/* 
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(id) {
	id = (id == null) ? '' : '#'+id+' ';
	$(id+'ul.menu ul').initPrettyCheckboxes();
	$(id+'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').slideClose('normal');
					$(this).removeClass('selected');
				}
				return false;
			}
			if((checkElement.is('ul')) && (!checkElement.is(':visible'))) {
				$('ul.menu ul:visible').slideClose('normal');
				checkElement.slideOpen('normal');
				$('ul.menu li a').removeClass('selected');
				$(this).addClass('selected');
				return false;
			}
		}
	);
}


jQuery.fn.initPrettyCheckboxes = function() {
	this.each(function() {
		var allItems = $('#' + this.id + ' li').size();
		var allCheckedItems = $('#' + this.id + ' li input:checked').size();
		var label = $('#' + this.id).siblings('label');
		if (allCheckedItems > 0) {
			if (allCheckedItems == allItems) {
				label.addClass('checked');
				$('input#' + label.attr('for')).attr('checked', 'checked');
			} else {
				label.addClass('semichecked');
			}
		}
	});
	$(this).slideUp(0);
}

jQuery.fn.slideClose = function(speed) {
	this.each(function() {
		var allItems = $('#' + this.id + ' li').size();
		var allCheckedItems = $('#' + this.id + ' li input:checked').size();
		var label = $('#' + this.id).siblings('label');
		
		label.removeClass('semichecked');
		if (allCheckedItems == 0) {
			if (label.hasClass('checked')) {
				label.removeClass('checked');
				$('input#' + label.attr('for')).attr('checked', '');
			}
		} else {
			if (allCheckedItems == allItems) {
				if (!label.hasClass('checked')) {
					label.addClass('checked');
					$('input#' + label.attr('for')).attr('checked', 'checked');
				}
			} else {
				if (label.hasClass('checked')) {
					label.removeClass('checked');
					$('input#' + label.attr('for')).attr('checked', '');
				}
				label.addClass('semichecked');
			}
		}
	});
	$(this).slideUp(speed);
}

jQuery.fn.slideOpen = function(speed) {
	$(this).slideDown(speed);
}

$(document).ready(function() {initMenus();});