornamental Grasses', 'grasses.html', '', 14, 27, 4);
menu[0][7] = new Item('<A HREF="information.html"><IMG SRC="images/bullet.gif" BORDER="0" WIDTH="14" HEIGHT="14" ALT=""></A>', 'Information &amp; Resources', 'information.html', '', 14, 27, 3);
menu[0][8] = new Item('<A HREF="wholesale.html"><IMG SRC="images/bullet.gif" BORDER="0" WIDTH="14" HEIGHT="14" ALT=""></A>', 'Wholesale Information', 'wholesale.html', '', 28, 22, 0);
// menu[0][9] = new Item('<A HREF="http://www.enma.org/2010/overview.htm"><IMG SRC="images/akim2010banner.gif" BORDER="0" WIDTH="120" HEIGHT="178" ALT=""></A>', '', 'w', '', 28, 189, 0);
// menu[0][10] = new Item('<IMG SRC="images/gift_cert_ad.gif" BORDER="0" WIDTH="120" HEIGHT="111" ALT="">', '', '', '', 14, 24, 0);

// Bamboo Plants
menu[1] = new Array();
menu[1][0] = new Menu(true, '>', defX, 0, 95, defOver, defBack, 'itemBorder', 'link4');
menu[1][1] = new Item('', 'Bamboo Species', 'species.html', '', 2*defLength, 0, 0);
menu[1][2] = new Item('', 'Care &amp; Maintenance', 'care.html', '', 2*defLength, 0, 0);
menu[1][3] = new Item('', 'Maintenance Tools &amp; Supplies', 'tools.html', '', 3*defLength, 0, 0);
menu[1][4] = new Item('', 'Common Questions', 'questions.html', '', 2*defLength, 0, 0);

// Bamboo Poles, Fences and Construction Supplies
menu[2] = new Array();
menu[2][0] = new Menu(true, '>', defX, 0, 110, defOver, defBack, 'itemBorder', 'link4');
menu[2][1] = new Item('', 'Poles', 'poles.html', '', defLength+2, 0, 0);
menu[2][2] = new Item('', 'Fences &amp; Arbors', 'fences.html', '', 2*defLength, 0, 0);
menu[2][3] = new Item('', 'Construction Tools &amp; Supplies', 'construction.html', '', 3*defLength, 0, 0);

// Information & Resources
menu[3] = new Array();
menu[3][0] = new Menu(true, '>', defX, 0, 85, defOver, defBack, 'itemBorder', 'link4');
menu[3][1] = new Item('', 'Books &amp; Music', 'books.html', '', 2*defLength, 0, 0);
menu[3][2] = new Item('', 'Newsletter', 'newsletter.html', '', defLength+2, 0, 0);
menu[3][3] = new Item('', 'Workshops', 'workshops.html', '', defLength+2, 0, 0);
menu[3][4] = new Item('', 'Map &amp; Directions', 'map.html', '', 2*defLength, 0, 0);
//menu[3][5] = new Item('', 'Bamboo Installations', 'install.html', '', 2*defLength, 0, 0);


// Ornamental Grasses
menu[4] = new Array();
menu[4][0] = new Menu(true, '>', defX, 0, 110, defOver, defBack, 'itemBorder', 'link4');
menu[4][1] = new Item('', 'Ornamental Grass Species', 'grasses.html', '', 2*defLength, 0, 0);
// menu[4][2] = new Item('', 'Care &amp; Maintenance', 'grass_care.html', '', 2*defLength, 0, 0);
// menu[4][3] = new Item('', 'Common Questions', 'grass_questions.html', '', 2*defLength, 0, 0);

// Home Page
// menu[5] = new Array();
// menu[5][0] = new Menu(true, '>', defX, 0, 100, defOver, defBack, 'itemBorder', 'link4');
// menu[5][1] = new Item('', 'Map &amp; Directions', 'map.html', '', 2*defLength, 0, 0);


// Water Garden Plants
// menu[6] = new Array();
// menu[6][0] = new Menu(true, '>', defX, 0, 110, defOver, defBack, 'itemBorder', 'link4');
// menu[6][1] = new Item('', 'Water Garden Plant Species', 'water_species.html', '', 2*defLength, 0, 0);
// menu[6][2] = new Item('', 'Care &amp; Maintenance', 'water_care.html', '', 2*defLength, 0, 0);
// menu[6][3] = new Item('', 'Maintenance Tools &amp; Supplies', 'water_tools.html', '', 3*defLength, 0, 0);
// menu[6][4] = new Item('', 'Common Questions', 'water_questions.html', '', 2*defLength, 0, 0);

// Garden Ornaments
// menu[7] = new Array();
// menu[7][0] = new Menu(true, '>', defX, 0, 80, defOver, defBack, 'itemBorder', 'link4');
// menu[7][1] = new Item('', 'Lanterns &amp; Basins', 'lantern.html', '', 2*defLength, 0, 0);
// menu[7][2] = new Item('', 'Bamboo Crafts', 'crafts.html', '', 2*defLength, 0, 0);

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);
} 

// 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 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;
   	}
	return itemArray;
}

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);
}

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 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.
			// 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 + '; 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.
			
			str += '<table width="' + (w - 8) + '" border="0" cellspacing="0" cellpadding="' + (!isNS4 && borderClass ? 3 : 0) + '"><tr>' + (bullet ? '<td align="left" valign="top" width="16">' + bullet + '</td><td align="left" valign="top" height="' : '<td align="left" valign="top" 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';
	}
}

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

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

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