//<![CDATA[

//*****************************************************************************
// Do not remove this notice.
//
// Copyright 2000 by Mike Hall.
// See http://www.brainjar.com for terms of use.
//*****************************************************************************

//----------------------------------------------------------------------------
// Code to determine the browser and version.
//----------------------------------------------------------------------------

function Browser()
{
	var ua, s, i;

	this.isIE = false; // Internet Explorer
	this.isNS = false; // Netscape
	this.isSafari = false; // Safari
	this.isMac = false; // Mac OS
	this.isWindows = false; // Windows OS
	this.version = null;

	ua = navigator.userAgent;

	s = "Mac";
	if ((i = ua.indexOf(s)) >= 0)
	{
		this.isMac = true;
	}

	s = "Windows";
	if ((i = ua.indexOf(s)) >= 0)
	{
		this.isWindows = true;
	}

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

	// Treat any other "Gecko" browser as NS 6.1.

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

var browser = new Browser();

//----------------------------------------------------------------------------
// Code for handling the menu bar and active button.
//----------------------------------------------------------------------------

var activeButton = null;

// Capture mouse clicks on the page so any active button can be deactivated.

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

function pageMousedown(event)
{
	var el;

	// If there is no active button, exit.

	if (activeButton == null)
	{
		return;
	}

	// Find the element that was clicked on.

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

	// If the active button was clicked on, exit.

	if (el == activeButton)
	{
		return;
	}

	// If the element is not part of a menu, reset and clear the active button.

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

	// 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;

	// 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";

	// 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";

	// Hide the SOEditor editing region to prevent flickering with the menu overlap

  	if (browser.isIE)
  	{
		var editorElements = document.getElementsByTagName("editor", "so");
		if (editorElements.length > 0)
		{
			for (var i = 0; i < editorElements.length; i++)
			{
				editorElements[i].style.display = "none";
			}
		}
	}

	// Hide windowed elements within the menu div region for IE browsers

	if (browser.isIE && browser.isWindows)
	{
		var iFrame = document.getElementById("ifrMainMenu");
		iFrame.style.left = button.menu.style.left;
		iFrame.style.top = button.menu.style.top;
		iFrame.style.width = button.menu.clientWidth + 4;
		iFrame.style.height = button.menu.clientHeight + 4;
		iFrame.style.visibility = "visible";
	}
}

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";

		// Show the SOEditor editing region if it exists

		if (browser.isIE)
		{
			var editorElements = document.getElementsByTagName("editor", "so");
			if (editorElements.length > 0)
			{
				for (var i = 0; i < editorElements.length; i++)
				{
					editorElements[i].style.display = "inline";
				}
			}
		}

		// Show windowed elements hidden by the menu div region for IE browsers

		if (browser.isIE)
		{
			iFrame = document.getElementById("ifrMainMenu");
			iFrame.style.visibility = "hidden";
		}
	}
}

//----------------------------------------------------------------------------
// 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);
		}
	}

	// Get position for submenu based on the menu item.

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

	// Adjust submenu for Safari browsers

	if (browser.isSafari)
	{
		x -= 9;
		y -= 10;
	}

	// Adjust position to fit in view.

	var maxX, maxY;

	if (browser.isNS)
	{
		maxX = window.scrollX + window.innerWidth;
		maxY = window.scrollY + window.innerHeight;
	}
	if (browser.isIE)
	{
		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));

	// Position and show it.

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

	// Hide windowed elements within the menu div region for IE browsers

	if (browser.isIE && browser.isWindows)
	{
		iFrame = document.getElementById("ifrSubMenu");
		iFrame.style.left = item.subMenu.style.left;
		iFrame.style.top = item.subMenu.style.top;
		iFrame.style.width = item.subMenu.clientWidth + 4;
		iFrame.style.height = item.subMenu.clientHeight + 4;
		iFrame.style.visibility = "visible";
	}

	// 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";

		// Show windowed elements hidden by the menu div region for IE browsers

		if (browser.isIE)
		{
			iFrame = document.getElementById("ifrSubMenu");
			iFrame.style.visibility = "hidden";
		}

		menu.activeItem.subMenu = null;
	}
	removeClassName(menu.activeItem, "menuItemHighlight");

	menu.activeItem = 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";
  }

  // 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";
  }

  // 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;
}

//]]>