/**
Script: Slideshow.js
	Slideshow - A javascript class for Mootools to stream and animate the presentation of images on your website.

License:
	MIT-style license.

Copyright:
	Copyright (c) 2008 [Aeron Glemann](http://www.electricprism.com/aeron/).

Portions Copyright:
  Copyright (c) 2010 by ai-Design, LLC. All rights reserved.
  [Robert C. Kobus] < http://www.ai-design.com >

Dependencies:
	Mootools 1.2 Core: Fx.Morph, Fx.Tween, Selectors, Element.Dimensions.
	Mootools 1.2 More: Assets.

                      * * * * * * * * *

 Permission is hereby granted, free of charge, to any person
 obtaining a copy of this software and associated documentation
 files (the "Software"), to deal in the Software without
 restriction, including without limitation the rights to use,
 copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the
 Software is furnished to do so, subject to the following
 conditions:

 The above copyright notice and this permission notice shall be
 included in all copies or substantial portions of the Software.
 Except as contained in this notice, the names of ai-Design, LLC 
 and Robert C. Kobus shall not be used in advertising or otherwise 
 to promote the sale, use, modification or other dealings in this 
 Software without prior written authorization from ai-Design, LLC 
 and Robert C. Kobus.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 OTHER DEALINGS IN THE SOFTWARE.
*/

Slideshow = new Class({
	Implements: [Chain, Events, Options],
	
	options: {/*
		onComplete: $empty,
		onEnd: $empty,
		onStart: $empty,*/
		captions: false,
		center: true,
		classes: [],
		controller: false,
		delay: 2000,
		duration: 750,
		fast: false,
		height: false,
		href: '',
		hu: '',
		linked: false,
		loader: {'animate': ['css/loader-#.png', 12]},
		loop: true,
		match: /\?slide=(\d+)$/,
		overlap: true,
		paused: false,
		properties: ['href', 'rel', 'rev', 'title'],
		random: false,
		replace: [/(\.[^\.]+)$/, 't$1'],
		resize: 'width',
		slide: 0,
		thumbnails: false,
		titles: true,
		transition: function(p){return -(Math.cos(Math.PI * p) - 1) / 2;},
		width: false
	},
	
/**
Constructor: initialize
	Creates an instance of the Slideshow class.
	
Arguments:
	element - (element) The wrapper element.
	data - (array or object) The images and optional thumbnails, captions and links for the show.
	options - (object) The options below.
	
Syntax:
	var myShow = new Slideshow(element, data, options);
*/

	initialize: function(el, data, options){	
		this.setOptions(options);
		this.slideshow = $(el);
		if (!this.slideshow) 
			return;
		this.slideshow.set('styles', {'display': 'block', 'position': 'relative', 'z-index': 0});
		var match = window.location.href.match(this.options.match);
		this.slide = (this.options.match && match) ? match[1].toInt() : this.options.slide;
		this.counter = this.delay = this.transition = 0;
		this.direction = 'left';
		this.paused = false;
		if (!this.options.overlap)
			this.options.duration *= 2;
		var anchor = this.slideshow.getElement('a') || new Element('a');
		if (!this.options.href)
			this.options.href = anchor.get('href') || '';
		if (this.options.hu.length && !this.options.hu.test(/\/$/)) 
			this.options.hu += '/';
		if (this.options.fast === true)
			this.options.fast = 2;
			
		// styles
		
		var keys = ['slideshow', 'first', 'prev', 'play', 'pause', 'next', 'last', 'images', 'captions', 'controller', 'thumbnails', 'hidden', 'visible', 'inactive', 'active', 'loader'];
		var values = keys.map(function(key, i){
			return this.options.classes[i] || key;
		}, this);
		this.classes = values.associate(keys);
		this.classes.get = function(){
			var str = '.' + this.slideshow;
			for (var i = 0, l = arguments.length; i < l; i++)
				str += ('-' + this[arguments[i]]);
			return str;
		}.bind(this.classes);
			
		// data	
			
		if (!data){
			this.options.hu = '';
			data = {};
			var thumbnails = this.slideshow.getElements(this.classes.get('thumbnails') + ' img');
			this.slideshow.getElements(this.classes.get('images') + ' img').each(function(img, i){
				var src = img.get('src');
				var caption = $pick(img.get('alt'), img.get('title'), '');
				var parent = img.getParent();
				var properties = (parent.get('tag') == 'a') ? parent.getProperties : {};
				var href = img.getParent().get('href') || '';
				var thumbnail = (thumbnails[i]) ? thumbnails[i].get('src') : '';
				data[src] = {'caption': caption, 'href': href, 'thumbnail': thumbnail};
			});
		}
		var loaded = this.load(data);
		if (!loaded)
			return; 
		
