// (c) 2000 by Mike Hall       - http://www.brainjar.com
// (c) 2004 by Ludovic Baillet - http://www.baillet.org

function Browser()
{
  var ua,s,i

  this.isIE    = false;  // Internet Explorer
  this.isNS    = false;  // Netscape
  this.version = null

  ua = navigator.userAgent

  s = "MSIE"
  if ((i=ua.indexOf(s))>=0)
  {
    this.isIE = true
    this.version = parseFloat(ua.substr(i + s.length))
    return
  }

  s = "Netscape6/"
  if ((i = ua.indexOf(s))>=0)
  {
    this.isNS = true
    this.version = parseFloat(ua.substr(i + s.length))
    return
  }

  s = "Gecko"
  if ((i = ua.indexOf(s))>=0)
  {
    this.isNS = true
    this.version = 6.1
    return
  }
}

var browser = new Browser()

var activeButton = null

if (browser.isIE)
  document.onmousedown = pageMousedown
else
  document.addEventListener("mousedown", pageMousedown, true)

function pageMousedown(event)
{
  var el

  if (activeButton == null)
    return

  if (browser.isIE)
    el = window.event.srcElement
  else
    el = (event.target.tagName ? event.target : event.target.parentNode)

  if (el == activeButton)
    return

  if (getContainerWith(el, "DIV", "menu") == null)
  {
    resetButton(activeButton)
    activeButton = null
  }
}

function buttonClick(event, menuId)
{
  var button

  if (browser.isIE)
    button = window.event.srcElement
  else
    button = event.currentTarget

  button.blur()

  if (button.menu == null)
  {
    button.menu = document.getElementById(menuId)
    if (button.menu.isInitialized == null)
      menuInit(button.menu)
  }

  if (button.onmouseout == null)
    button.onmouseout = buttonOrMenuMouseout

  if (button == activeButton)
    return false

  if (activeButton != null)
    resetButton(activeButton)

  if (button != activeButton)
  {
    depressButton(button)
    activeButton = button
  }
  else
    activeButton = null

  return false
}

function buttonMouseover(event, menuId)
{
  var button

  if (activeButton == null)
  {
    buttonClick(event, menuId)
    return
  }

  if (browser.isIE)
    button = window.event.srcElement
  else
    button = event.currentTarget

  if (activeButton != null && activeButton != button)
    buttonClick(event, menuId)
}

function depressButton(button)
{
  var x, y

  button.className += " menuButtonActive"

  if (button.onmouseout == null)
    button.onmouseout = buttonOrMenuMouseout
  if (button.menu.onmouseout == null)
    button.menu.onmouseout = buttonOrMenuMouseout

  x = getPageOffsetLeft(button)
  y = getPageOffsetTop(button) + button.offsetHeight

  if (browser.isIE)
  {
    x += button.offsetParent.clientLeft
    y += button.offsetParent.clientTop
  }

  button.menu.style.left = x + "px"
  button.menu.style.top  = y + "px"
  button.menu.style.visibility = "visible"
}

function resetButton(button)
{
  removeClassName(button, "menuButtonActive")

  if (button.menu != null)
  {
    closeSubMenu(button.menu)
    button.menu.style.visibility = "hidden"
  }
}

function menuMouseover(event)
{
  var menu

  if (browser.isIE)
    menu = getContainerWith(window.event.srcElement, "DIV", "menu")
  else
    menu = event.currentTarget

  if (menu.activeItem != null)
    closeSubMenu(menu)
}

function menuItemMouseover(event, menuId)
{
  var item,menu,x,y

  if (browser.isIE)
    item = getContainerWith(window.event.srcElement, "A", "menuItem")
  else
    item = event.currentTarget
  menu = getContainerWith(item, "DIV", "menu")

  if (menu.activeItem != null)
    closeSubMenu(menu)
  menu.activeItem = item

  item.className += " menuItemHighlight"

  if (item.subMenu == null)
  {
    item.subMenu = document.getElementById(menuId)
    if (item.subMenu.isInitialized == null)
      menuInit(item.subMenu)
  }

  if (item.subMenu.onmouseout == null)
    item.subMenu.onmouseout = buttonOrMenuMouseout

  x = getPageOffsetLeft(item) + item.offsetWidth
  y = getPageOffsetTop(item)

