//  jjb_menu.js
//  Adapted from CascadingMenus.js by Angus Turnbull
//  Rev. 091205

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

// From Laura Lemay's book...
var agt = navigator.userAgent.toLowerCase();
// alert("agt = " + agt);
var is_major = parseInt(navigator.appVersion);
var is_minor = parseFloat(navigator.appVersion);
var is_nav = (
 (agt.indexOf('mozilla') != -1) 
 && (agt.indexOf('spoofer') == -1)
 && (agt.indexOf('compatible') == -1)
 && (agt.indexOf('opera') == -1)
 && (agt.indexOf('webtv') == -1));
var is_nav4up = (is_nav && (is_major >= 4));
var is_ie = (agt.indexOf("msie") != -1);
var is_ie4up = (is_ie && (is_major >= 4));

var xloc;

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();

// Menu label justification.
var justf = 'center';

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() {
var wwid;
if (!isDOM && !isIE4 && !isNS4) return;

if (is_nav4up) {
 wwid = window.innerWidth;
}
else if (is_ie4up) {
// wwid = 700; // how to get window width in IE???
 wwid = document.body.clientWidth;
}
else {
 wwid = 700; // how to get window width in IE???
}

// alert("width = " + wwid);
xloc = ((wwid - mWidth) / 2) + 25;
with (menu[0][0]) x = xloc; // reset the horiz pos if resized

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;

// If resizing, erase previous item on screen (rhh)
if (ref != null) {
 ref.visibility = 'hidden';
}

// 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.
// (Expressions below were (h - 7) and (w - 8) -- rhh)
str += '<table width="' + (w - 1) + '" border="0" cellspacing="0" cellpadding="' 
 + (!isNS4 && borderClass ? 3 : 0) 
 + '"><tr><td align="' + justf + '" valign="middle" height="' 
 + (h - 1) + '">' + '<a class="' + textClass + '" href="' + href 
 + '"' + (frame ? ' target="' + frame + '">' : '>') + '&nbsp;' + 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';
 }
}

// -- Menu Definition --

var menu = new Array();
var defOver = '#660000', defBack = '#000000';
// var pullDownColor = "#888888";

// Default 'length' of menu items - item height if menu is vertical, 
// width if horizontal.

// var defLength = 104; // horizontal menu value
var defLength = 24;  // vertical menu value
var Spc = 0;

var mWidth = 420; // sum of p4's in menu[0]
var mn = 0;
var itm = 0;

// Menu 0 is the special 'root' menu from which everything else arises.
// Position Menu Here: it's positioned at (p3, p4) and is p5 pixels high.
mn = 0;
itm = 0;
menu[0] = new Array();
menu[0][itm++] = new Menu(false, '', xloc, 110, 20, defOver, defBack, '', 'bbb');
// The 'length' of each of these items is p4, and there is spacing of 
// p5 to the next item.  p6 selects a submenu.
menu[0][itm++] = new Item('Home', 'home.html', '', 80, 10, 1);
menu[0][itm++] = new Item('Guitars', 'guitars.html', '', 80, 10, 2);
menu[0][itm++] = new Item('Dealers', 'dealers.html', '', 80, 10, 0);
menu[0][itm++] = new Item('Photos', 'photos.html', '', 80, 10, 3);
menu[0][itm++] = new Item('Contact Us', 'contact.html', '', 100, 10, 0);

// -- Home menu --
mn++;
itm = 0;
menu[mn] = new Array();
menu[mn][itm++] = new Menu(true, '', 0, 24, 110, defOver, defBack, 'itemBorder', 'bbb');
menu[mn][itm++] = new Item('The Builder', 'julius.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('The Shop', 'shop.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('Listen', 'listen.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('Site Map', 'site_map.html', '', defLength, Spc, 0);

// Next pull-down menu.
// -- Guitars --
mn++;
itm = 0;
menu[mn] = new Array();
menu[mn][itm++] = new Menu(true, '', 0, 24, 120, defOver, defBack, 'itemBorder', 'bbb');
menu[mn][itm++] = new Item('Models', 'guitars.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('Options', 'options.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('Construction', 'construction.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('OM', 'model_om.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('OM Cutaway', 'model_om_cutaway.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('OM-45', 'model_om45.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('00-12', 'model_00-12.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('000-12', 'model_000-12.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('000-12-Koa', 'model_000-12-koa.html', '', defLength, Spc, 0);
// menu[mn][itm++] = new Item('L-00', 'model_L-00.html', '', defLength, Spc, 0);
// menu[mn][itm++] = new Item('Dreadnought', 'model_dreadnought.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('Hayride', 'model_hayride.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('Barndance', 'model_barndance.html', '', defLength, Spc, 0);

// Next pull-down menu.
// -- Photos --
mn++;
itm = 0;
menu[mn] = new Array();
// -- Horizontal menu --
// menu[2][0] = new Menu(false, '', -100, 24, 24, defOver, defBack, 'itemBorder', 'bbb');
// -- Vertical menu --
menu[mn][itm++] = new Menu(true, '', 0, 24, 160, defOver, defBack, 'itemBorder', 'bbb');
menu[mn][itm++] = new Item('Construction', 'photos_guitars.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('Workshop', 'photos_shop.html', '', defLength, Spc, 0);
// menu[mn][itm++] = new Item('Shop Tour', 'shop_tour.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('Clients', 'clients.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('Special Projects', 'projects.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('Shows', 'photos_shows.html', '', defLength, Spc, 0);

// Next pull-down menu.
// mn++;
// itm = 0;
// menu[mn] = new Array();
// menu[mn][itm++] = new Menu(true, '', 0, 24, 100, defOver, defBack, 'itemBorder', 'bbb');
// menu[mn][itm++] = new Item('Options', 'options.html', '', defLength, Spc, 0);
// menu[mn][itm++] = new Item('Dealers', 'dealers.html', '', defLength, Spc, 0);

// -- End of Menu Definition -- 

// 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);
}

// EOF