		// events
		
		this.events = $H({'keydown': [], 'keyup': [], 'mousemove': []});
		var keyup = function(e){
			switch(e.key){
				case 'left': 
					this.prev(e.shift); break;
				case 'right': 
					this.next(e.shift); break;
				case 'p': 
					this.pause(); break;
			}
		}.bind(this);		
		this.events.keyup.push(keyup);
		document.addEvent('keyup', keyup);

		// required elements
			
		var el = this.slideshow.getElement(this.classes.get('images'));
		var images = (el) ? el.empty() : new Element('div', {'class': this.classes.get('images').substr(1)}).inject(this.slideshow);
		var div = images.getSize();
		this.height = this.options.height || div.y;		
		this.width = this.options.width || div.x;
		images.set({'styles': {'display': 'block', 'height': this.height, 'overflow': 'hidden', 'position': 'relative', 'width': this.width}});
		this.slideshow.store('images', images);
		this.a = this.image = this.slideshow.getElement('img') || new Element('img');
		if (Browser.Engine.trident && Browser.Engine.version > 4)
			this.a.style.msInterpolationMode = 'bicubic';
		this.a.set('styles', {'display': 'none', 'position': 'absolute', 'zIndex': 1});
		this.b = this.a.clone();
		[this.a, this.b].each(function(img){
			anchor.clone().cloneEvents(anchor).grab(img).inject(images);
		});
		
		// optional elements
		
		if (this.options.captions)
 			this._captions();
		if (this.options.controller)
			this._controller();
		if (this.options.loader)
 			this._loader();
		if (this.options.thumbnails)
			this._thumbnails();
			
		// begin show
		
		this._preload();
	},
	
/**
Public method: go
	Jump directly to a slide in the show.

Arguments:
	n - (integer) The index number of the image to jump to, 0 being the first image in the show.
	
Syntax:
	myShow.go(n);	
*/

	go: function(n, direction){
		if ((this.slide - 1 + this.data.images.length) % this.data.images.length == n || $time() < this.transition)
			return;		
		$clear(this.timer);
		this.delay = 0;		
		this.direction = (direction) ? direction : ((n < this.slide) ? 'right' : 'left');
		this.slide = n;
		if (this.preloader) 
			this.preloader = this.preloader.destroy();
		this._preload(this.options.fast == 2 || (this.options.fast == 1 && this.paused));
	},

/**
Public method: first
	Goes to the first image in the show.

Syntax:
	myShow.first();	
*/

	first: function(){
		this.prev(true); 
	},

/**
Public method: prev
	Goes to the previous image in the show.

Syntax:
	myShow.prev();	
*/

	prev: function(first){
		var n = 0;
		if (!first){
			if (this.options.random){
				
				// if it's a random show get the previous slide from the showed array

				if (this.showed.i < 2)
					return;
				this.showed.i -= 2;
				n = this.showed.array[this.showed.i];
			}
			else
				n = (this.slide - 2 + this.data.images.length) % this.data.images.length;									
		}
		this.pause(1);
		this.go(n, 'right');
		this.pause(0);
	},

/**
Public method: pause
	Toggles play / pause state of the show.

Arguments:
	p - (undefined, 1 or 0) Call pause with no arguments to toggle the pause state. Call pause(1) to force pause, or pause(0) to force play.

Syntax:
	myShow.pause(p);	
*/

	pause: function(p){
		if ($chk(p))
			this.paused = (p) ? false : true;
		if (this.paused){
			this.paused = false;
			this.delay = this.transition = 0;		
			this.timer = this._preload.delay(100, this);
			[this.a, this.b].each(function(img){
				['morph', 'tween'].each(function(p){
					if (this.retrieve(p)) this.get(p).resume();
				}, img);
			});
			if (this.options.controller)
				this.slideshow.getElement('.' + this.classes.pause).removeClass(this.classes.play);
		} 
		else {
			this.paused = true;
			this.delay = Number.MAX_VALUE;
			this.transition = 0;
			$clear(this.timer);
			[this.a, this.b].each(function(img){
				['morph', 'tween'].each(function(p){
					if (this.retrieve(p)) this.get(p).pause();
				}, img);
			});
			if (this.options.controller)
				this.slideshow.getElement('.' + this.classes.pause).addClass(this.classes.play);
		}
	},
	
/**
Public method: next
	Goes to the next image in the show.

