/* 
Simple JQuery menu.
HTML structure to use:

Notes: 

1: each menu MUST have an ID set. It doesn't matter what this ID is as long as it's there.
2: each menu MUST have a class 'menu' set. If the menu doesn't have this, the JS won't make it dynamic

Optional extra classnames:

noaccordion : no accordion functionality
collapsible : menu works like an accordion but can be fully collapsed
expandfirst : first menu item expanded at page load

<ul id="menu1" class="menu [optional class] [optional class]">
	<li><a href="#">Sub menu heading</a>
		<ul>
			<li><a href="http://site.com/">Link</a></li>
			<li><a href="http://site.com/">Link</a></li>
			<li><a href="http://site.com/">Link</a></li>
			...
			...
		</ul>
	<li><a href="#">Sub menu heading</a>
		<ul>
			<li><a href="http://site.com/">Link</a></li>
			<li><a href="http://site.com/">Link</a></li>
			<li><a href="http://site.com/">Link</a></li>
			...
			...
		</ul>
	...
	...
</ul>

Copyright 2008 by Marco van Hylckama Vlieg

web: http://www.i-marco.nl/weblog/
email: marco@i-marco.nl

Free for non-commercial use
*/

function openMenu(menuNode) {
	if (menuNode != null) {
		var menuElement = $('#' + menuNode.id);
		if ((menuElement != null) && (! menuElement.is(':visible'))) {
			openMenu(menuNode.parentNode.parentNode);
			menuElement.show();
		}
	}
}

function initMenus() {
	$('ul.menu ul').hide();
	$.each($('ul.menu'), function(){
		$('#' + this.id + '.expandfirst ul:first').show();
	});
	$('ul.menu li a').click(
		function() {
			var checkElement = $(this).next();
			var parent = this.parentNode.parentNode.id;

			if($('#' + parent).hasClass('noaccordion')) {
				$(this).next().slideToggle('normal');
				return false;
			}
			if((checkElement.is('ul')) && (checkElement.is(':visible'))) {
				if($('#' + parent).hasClass('collapsible')) {
					$('#' + parent + ' ul:visible').slideUp('normal');
				}
				return false;
			}
			if((checkElement.is('ul')) && (!checkElement.is(':visible'))) {
				$('#' + parent + ' ul:visible').slideUp('normal');
				checkElement.slideDown('normal');
				createCookie('menuOpen', checkElement.attr('id'), 100000);
				return true;
			}
		}
	);
}

$(document).ready(function() {
	initMenus();
	var menuCookie = readCookie('menuOpen');
	if (menuCookie != null) {
		var menuNode = document.getElementById(menuCookie);
		openMenu(menuNode);
	}
});