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

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;
	}

	// 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;
var isNew = false;

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

function buttonMouseOut(event, menuId) {
	isNew = true;
	setTimeout("removeSubMenu()", 4000);
}

function removeSubMenu(){
	if (activeButton != null && isNew == true){
		resetButton(activeButton);
		activeButton = null;
	}
		
}

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

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

//----------------------------------------------------------------------------
// 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.

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

	// Set pointers.

	menu.activeItem = item;
	item.subMenu = document.getElementById(menuId);

	// 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 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";

	// 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";
		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;
}