//*****************************************************************************
// Copyright 2000-2004 by Mike Hall. See http://www.brainjar.com for terms of use.
//*****************************************************************************

var activeButton = null;
var bMenuIsActive = false;
var nMouseOutTimerID;

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


if (MCONST_EscapeKill) {
	if (browser.isIE)
		document.onkeypress = onPageKeyPress;
}

// Capture mouse clicks on the page so any active button can be deactivated.
if (MCONST_ClickKill) {
	if (browser.isIE)
	  document.onmousedown = onPageMouseDown;
	else
	  document.addEventListener("mousedown", onPageMouseDown, true);
}

function onPageKeyPress() {
	var evnt = window.event;
	if (evnt.keyCode == 27) closeOnEvent(evnt);
}


function onButtonKeypress() {
	
	if (browser.isIE) {
		var evnt = window.event;
		var el;
		
		if (evnt.keyCode == 27) {
			
			closeOnEvent(evnt);
			
			if (browser.isIE)
				el = window.event.srcElement;
			else
				el = (event.target.tagName ? event.target : event.target.parentNode);
			
			el.blur();
			
			  if (getContainerWith(el, "DIV", "menu") == null) {
				resetButton(activeButton);
				activeButton = null;
			  }
			
		}
	} 
}


function onPageMouseDown(event) {
	closeOnEvent(event)
}
	
function closeOnEvent(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 true;

  // 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;
  }
  
  clearMouseOutTimer();
  onMenusDeactivated();

}


function buttonClick(event, menuId) {

	var button;
	
	if (bAllowableBrowser()) {
	
		// 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 (menuId) {
			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 (MCONST_MouseOutKill) {
		  if (button.onmouseout == null) {
		  	button.onblur = buttonOrMenuMouseout;
			button.onmouseout = buttonOrMenuMouseout;
		  }
		
			// Exit if this button is the currently active one.
			if (button == activeButton)
				return false;
		}
		
		if (MCONST_EscapeKill && browser.isIE) {
			if (button.onkeypress == null) {
				button.onkeypress = onButtonKeypress;
			}
		}
		
		// 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;
	
	if (bAllowableBrowser()) {
	
		bMenuIsActive = true;
		onMenusActivated();
		
		clearMouseOutTimer();
		
		// 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";
	
	// Added for activate/deactivate on mouseover.
	if (MCONST_MouseOutKill) {
		// Set mouseout event handler for the button, if not already done.
		if (button.onmouseout == null)
			button.onmouseout = buttonOrMenuMouseout;
		if (button.menu)
			if (button.menu.onmouseout == null)
				button.menu.onmouseout = buttonOrMenuMouseout;
	}
	
	// Position the associated drop down menu next to the button and show it.
	x = getPageOffsetLeft(button);
	if (MCONST_TopMenuFoldRight) 
		x += button.offsetWidth;
		
	y = getPageOffsetTop(button); 
	if (!MCONST_TopMenuFoldRight)
		y += button.offsetHeight;
	
	// For IE, adjust position.
	if (browser.isIE) {
		x += button.offsetParent.clientLeft;
		y += button.offsetParent.clientTop;
	}
	
	if (button.menu) {
		button.menu.style.left = x + "px";
		button.menu.style.top  = y + "px";
		button.menu.style.visibility = "visible";
		if (MCONST_ScrollOpen && browser.isIE) {
			button.menu.style.clip = "rect(0px 0px 0px 0px)";
			slideMenu(button.menu.id, "OPEN", nGetMenuItemHeight(button.menu.id), y);
		}

	}
}

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";
	}
}

function startMouseOutTimer() {
	clearMouseOutTimer();
	nMouseOutTimerID = window.setTimeout('resetActiveButton()', MCONST_TimerOutPause);
}

function clearMouseOutTimer() {
	window.clearTimeout(nMouseOutTimerID);
}


function resetActiveButton() {
	clearMouseOutTimer();
	resetButton(activeButton);
	activeButton = null;
	bMenuIsActive = false;
	onMenusDeactivated();
}