Syntax:
	myShow.next();	
*/

	next: function(last){
		var n = (last) ? this.data.images.length - 1 : this.slide;
		this.pause(1);
		this.go(n, 'left');
		this.pause(0);
	},

/**
Public method: last
	Goes to the last image in the show.

Syntax:
	myShow.last();	
*/

	last: function(){
		this.next(true); 
	},

/**
Public method: load
	Loads a new data set into the show: will stop the current show, rewind and rebuild thumbnails if applicable.

Arguments:
	data - (array or object) The images and optional thumbnails, captions and links for the show.

Syntax:
	myShow.load(data);
*/

	load: function(data){
		this.firstrun = true;
		this.showed = {'array': [], 'i': 0};
		if ($type(data) == 'array'){
			this.options.captions = false;			
			data = new Array(data.length).associate(data.map(function(image, i){ return image + '?' + i })); 
		}
		this.data = {'images': [], 'captions': [], 'hrefs': [], 'thumbnails': []};
		for (var image in data){
			var obj = data[image] || {};
			var caption = (obj.caption) ? obj.caption.trim() : '';
			var href = (obj.href) ? obj.href.trim() : ((this.options.linked) ? this.options.hu + image : this.options.href);
			var thumbnail = (obj.thumbnail) ? obj.thumbnail.trim() : image.replace(this.options.replace[0], this.options.replace[1]);
			this.data.images.push(image);
			this.data.captions.push(caption);
			this.data.hrefs.push(href);
			this.data.thumbnails.push(thumbnail);
		}
		if (this.options.random)
			this.slide = $random(0, this.data.images.length - 1);
		
		// only run when data is loaded dynamically into an existing slideshow instance
		
		if (this.options.thumbnails && this.slideshow.retrieve('thumbnails'))
			this._thumbnails();
		if (this.slideshow.retrieve('images')){
			[this.a, this.b].each(function(img){
				['morph', 'tween'].each(function(p){
					if (this.retrieve(p)) this.get(p).cancel();
				}, img);
			});
			this.slide = this.transition = 0;
			this.go(0);		
		}
		return this.data.images.length;
	},
	
/**
Public method: destroy
	Destroys a Slideshow instance.

Arguments:
	p - (string) The images and optional thumbnails, captions and links for the show.

Syntax:
	myShow.destroy(p);
*/

	destroy: function(p){
		this.events.each(function(array, e){
			array.each(function(fn){ document.removeEvent(e, fn); });
		});
		this.pause(1);
		if (this.options.loader)
			$clear(this.slideshow.retrieve('loader').retrieve('timer'));		
		if (this.options.thumbnails)
			$clear(this.slideshow.retrieve('thumbnails').retrieve('timer'));
		this.slideshow.uid = Native.UID++;
		if (p)
			this.slideshow[p]();
	},
	
/**
Private method: preload
	Preloads the next slide in the show, once loaded triggers the show, updates captions, thumbnails, etc.
*/

	_preload: function(fast){
		if (!this.preloader)
		 	this.preloader = new Asset.image(this.options.hu + this.data.images[this.slide], {'onload': function(){
				this.store('loaded', true);
			}});	
		if (this.preloader.retrieve('loaded') && $time() > this.delay && $time() > this.transition){
			if (this.stopped){
				if (this.options.captions)
					this.slideshow.retrieve('captions').get('morph').cancel().start(this.classes.get('captions', 'hidden'));
				this.pause(1);
				if (this.end)
					this.fireEvent('end');
				this.stopped = this.end = false;
				return;				
			}					
			this.image = (this.counter % 2) ? this.b : this.a;
			this.image.set('styles', {'display': 'block', 'height': 'auto', 'visibility': 'hidden', 'width': 'auto', 'zIndex': this.counter});
			['src', 'height', 'width'].each(function(prop){
				this.image.set(prop, this.preloader.get(prop));
			}, this);
			this._resize(this.image);
			this._center(this.image);
			var anchor = this.image.getParent();
			if (this.data.hrefs[this.slide])
				anchor.set('href', this.data.hrefs[this.slide]);			
			else
				anchor.erase('href');
			var text = (this.data.captions[this.slide])
				? this.data.captions[this.slide].replace(/<.+?>/gm, '').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, "'") 
				: '';
			this.image.set('alt', text);		
			if (this.options.titles)
				anchor.set('title', text);
			if (this.options.loader)
				this.slideshow.retrieve('loader').fireEvent('hide');
			if (this.options.captions)
				this.slideshow.retrieve('captions').fireEvent('update', fast);				
			if (this.options.thumbnails)
				this.slideshow.retrieve('thumbnails').fireEvent('update', fast); 			
			this._show(fast);
			this._loaded();
		} 
		else {
			if ($time() > this.delay && this.options.loader)
				this.slideshow.retrieve('loader').fireEvent('show');
			this.timer = (this.paused && this.preloader.retrieve('loaded')) ? null : this._preload.delay(100, this, fast); 
		}
	},

