//<![CDATA[

//----------------------------------------------------------------------------
// Code to determine the browser and version.
//----------------------------------------------------------------------------
function Browser() 
{
  var ua, s, i;

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

  ua = navigator.userAgent;

  s = "Opera";
  if ((i = ua.indexOf(s)) >= 0) 
  {
    this.isOP = 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;
  }
  // Treat any other "Gecko" browser as Netscape 6.1.

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

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

var browser = new Browser();

//----------------------------------------------------------------------------
// Code for handling the menu bar and active button.
//----------------------------------------------------------------------------
var activeButton = null;

function buttonClick(event, menuId) 
{
  var button;
  // Get the target button element.
  if (browser.isIE) button = window.event.srcElement;
  else button = event.currentTarget;
  // Blur focus from the link to remove that annoying outline.
  button.blur();
  // Associate the named menu to this button if not already done. Additionally, initialize menu display.
  if (button.menu == null) {
    button.menu = document.getElementById(menuId);
    if (button.menu.isInitialized == null) menuInit(button.menu);
  }
  // Set mouseout event handler for the button, if not already done.
  if (button.onmouseout == null) button.onmouseout = buttonOrMenuMouseout;
  // Exit if this button is the currently active one.
  if (button == activeButton) return false;
  // Reset the currently active button, if any.
  if (activeButton != null) resetButton(activeButton);
  // Activate this button, unless it was the currently active one.
  if (button != activeButton) 
  {
    depressButton(button);
    activeButton = button;
  } else activeButton = null;
  return false;
}

function buttonMouseover(event, menuId) 
{
  var button;
  // Activates this button's menu if no other is currently active.
  if (activeButton == null) 
  {
    buttonClick(event, menuId);
    return;
  }
  // Find the target button element.
  if (browser.isIE) button = window.event.srcElement;
  else button = event.currentTarget;
  // If any other button menu is active, make this one active instead.
  if (activeButton != null && activeButton != button) buttonClick(event, menuId);
}

function depressButton(button) 
{
  var x, y;
  // Update the button's style class to make it look like it's depressed.
  button.className += " menuButtonActive";
  // Set mouseout event handler for the button, if not already done.
  if (button.onmouseout == null) button.onmouseout = buttonOrMenuMouseout;
  if (button.menu.onmouseout == null) button.menu.onmouseout = buttonOrMenuMouseout;
  // Position the associated drop down menu under the button and show it.
  x = getPageOffsetLeft(button);
  y = getPageOffsetTop(button) + button.offsetHeight;
  // For IE, adjust position.
  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";
  // For IE; size, position and show the menu's IFRAME as well.
  if (button.menu.iframeEl != null)
  {
    button.menu.iframeEl.style.left = button.menu.style.left;
    button.menu.iframeEl.style.top  = button.menu.style.top;
    button.menu.iframeEl.style.width  = button.menu.offsetWidth + "px";
    button.menu.iframeEl.style.height = button.menu.offsetHeight + "px";
    button.menu.iframeEl.style.display = "";
  }
}

function resetButton(button) 
{
  // Restore the button's style class.
  removeClassName(button, "menuButtonActive");
  // Hide the button's menu, first closing any sub menus.
  if (button.menu != null) 
  {
    closeSubMenu(button.menu);
    button.menu.style.visibility = "hidden";
    // For IE, hide menu's IFRAME as well.
    if (button.menu.iframeEl != null) button.menu.iframeEl.style.display = "none";
  }
}

//----------------------------------------------------------------------------
// Code to handle the menus and sub menus.
//----------------------------------------------------------------------------

function menuMouseover(event)
{
  var menu;
  // Find the target menu element.
  if (browser.isIE) menu = getContainerWith(window.event.srcElement, "DIV", "menu");
  else menu = event.currentTarget;
  // Close any active sub menu.
  if (menu.activeItem != null) closeSubMenu(menu);
}

