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)', 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() {
 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';
 }
}






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);
}



function moveRoot()
{
 with(menu[0][0].ref) left = ((parseInt(left) < 100) ? 100 : 5);
}