/**
Private method: show
	Does the slideshow effect.
*/

	_show: function(fast){
		if (!this.image.retrieve('morph')){
			var options = (this.options.overlap) ? {'duration': this.options.duration, 'link': 'cancel'} : {'duration': this.options.duration / 2, 'link': 'chain'};
			$$(this.a, this.b).set('morph', $merge(options, {'onStart': this._start.bind(this), 'onComplete': this._complete.bind(this), 'transition': this.options.transition}));
		}
		var hidden = this.classes.get('images', ((this.direction == 'left') ? 'next' : 'prev'));
		var visible = this.classes.get('images', 'visible');
		var img = (this.counter % 2) ? this.a : this.b;
		if (fast){			
			img.get('morph').cancel().set(hidden);
			this.image.get('morph').cancel().set(visible); 			
		} 
		else {
			if (this.options.overlap){
				img.get('morph').set(visible);
				this.image.get('morph').set(hidden).start(visible);
			} 
			else	{
				var fn = function(hidden, visible){
					this.image.get('morph').set(hidden).start(visible);
				}.pass([hidden, visible], this);
				hidden = this.classes.get('images', ((this.direction == 'left') ? 'prev' : 'next'));
				img.get('morph').set(visible).start(hidden).chain(fn);
			}
		}
	},
	
/**
Private method: loaded
	Run after the current image has been loaded, sets up the next image to be shown.
*/

	_loaded: function(){
		this.counter++;
		this.delay = (this.paused) ? Number.MAX_VALUE : $time() + this.options.duration + this.options.delay;
		this.direction = 'left';
		this.transition = (this.options.fast == 2 || (this.options.fast == 1 && this.paused)) ? 0 : $time() + this.options.duration;			
		if (this.slide + 1 == this.data.images.length && !this.options.loop && !this.options.random)
			this.stopped = this.end = true;			
		if (this.options.random){
			this.showed.i++;
			if (this.showed.i >= this.showed.array.length){
				var n = this.slide;
				if (this.showed.array.getLast() != n) this.showed.array.push(n);
				while (this.slide == n)
					this.slide = $random(0, this.data.images.length - 1);				
			}
			else
				this.slide = this.showed.array[this.showed.i];
		}
		else
			this.slide = (this.slide + 1) % this.data.images.length;
		if (this.image.getStyle('visibility') != 'visible')
			(function(){ this.image.setStyle('visibility', 'visible'); }).delay(1, this);			
		if (this.preloader) 
			this.preloader = this.preloader.destroy();
		this._preload();
	},

/**
Private method: center
	Center an image.
*/

	_center: function(img){
		if (this.options.center){
			var size = img.getSize();
			img.set('styles', {'left': (size.x - this.width) / -2, 'top': (size.y - this.height) / -2});
		}
	},

/**
Private method: resize
	Resizes an image.
*/

	_resize: function(img){
		if (this.options.resize){
			var h = this.preloader.get('height'), w = this.preloader.get('width');
			var dh = this.height / h, dw = this.width / w, d;
			if (this.options.resize == 'length')
				d = (dh > dw) ? dw : dh;
			else
				d = (dh > dw) ? dh : dw;
			img.set('styles', {height: Math.ceil(h * d), width: Math.ceil(w * d)});
		}	
	},

/**
Private method: start
	Callback on start of slide change.
*/

	_start: function(){		
		this.fireEvent('start');
	},

/**
Private method: complete
	Callback on start of slide change.
*/

	_complete: function(){
		if (this.firstrun && this.options.paused){
			this.firstrun = false;
			this.pause(1);
		}
		this.fireEvent('complete');
	},