function menuItemMouseover(event, menuId) 
{
  var item, menu, x, y;
  // Find the target item element and its parent menu element.
  if (browser.isIE) item = getContainerWith(window.event.srcElement, "A", "menuItem");
  else item = event.currentTarget;
  menu = getContainerWith(item, "DIV", "menu");
  // Close any active sub menu and mark this one as active.
  if (menu.activeItem != null) closeSubMenu(menu);
  menu.activeItem = item;
  // Highlight the item element.
  item.className += " menuItemHighlight";
  // Initialize the sub menu, if not already done.
  if (item.subMenu == null) 
  {
  	item.subMenu = document.getElementById(menuId);
    if (item.subMenu.isInitialized == null) menuInit(item.subMenu);
  }
  // Set mouseout event handler for the sub menu, if not already done.
  if (item.subMenu.onmouseout == null) item.subMenu.onmouseout = buttonOrMenuMouseout;
  // Get position for submenu based on the menu item.
  x = getPageOffsetLeft(item) + item.offsetWidth;
  y = getPageOffsetTop(item);
  // Adjust position to fit in view.
  var maxX, maxY;
  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);
  }
  if (browser.isOP) 
  {
  	maxX = document.documentElement.scrollLeft + window.innerWidth;
    maxY = document.documentElement.scrollTop  + window.innerHeight;
  }
  if (browser.isNS) 
  {
    maxX = window.scrollX + window.innerWidth;
    maxY = window.scrollY + window.innerHeight;
  }
  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));
  // Position and show the sub menu.
  item.subMenu.style.left       = x + "px";
  item.subMenu.style.top        = y + "px";
  item.subMenu.style.visibility = "visible";
  // For IE; size, position and display the menu's IFRAME as well.
  if (item.subMenu.iframeEl != null)
  {
    item.subMenu.iframeEl.style.left    = item.subMenu.style.left;
    item.subMenu.iframeEl.style.top     = item.subMenu.style.top;
    item.subMenu.iframeEl.style.width   = item.subMenu.offsetWidth + "px";
    item.subMenu.iframeEl.style.height  = item.subMenu.offsetHeight + "px";
    item.subMenu.iframeEl.style.display = "";
  }
  // Stop the event from bubbling.
  if (browser.isIE) window.event.cancelBubble = true;
  else event.stopPropagation();
}

function closeSubMenu(menu) 
{
  if (menu == null || menu.activeItem == null) return;
  // Recursively close any sub menus.
  if (menu.activeItem.subMenu != null) 
  {
    closeSubMenu(menu.activeItem.subMenu);
    menu.activeItem.subMenu.style.visibility = "hidden";
    // For IE, hide the sub menu's IFRAME as well.
    if (menu.activeItem.subMenu.iframeEl != null) menu.activeItem.subMenu.iframeEl.style.display = "none";
    menu.activeItem.subMenu = null;
  }
  // Deactivate the active menu item.
  removeClassName(menu.activeItem, "menuItemHighlight");
  menu.activeItem = null;
}

function buttonOrMenuMouseout(event) 
{
  var el;
  // If there is no active button, exit.
  if (activeButton == null) return;
  // Find the element the mouse is moving to.
  if (browser.isIE) el = window.event.toElement;
  else if (event.relatedTarget != null) el = (event.relatedTarget.tagName ? event.relatedTarget : event.relatedTarget.parentNode);
  // If the element is not part of a menu, reset the active button.
  if (getContainerWith(el, "DIV", "menu") == null) 
  {
    resetButton(activeButton);
    activeButton = null;
  }
}

//----------------------------------------------------------------------------
// Code to initialize menus.
//----------------------------------------------------------------------------

function menuInit(menu) 
{
  var itemList, spanList;
  var textEl, arrowEl;
  var itemWidth;
  var w, dw;
  var i, j;
  // For IE, replace arrow characters.
  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";
      }
  }
  // Find the width of a menu item.
  itemList = menu.getElementsByTagName("A");
  if (itemList.length > 0) itemWidth = itemList[0].offsetWidth;
  else return;
  // For items with arrows, add padding to item text to make the arrows flush right.
  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";
      // For Opera, remove the negative right margin to fix a display bug.
      if (browser.isOP) arrowEl.style.marginRight = "0px";
    }
  }
  // Fix IE hover problem by setting an explicit width on first item of the menu.
  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";
  }
  // Fix the IE display problem (SELECT elements and other windowed controls overlaying the menu) by adding an IFRAME under the menu.
  if (browser.isIE) {
    var iframeEl = document.createElement("IFRAME");
    iframeEl.frameBorder = 0;
    iframeEl.src = "javascript:false;";
    iframeEl.style.display = "none";
    iframeEl.style.position = "absolute";
    iframeEl.style.filter = "progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)";
    menu.iframeEl = menu.parentNode.insertBefore(iframeEl, menu);
  }
  // Mark menu as initialized.
  menu.isInitialized = true;
}

//----------------------------------------------------------------------------
// General utility functions.
//----------------------------------------------------------------------------

function getContainerWith(node, tagName, className) 
{
  // Starting with the given node, find the nearest containing element with the specified tag name and style class.
  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;
  // Return true if the given element currently has the given class name.
  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;
  // Remove the given class name from the element's className property.
  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;
  // Return the x coordinate of an element relative to the page.
  x = el.offsetLeft;
  if (el.offsetParent != null) x += getPageOffsetLeft(el.offsetParent);
  return x;
}

function getPageOffsetTop(el) 
{
	var y;
    // Return the x coordinate of an element relative to the page.
	y = el.offsetTop;
  	if (el.offsetParent != null) y += getPageOffsetTop(el.offsetParent);
	return y;
}
//]]>