A accordion jQuery plugin - Originally created by the good people over at PSD2HTML.com - Simply here so we can pull the code in remotely

jquery-open-close-plugin.js

/*
 * jQuery Open/Close plugin
 */
;(function($) {
	function OpenClose(options) {
		this.options = $.extend({
			addClassBeforeAnimation: true,
			hideOnClickOutside: false,
			activeClass: 'active',
			opener: '.opener',
			slider: '.slide',
			animSpeed: 400,
			effect: 'fade',
			event: 'click'
		}, options);
		this.init();
	}
	OpenClose.prototype = {
		init: function() {
			if (this.options.holder) {
				this.findElements();
				this.attachEvents();
				this.makeCallback('onInit', this);
			}
		},
		findElements: function() {
			this.holder = $(this.options.holder);
			this.opener = this.holder.find(this.options.opener);
			this.slider = this.holder.find(this.options.slider);
		},
		attachEvents: function() {
			// add handler
			var self = this;
			this.eventHandler = function(e) {
				e.preventDefault();
				if (self.slider.hasClass(slideHiddenClass)) {
					self.showSlide();
				} else {
					self.hideSlide();
				}
			};
			self.opener.on(self.options.event, this.eventHandler);

			// hover mode handler
			if (self.options.event === 'hover') {
				self.opener.on('mouseenter', function() {
					if (!self.holder.hasClass(self.options.activeClass)) {
						self.showSlide();
					}
				});
				self.holder.on('mouseleave', function() {
					self.hideSlide();
				});
			}

			// outside click handler
			self.outsideClickHandler = function(e) {
				if (self.options.hideOnClickOutside) {
					var target = $(e.target);
					if (!target.is(self.holder) && !target.closest(self.holder).length) {
						self.hideSlide();
					}
				}
			};

			// set initial styles
			if (this.holder.hasClass(this.options.activeClass)) {
				$(document).on('click touchstart', self.outsideClickHandler);
			} else {
				this.slider.addClass(slideHiddenClass);
			}
		},
		showSlide: function() {
			var self = this;
			if (self.options.addClassBeforeAnimation) {
				self.holder.addClass(self.options.activeClass);
			}
			self.slider.removeClass(slideHiddenClass);
			$(document).on('click touchstart', self.outsideClickHandler);

			self.makeCallback('animStart', true);
			toggleEffects[self.options.effect].show({
				box: self.slider,
				speed: self.options.animSpeed,
				complete: function() {
					if (!self.options.addClassBeforeAnimation) {
						self.holder.addClass(self.options.activeClass);
					}
					self.makeCallback('animEnd', true);
				}
			});
		},
		hideSlide: function() {
			var self = this;
			if (self.options.addClassBeforeAnimation) {
				self.holder.removeClass(self.options.activeClass);
			}
			$(document).off('click touchstart', self.outsideClickHandler);

			self.makeCallback('animStart', false);
			toggleEffects[self.options.effect].hide({
				box: self.slider,
				speed: self.options.animSpeed,
				complete: function() {
					if (!self.options.addClassBeforeAnimation) {
						self.holder.removeClass(self.options.activeClass);
					}
					self.slider.addClass(slideHiddenClass);
					self.makeCallback('animEnd', false);
				}
			});
		},
		destroy: function() {
			this.slider.removeClass(slideHiddenClass).css({
				display: ''
			});
			this.opener.off(this.options.event, this.eventHandler);
			this.holder.removeClass(this.options.activeClass).removeData('OpenClose');
			$(document).off('click touchstart', this.outsideClickHandler);
		},
		makeCallback: function(name) {
			if (typeof this.options[name] === 'function') {
				var args = Array.prototype.slice.call(arguments);
				args.shift();
				this.options[name].apply(this, args);
			}
		}
	};

	// add stylesheet for slide on DOMReady
	var slideHiddenClass = 'js-slide-hidden';
	(function() {
		var tabStyleSheet = $('<style type="text/css">')[0];
		var tabStyleRule = '.' + slideHiddenClass;
		tabStyleRule += '{position:absolute !important;left:-9999px !important;top:-9999px !important;display:block !important}';
		if (tabStyleSheet.styleSheet) {
			tabStyleSheet.styleSheet.cssText = tabStyleRule;
		} else {
			tabStyleSheet.appendChild(document.createTextNode(tabStyleRule));
		}
		$('head').append(tabStyleSheet);
	}());

	// animation effects
	var toggleEffects = {
		slide: {
			show: function(o) {
				o.box.stop(true).hide().slideDown(o.speed, o.complete);
			},
			hide: function(o) {
				o.box.stop(true).slideUp(o.speed, o.complete);
			}
		},
		fade: {
			show: function(o) {
				o.box.stop(true).hide().fadeIn(o.speed, o.complete);
			},
			hide: function(o) {
				o.box.stop(true).fadeOut(o.speed, o.complete);
			}
		},
		none: {
			show: function(o) {
				o.box.hide().show(0, o.complete);
			},
			hide: function(o) {
				o.box.hide(0, o.complete);
			}
		}
	};

	// jQuery plugin interface
	$.fn.openClose = function(opt) {
		var args = Array.prototype.slice.call(arguments);
		var method = args[0];

		return this.each(function() {
			var $holder = jQuery(this);
			var instance = $holder.data('OpenClose');

			if (typeof opt === 'object' || typeof opt === 'undefined') {
				$holder.data('OpenClose', new OpenClose($.extend({
					holder: this
				}, opt)));
			} else if (typeof method === 'string' && instance) {
				if (typeof instance[method] === 'function') {
					args.shift();
					instance[method].apply(instance, args);
				}
			}
		});
	};
}(jQuery));