var t;

function autoOn(){
  clearTimeout(t);
}

function autoOff(){
  //t = setTimeout("killMenu()",0);
  t = setTimeout("killMenu()",750);
}

function killMenu(){
	if(activeButton != null) resetButton(activeButton);
}

var activeButton = null;

if (is_ie)
  document.onmousedown = pageMousedown;
else
  document.addEventListener("mousedown", pageMousedown, true);

function pageMousedown(event) {
  var el;

  if (activeButton == null)
    return;

  if (is_ie)
    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;
	killMenu();
  }
}

function buttonClick(event, menuId) {
  
  if (is_nav4) return false;
  if (is_mac && is_ie) return false;
  
  if (is_ie5) return false;
  
  var button;
  
  autoOn();

  if (is_ie)
    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 (activeButton != null)
    resetButton(activeButton);

    depressButton(button);
    activeButton = button;
  return false;
}

function buttonMouseover(event, menuId) {

  var button;

  if (is_ie)
    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";

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

 button.menu.style.left = x + "px";
  button.menu.style.top  = (y-1) + "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;
  autoOn();

  if (is_ie)
    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;
  
  autoOn();  

  if (is_ie)
    item = getContainerWith(window.event.srcElement, "A", "mi");
  else
    item = event.currentTarget;
  menu = getContainerWith(item, "DIV", "menu");

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

  item.className += " miHighlight";

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

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

  var maxX, maxY;

  if (is_nav) {
    maxX = window.scrollX + window.innerWidth;
    maxY = window.scrollY + window.innerHeight;
  }
  if (is_ie || is_opera) {
    maxX = (document.documentElement.scrollLeft   != 0 ? document.documentElement.scrollLeft    : document.body.scrollLeft)
         + (document.documentElement.clientWidth  != 0 ? document.documentElement.clientWidth   : document.body.clientWidth);
    maxY = (document.documentElement.scrollTop    != 0 ? 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 - 4) + "px";
  item.subMenu.style.top  = (y + 4)+ "px";
  item.subMenu.style.visibility = "visible";

  if (is_ie)
    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, "miHighlight");
  menu.activeItem = null;
}

function menuInit(menu) {

  var itemList, spanList;
  var textEl, arrowEl;
  var itemWidth;
  var w, dw;
  var i, j;

  if (is_ie) {
    menu.style.lineHeight = "2.5ex";
    spanList = menu.getElementsByTagName("SPAN");
    for (i = 0; i < spanList.length; i++)
      if (hasClassName(spanList[i], "miArrow")) {
        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], "miText"))
        textEl = spanList[j];
      if (hasClassName(spanList[j], "miArrow"))
        arrowEl = spanList[j];
    }
    if (textEl != null && arrowEl != null)
      textEl.style.paddingRight = (itemWidth 
        - (textEl.offsetWidth + arrowEl.offsetWidth)) + "px";
  }

  if (is_ie) {
    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;
}