  var maxX, maxY

  if (browser.isNS)
  {
    maxX = window.scrollX + window.innerWidth
    maxY = window.scrollY + window.innerHeight
  }
  if (browser.isIE)
  {
    maxX = Math.max(document.documentElement.scrollLeft, document.body.scrollLeft) +
      (document.documentElement.clientWidth != 0 ? document.documentElement.clientWidth : document.body.clientWidth)
    maxY = Math.max(document.documentElement.scrollTop, document.body.scrollTop) +
      (document.documentElement.clientHeight != 0 ? document.documentElement.clientHeight : document.body.clientHeight)
  }
  maxX -= item.subMenu.offsetWidth
  maxY -= item.subMenu.offsetHeight

  if (x > maxX)
    x = Math.max(0, x - item.offsetWidth - item.subMenu.offsetWidth
      + (menu.offsetWidth - item.offsetWidth))
  y = Math.max(0, Math.min(y, maxY))

  item.subMenu.style.left = x + "px"
  item.subMenu.style.top  = y + "px"
  item.subMenu.style.visibility = "visible"

  if (browser.isIE)
    window.event.cancelBubble = true
  else
    event.stopPropagation()
}

function closeSubMenu(menu)
{

  if (menu == null || menu.activeItem == null)
    return

  if (menu.activeItem.subMenu != null)
  {
    closeSubMenu(menu.activeItem.subMenu)
    menu.activeItem.subMenu.style.visibility = "hidden"
    menu.activeItem.subMenu = null
  }
  removeClassName(menu.activeItem, "menuItemHighlight")
  menu.activeItem = null
}

function buttonOrMenuMouseout(event)
{
  var el

  if (activeButton == null)
    return

  if (browser.isIE)
    el = window.event.toElement
  else if (event.relatedTarget != null)
      el = (event.relatedTarget.tagName ? event.relatedTarget : event.relatedTarget.parentNode)

  if (getContainerWith(el, "DIV", "menu") == null)
  {
    resetButton(activeButton)
    activeButton = null
  }
}

function menuInit(menu)
{
  var itemList,spanList
  var textEl,arrowEl
  var itemWidth
  var w,dw
  var i,j

  if (browser.isIE)
  {
    menu.style.lineHeight = "2.5ex"
    spanList = menu.getElementsByTagName("SPAN")
    for (i = 0; i < spanList.length; i++)
      if (hasClassName(spanList[i], "menuItemArrow"))
	  {
        spanList[i].style.fontFamily = "Webdings"
        spanList[i].firstChild.nodeValue = "4"
      }
  }

  itemList = menu.getElementsByTagName("A")
  if (itemList.length > 0)
    itemWidth = itemList[0].offsetWidth
  else
    return

  for (i = 0; i < itemList.length; i++)
  {
    spanList = itemList[i].getElementsByTagName("SPAN")
    textEl  = null
    arrowEl = null
    for (j = 0; j < spanList.length; j++)
	{
      if (hasClassName(spanList[j], "menuItemText"))
        textEl = spanList[j]
      if (hasClassName(spanList[j], "menuItemArrow"))
        arrowEl = spanList[j]
    }
    if (textEl != null && arrowEl != null)
      textEl.style.paddingRight = (itemWidth
        - (textEl.offsetWidth + arrowEl.offsetWidth)) + "px"
  }

  if (browser.isIE)
  {
    w = itemList[0].offsetWidth
    itemList[0].style.width = w + "px"
    dw = itemList[0].offsetWidth - w
    w -= dw
    itemList[0].style.width = w + "px"
  }

  menu.isInitialized = true
}

function getContainerWith(node, tagName, className)
{

  while (node != null)
  {
    if (node.tagName != null && node.tagName == tagName &&
        hasClassName(node, className))
      return node
    node = node.parentNode
  }

  return node
}

function hasClassName(el, name)
{
  var i,list

  list = el.className.split(" ")
  for (i = 0; i < list.length; i++)
    if (list[i] == name)
      return true

  return false
}

function removeClassName(el, name)
{
  var i,curList,newList

  if (el.className == null)
    return

  newList = new Array()
  curList = el.className.split(" ")
  for (i = 0; i < curList.length; i++)
    if (curList[i] != name)
      newList.push(curList[i])
  el.className = newList.join(" ")
}

function getPageOffsetLeft(el)
{
  var x

  x = el.offsetLeft
  if (el.offsetParent != null)
    x += getPageOffsetLeft(el.offsetParent)

  return x
}

function getPageOffsetTop(el)
{
  var y

  y = el.offsetTop
  if (el.offsetParent != null)
    y += getPageOffsetTop(el.offsetParent)

  return y
}