<!-- Original:  Angus Turnbull -->
<!-- Web Site:  http://gusnz.cjb.net -->

<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! http://javascript.internet.com -->

<!-- Begin

var isDOM; 
var isIE4;
var isNS4;

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)', 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() {
  init_menu_array();
  isDOM = (document.getElementById ? true : false); 
  isIE4 = ((document.all && !isDOM) ? true : false);
  isNS4 = (document.layers ? true : false);
  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; ';
	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 + '" 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 : 2) + '"><tr><td align="left" height="' + (h - 7) + '">' + '<a class="' + textClass + '" href="' + href + '"' + (frame ? ' target="' + frame + '">' : '>') + text + '</a></td>';
      str += '<table width="' + (w - 8) + '" border="0" cellspacing="0" cellpadding="' + (!isNS4 && borderClass ? 3 : 2) + '"><tr><td align="left" height="' + h + '">' + '<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');
      var curr_x = menu[currMenu][0].x, curr_y = menu[currMenu][0].y;
      document.getElementsByTagName('body').item(0).appendChild(newDiv);
      newDiv.innerHTML = str;
      ref = newDiv.style;
      ref.position = 'absolute';
      ref.visibility = 'hidden';
      if (menu[currMenu][0].parentMenu) {
	curr_x += menu[parentMenu][0].x + menu[parentMenu][0].width;
	curr_y += menu[parentMenu][0].y + ((menu[currMenu][0].parentItem-1) * (menu[parentMenu][parentItem].length+menu[parentMenu][parentItem].spacing));
	menu[currMenu][0].x = curr_x;
	menu[currMenu][0].y = curr_y;
      }
      //ref.left = menu[currMenu][0].x + 'px';
      //ref.top = menu[currMenu][0].y + 'px';
      ref.left = curr_x + 'px';
      ref.top = curr_y + 'px';
    }

    // 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';
    ref.visibility = 'hidden';
  }
}

// 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 function rewrites the menus if the browser window is resized. this is necessary because
//the menu is centered, and the position of the submenus are based on browser window width.
//the function should be called in the onResize attribute of the body tag.

function win_resized() {
 var new_middle;

  if (navigator.userAgent.indexOf('MSIE') != -1) {
    new_middle = document.body.clientWidth/2;
  }
  else {
    new_middle = window.innerWidth/2;
  }

  if (win_middle != new_middle) {
    hideAllBut(0);
    win_middle = new_middle;
    writeMenus();
  }
}

// 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);
}

//dropdown rollover background and background
var defOver = 'b6f2eb', defBack = '#ebf4f3';
var defLength = 22;

var menu = new Array();
var win_middle;

// this is called from the writeMenus() function above. its purpose is to re-init the
// menu array whenever the browser window is resized. see also win_resized() function.
function init_menu_array() {
var width;
if (navigator.userAgent.indexOf('MSIE') != -1) {
  width = document.body.clientWidth;
}
else {
  width = window.innerWidth;
}
win_middle = width/2;

menu[0] = new Array();
menu[0][0] = new Menu(true, '', 0, 0, 24, defOver, defBack, '', 'itemText');
menu[0][1] = new Item('Services',     '#', '', defLength, 0, 1);


menu[1] = new Array();
menu[1][0] = new Menu(true, '>', 380, 280, 146, defOver, defBack, 'itemBorder', 'itemText');
menu[1][1] = new Item('Professional Services', 'services.html', '', defLength, 0, 0);
menu[1][2] = new Item('Services to the Public', 'servicespublic.html', '', defLength, 0, 0);


}

//  End -->