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)', 550);
}

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.
         // 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><td 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 = '#e2dfd3', defBack = '#ffffff';

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

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

// A non-vertical menu with a few different colours and no popout indicator, as an example.
// *** MOVE ROOT MENU AROUND HERE ***  it's positioned at (5, 0) and is 17px high now.
menu[0][0] = new Menu(false, '',336,20, 15, '#ffffff', '#ececec', '', 'itemText' );

// Notice how the targets are all set to nonzero values...
// The 'length' of each of these items is 100, 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('   Our Company', '#', '', 107, 1, 1);
menu[0][2] = new Item('   Products', '../htm/products.html', '', 107, 1, 0);
menu[0][3] = new Item('   Quality Assurance', '#', '', 107, 1, 3);
menu[0][4] = new Item('   Contact Us', '../htm/contact_us.html', '', 107, 1, 6);


// File menu. Our Company drop down menu
menu[1] = new Array();
// The File menu is positioned 0px across and 18 down from its trigger, and is 100 wide.
// All text in this menu has the stylesheet class 'item' -- see the <style> section above.
// We've passed a 'greater-than' sign '>' as a popout indicator. Try an image...?
menu[1][0] = new Menu(true, '>', 0, 17, 107, defOver, defBack, 'itemBorder', 'itemText');
menu[1][1] = new Item('Profile', '../htm/profile.html', '', defLength, -1, 0);
// menu[1][2] = new Item('Site Map', '../htm/site_map.html', '', defLength, -1, 0);
menu[1][2] = new Item('Mission Statement', '../htm/mission.html', '', defLength, -1, 0);
menu[1][3] = new Item('Line Card', '../htm/line_card.html', '', defLength, -1, 0);
// menu[1][5] = new Item('Contact Us', '../htm/contact_us.html', '', defLength, -1, 0);

// Edit menu. Products drop down menu
menu[2] = new Array();
menu[2][0] = new Menu(true, '>', 0, 17, 107, defOver, defBack, 'itemBorder', 'itemText');
menu[2][1] = new Item('Circuit Breakers', '../htm/airpax.html', '', defLength, -1, 0);
menu[2][2] = new Item('Relay Sockets', '../htm/pcd2.html', '', defLength, -1, 0);
// Non-zero target means this will trigger a popout -- menu[4] which is the 'Reopen' menu.
menu[2][3] = new Item('Relays', '#', '', defLength, -1, 4);
menu[2][4] = new Item('Switches', '#', '', defLength, -1, 5);
menu[2][5] = new Item('Terminal Junction', '../htm/pcd2.html', '', defLength,-1, 0);
// menu[2][6] = new Item('Contact Us', '../htm/contact_us.html', '', defLength, -1, 0);

// Help menu. Whats New drop down menu
menu[3] = new Array();
menu[3][0] = new Menu(true, '<', 0, 17, 107, defOver, defBack, 'itemBorder', 'itemText');
menu[3][1] = new Item('ISO Certification', '../pcd/ISO.pdf', '', defLength, -1, 0);
//menu[3][2] = new Item('Market News', '../htm/news.html', '', defLength, -1, 0);
// menu[3][3] = new Item('Contact Us', '../htm/contact_us.html', '', defLength, -1, 0);

// Reopen menu
menu[4] = new Array();
// This is across but not down... a horizontal popout (with crazy stylesheets :)...
menu[4][0] = new Menu(true, '>', 108, 0, 107, '#fcfed6', '#e2dfd3', 'crazyBorder', 'crazyText');
// These items are lengthier than normal, and have extra spacing due to the fancy borders.
menu[4][1] = new Item('Babcock', '../htm/babcock.html', '', 22, -1, 0);
menu[4][2] = new Item('CII', '../htm/cii_main.html', '', 22,-1, 0);
menu[4][3] = new Item('Genicom', '../htm/genicom.html', '', 22,-1, 0);
menu[4][4] = new Item('Hartman', '#', '', 22,-1, 0);
menu[4][5] = new Item('Hi-G', '../htm/hi_g.html', '', 22,-1, 0);
menu[4][6] = new Item('MSD', '../htm/msd.html', '', 22,-1, 0);
menu[4][7] = new Item('Struthers-Dunn', '../htm/struthers.html', '', 22,-1, 0);

// Help About popout. More Products drop down drop downs
menu[5] = new Array();
// Leftwards popout with a negative x and y relative to its trigger.
menu[5][0] = new Menu(true, '>', 108, 0, 107, '#fcfed6', '#e2dfd3', 'crazyBorder', 'crazyText');
menu[5][1] = new Item('Cole Instruments', '#', '', 22, -1, 0);
menu[5][2] = new Item('Otto Controls', '#', '', 22, -1, 0);

//Contact Us drop down
menu[6] = new Array();
// The File menu is positioned 0px across and 18 down from its trigger, and is 100 wide.
// All text in this menu has the stylesheet class 'item' -- see the <style> section above.
// We've passed a 'greater-than' sign '>' as a popout indicator. Try an image...?
menu[6][0] = new Menu(true, '>', 0, 17, 107, defOver, defBack, 'itemBorder', 'itemText');
menu[6][1] = new Item('Our Team', '../htm/our_team.html', '', defLength, -1, 0);
menu[6][2] = new Item('Locate Us', '../htm/locate_us.html', '', defLength, -1, 0);
menu[6][3] = new Item('Request Info', '../htm/info.html', '', defLength, -1, 0);
menu[6][4] = new Item('Request a Quote', '../htm/quote_req.html', '', defLength, -1, 0);

// Edit menu.
// *** 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);
}