/*
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 initMenus() {

	sessvars = sessvars || {};


	$('ul.accordian-menu ul').hide();
	$.each($('ul.accordian-menu'), function(){
		$('#' + this.id + '.expandfirst ul:first').show();
	});

	if (sessvars.accordian){
		var expanded = sessvars.accordian.expanded;
		if (expanded){
			$('#'+expanded).next().show();
		}
	}

	$('ul.accordian-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'))) {

			 	sessvars.accordian = {
			 		expanded:this.id
			 	};

				$('#' + parent + ' ul:visible').slideUp('normal');
				checkElement.slideDown('normal');

				$.each($('#' + parent + ' li'), function(){
					$(this).removeClass('parent');
					$(this).removeClass('current');
				});


				$(this).parent().addClass('parent');

				return false;
			}

			if ($(this).parent().hasClass('no-children'))
				sessvars.accordian = null;
		}
	);
}
$(document).ready(function() {initMenus();});