//  coment_menu.js
//  Copyright 2006 NetChromatics, Inc. of Concord, MA.  All Rights Reserved.
//  Adapted from CascadingMenus.js by Angus Turnbull
//  Rev. 061104-1

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, yloc;
var transparent = false;
var transparency = 0.8;

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);
    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 + '; ';
            if (transparent) {
                str += 'filter:alpha(opacity=' + transparency*100 + '); '
                + ' -moz-opacity: ' + transparency + '; '
                + ' opacity: ' + transparency + '; '
                + ' -khtml-opacity: ' + transparency + '; ';
            }
            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 = '#444444';
var defBack = '#888888';

var HomBack = '#BB6600', HomHover = '#DD8800';
var ComBack = '#AA5500', ComHover = '#BB6600';
var EntBack = '#339900', EntHover = '#44AA00';

// 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 = 440; // sum of p4's in menu[0]
var mn = 0;
var itm = 0;

yloc = 120;

// 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, yloc, 24, 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', 'index.html', '', 110, 10, 1);
menu[0][itm++] = new Item('Communication', 'comm.html', '', 110, 10, 2);
menu[0][itm++] = new Item('Entertainment', 'entertainment.html', '', 110, 10, 3);
menu[0][itm++] = new Item('Inquire', 'inquiry.html', '', 110, 10, 0);

// -- First sub-menu -- Home (1)
mn++;
itm = 0;
menu[mn] = new Array();
menu[mn][itm++] = new Menu(true, '', 0, 24, 108, HomHover, HomBack, 'itemBorder', 'bbb');
menu[mn][itm++] = new Item('About', 'about.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('Site Map', 'site_map.html', '', defLength, Spc, 0);

// Next sub-menu -- Communications (2)
mn++;
itm = 0;
menu[mn] = new Array();
menu[mn][itm++] = new Menu(true, '', -71, 24, 180, ComHover, ComBack, 'itemBorder', 'bbb');
menu[mn][itm++] = new Item('Telephone PBX', 'pbx.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('Local Area Network', 'lan.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('Network Administration', 'netadmin.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('Conference Rooms', 'pbx.html', '', defLength, Spc, 0);

// Next sub-menu -- Entertainment (3)
mn++;
itm = 0;
menu[mn] = new Array();
menu[mn][itm++] = new Menu(true, '', 0, 24, 140, EntHover, EntBack, 'itemBorder', 'bbb');
menu[mn][itm++] = new Item('Multi Room Audio', 'indoor.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('Outdoor Audio', 'outdoor.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('Home Theatre', 'home_theatre.html', '', defLength, Spc, 0);
menu[mn][itm++] = new Item('Casual Viewing', 'casual_viewing.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