var delay = 1000;
var seltab = null;
var prevtab = null;
function tabs_init(id)
{
	seltab = document.getElementById(id);
	showTab(seltab, false);
}
function hideMenu(menu)
{
	if (menu != null)
		menu.style.display = 'none';
}
function showMenu(menu, tab)
{
	if (menu != null)
	{
		
		menu.style.display = 'inline';
		
		if (!menu.style.marginLeft)
		{
			var TextIndent = 0;
			var TabTable = document.getElementById("TabTable");
			var TotalWidth = TabTable.offsetWidth;
			var TabLeft = findPosX(tab)-findPosX(TabTable);
			var TabCenter = TabLeft+(tab.offsetWidth/2);
			var TextWidth = menu.offsetWidth;
			var TextCenter = TextWidth/2;
			
			if (TextCenter > (TotalWidth - TabCenter)) 
				TextIndent = (TotalWidth-TextWidth-20); //Right justify
			else if (TextCenter < TabCenter)
				TextIndent= (TabCenter - TextCenter-5);	//center
		
			menu.style.marginLeft = TextIndent;	
		}
	}
}
function findPosX(obj)
{
	var curleft = 0;
	if (obj.offsetParent)
	{
		while (obj.offsetParent)
		{
			curleft += obj.offsetLeft
			obj = obj.offsetParent;
		}
	}
	else if (obj.x)
		curleft += obj.x;
	return curleft;
}


function tab_onMouseOver(tab)
{
	showTab(tab, true);
}
function tab_onMouseOut(tab)
{
	hideTab(tab);
}
function showTab(tab, displayMenu)
{
	if (tab != null)
	{
		if (typeof(tab) == 'string')
			tab = document.getElementById(tab);

		tab.state = 'A';
		tab.className = (tab == seltab) ? 'seltab' : 'hovtab';
		
		if (prevtab != tab)
			doHideTab(prevtab);
			
		if (displayMenu)
		{
			var menu = document.getElementById(tab.id + 'Menu');	
			showMenu(menu, tab);			
		}
		prevtab = tab;
	}
}
function hideTab(tab)
{
	if (tab != null)
	{
		if (typeof(tab) == 'string')
			tab = document.getElementById(tab);
			
		if (tab.state == 'A')
		{
			tab.state = 'H';
			setTimeout(function() {
				if (tab.state == 'H')
				{
					doHideTab(tab);
					prevtab = null;
				}
			}, delay);
		}
	}
}
function doHideTab(tab)
{
	if (tab != null)
	{
		tab.state = null;
		tab.className = (tab == seltab) ? 'seltab' : 'tab';
		var menu = document.getElementById(tab.id + 'Menu');
		hideMenu(menu);
	}
}


/* Begin core menu scripts */
window.onload = SetHover__ANM;

var hoverClass = "ANM-Hover";
var topmostClass = "ANM";

function SetHover__ANM(){
    var menus = document.getElementsByTagName("ul");
    for (var i=0; i<menus.length; i++){
        if(menus[i].className == topmostClass){
            var items = menus[i].getElementsByTagName("li");
            for (var k = 0; k < items.length; k++){
                items[k].onmouseover = function() { Hover__ANM(this); }
                items[k].onmouseout = function() { Unhover__ANM(this); }
            }
        }
    }
}

function Hover__ANM(element){
    AddClass(element, hoverClass);
}

function Unhover__ANM(element){
    RemoveClass(element, hoverClass);
}

function CanHaveClass(element){
    return ((element != null) && (element.className != null));
}

function HasAnyClass(element){
    return (CanHaveClass(element) && (element.className.length > 0));
}

function HasClass(element, specificClass){
    return (HasAnyClass(element) && (element.className.indexOf(specificClass) > -1));
}

function AddClass(element, classToAdd){
    if (HasAnyClass(element))    {
        if (!HasClass(element, classToAdd))        {
            element.className = element.className + " " + classToAdd;
        }
    }
    else if (CanHaveClass(element))    {
        element.className = classToAdd;
    }
}

function AddClassUpward(startElement, stopParentClass, classToAdd){
    var elementOrParent = startElement;
    while ((elementOrParent != null) && (!HasClass(elementOrParent, topmostClass))){
        AddClass(elementOrParent, classToAdd);
        elementOrParent = elementOrParent.parentNode;
    }    
}

function SwapClass(element, oldClass, newClass){
    if (HasAnyClass(element)){
        element.className = element.className.replace(new RegExp(oldClass, "gi"), newClass);
    }
}

function SwapOrAddClass(element, oldClass, newClass){
    if (HasClass(element, oldClass)){
        SwapOrAddClass(element, oldClass, newClass);
    }
    else{
        AddClass(element, newClass);
    }
}

function RemoveClass(element, classToRemove){
    SwapClass(element, classToRemove, "");
}

function RemoveClassUpward(startElement, stopParentClass, classToRemove){
    var elementOrParent = startElement;
    while ((elementOrParent != null) && (!HasClass(elementOrParent, topmostClass))){
        RemoveClass(elementOrParent, classToRemove);
        elementOrParent = elementOrParent.parentNode;
    }    
}