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

function menuMouseover(event) {

	var menu;
	
	clearMouseOutTimer();
	
	// 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;
	
	clearMouseOutTimer();
	
	// 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 && menu.activeItem != item)
		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 (MCONST_MouseOutKill) {
		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 + MCONST_MenuXOffset + "px";
	item.subMenu.style.top  = y + "px";
	if (item.subMenu.style.visibility != "visible") {
		item.subMenu.style.visibility = "visible";
		if (MCONST_ScrollOpen && browser.isIE) {
			item.subMenu.style.clip = "rect(0px 0px 0px 0px)";
			slideMenu(item.subMenu.id, "OPEN", nGetMenuItemHeight(item.subMenu.id), y);
		}

	}
	
	// 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);
		// slideMenu(menu.activeItem, "CLOSE", nGetMenuItemHeight(menu.activeItem));
		menu.activeItem.subMenu.style.visibility = "hidden";
		menu.activeItem.subMenu = null;
	}
	
	removeClassName(menu.activeItem, "menuItemHighlight");
	menu.activeItem = null;

}

// scroll menu open
function slideMenu(sCurrOpeningMenuID, sDirection, nMenuItemHeight, nFinalYPos) {
	var bContinueSlide = false;
	var objActiveMenu = document.getElementById(sCurrOpeningMenuID);
	var nTotalWidth = objActiveMenu.offsetWidth;
	var nTotalHeight = objActiveMenu.offsetHeight;
	var sCurrRect = objActiveMenu.style.clip;
	var nCurrHeight = parseFloat(sCurrRect.split(' ')[2]); // pull out the current clip rect height
	
	if (nMenuItemHeight == null || nMenuItemHeight == 0)
		return;
	
	if (sDirection == "OPEN") {
		nCurrHeight += nMenuItemHeight;
		if (nCurrHeight < nTotalHeight) bContinueSlide = true;
	} else {
		nCurrHeight -= nMenuItemHeight;
		if (nCurrHeight > 0) bContinueSlide = true;
	}
	
	if (nCurrHeight <= 0) 
		objActiveMenu.style.visibility = "hidden";
	else {
		objActiveMenu.style.clip = "rect(0px " + nTotalWidth + "px " + nCurrHeight + "px 0px)";
	}
	
	if (bContinueSlide) window.setTimeout("slideMenu('" + sCurrOpeningMenuID + "', '" + sDirection + "', " + nMenuItemHeight + ", " + nFinalYPos + ")", MCONST_SlideSpeed);
	
}

// get height of first menu item
var nMenuItemHeight = 0;
function nGetMenuItemHeight(sMenuID) {
	if (nMenuItemHeight > 0) 
		return nMenuItemHeight;
	
	// get the list of child <A> items
	var objMenu = document.getElementById(sMenuID);
	var itemList = objMenu.getElementsByTagName("A");
	if (itemList.length > 0)
		nMenuItemHeight = itemList[0].offsetHeight;
	
	return nMenuItemHeight;
}




// Added for activate/deactivate on mouseover. Handler for mouseout event on buttons and menus.
function buttonOrMenuMouseout(event) {

	var el;
	
	// If there is no active button, exit.
	if (activeButton == null)
		return false;
	
	// 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) {
		startMouseOutTimer();
	}
}

function onMenuBarMouseout(event) {

}


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

function menuInit(menu) {

	var itemList, spanList;
	var textEl, arrowEl;
	var itemWidth;
	var w, dw;
	var i, j;
	var nPadding = 0;
	
	// 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].style.fontSize = "8px";
				spanList[i].style.lineHeight = "8px";
				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) {
			nPadding = (itemWidth - (textEl.offsetWidth + arrowEl.offsetWidth));
			// set padding to 0 if -ve
			nPadding = (nPadding < 0) ? 0 : nPadding;
			textEl.style.paddingRight = nPadding + "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";
	}
	
	// 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;
}