/**
Private method: captions
	Builds the optional caption element, adds interactivity.
	This method can safely be removed if the captions option is not enabled.
*/

	_captions: function(){
 		if (this.options.captions === true) 
 			this.options.captions = {};
		var el = this.slideshow.getElement(this.classes.get('captions'));
		var captions = (el) ? el.empty() : new Element('div', {'class': this.classes.get('captions').substr(1)}).inject(this.slideshow);
		captions.set({
			'events': {
				'update': function(fast){	
					var captions = this.slideshow.retrieve('captions');
					var empty = (this.data.captions[this.slide] === '');
					if (fast){
						var p = (empty) ? 'hidden' : 'visible';
						captions.set('html', this.data.captions[this.slide]).get('morph').cancel().set(this.classes.get('captions', p));
					}
					else {
						var fn = (empty) ? $empty : function(n){
							this.slideshow.retrieve('captions').set('html', this.data.captions[n]).morph(this.classes.get('captions', 'visible'))
						}.pass(this.slide, this);		
						captions.get('morph').cancel().start(this.classes.get('captions', 'hidden')).chain(fn);
					}
				}.bind(this)
			},
			'morph': $merge(this.options.captions, {'link': 'chain'})
		});
		this.slideshow.store('captions', captions);
	},

/**
Private method: controller
	Builds the optional controller element, adds interactivity.
	This method can safely be removed if the controller option is not enabled.
*/

	_controller: function(){
 		if (this.options.controller === true)
 			this.options.controller = {};
		var el = this.slideshow.getElement(this.classes.get('controller'));
		var controller = (el) ? el.empty() : new Element('div', {'class': this.classes.get('controller').substr(1)}).inject(this.slideshow);
		var ul = new Element('ul').inject(controller);
		$H({'first': 'Shift + Leftwards Arrow', 'prev': 'Leftwards Arrow', 'pause': 'P', 'next': 'Rightwards Arrow', 'last': 'Shift + Rightwards Arrow'}).each(function(accesskey, action){
			var li = new Element('li', {
				'class': (action == 'pause' && this.options.paused) ? this.classes.play + ' ' + this.classes[action] : this.classes[action]
			}).inject(ul);
			var a = this.slideshow.retrieve(action, new Element('a', {
				'title': ((action == 'pause') ? this.classes.play.capitalize() + ' / ' : '') + this.classes[action].capitalize() + ' [' + accesskey + ']'				
			}).inject(li));
			a.set('events', {
				'click': function(action){this[action]();}.pass(action, this),
				'mouseenter': function(active){this.addClass(active);}.pass(this.classes.active, a),
				'mouseleave': function(active){this.removeClass(active);}.pass(this.classes.active, a)
			});		
		}, this);
		controller.set({
			'events': {
				'hide': function(hidden){  
					if (!this.retrieve('hidden'))
						this.store('hidden', true).morph(hidden);
				}.pass(this.classes.get('controller', 'hidden'), controller),
				'show': function(visible){  
					if (this.retrieve('hidden'))
						this.store('hidden', false).morph(visible);
				}.pass(this.classes.get('controller', 'visible'), controller)
			},
			'morph': $merge(this.options.controller, {'link': 'cancel'})
		}).store('hidden', false);
		var keydown = function(e){
			if (['left', 'right', 'p'].contains(e.key)){
				var controller = this.slideshow.retrieve('controller');
				if (controller.retrieve('hidden'))
					controller.get('morph').set(this.classes.get('controller', 'visible')); 			
				switch(e.key){
					case 'left': 
						this.slideshow.retrieve((e.shift) ? 'first' : 'prev').fireEvent('mouseenter'); break;
					case 'right':
						this.slideshow.retrieve((e.shift) ? 'last' : 'next').fireEvent('mouseenter'); break;
					default:
						this.slideshow.retrieve('pause').fireEvent('mouseenter'); break;
				}
			}
		}.bind(this);
		this.events.keydown.push(keydown);
		var keyup = function(e){
			if (['left', 'right', 'p'].contains(e.key)){
				var controller = this.slideshow.retrieve('controller');
				if (controller.retrieve('hidden'))
					controller.store('hidden', false).fireEvent('hide'); 
				switch(e.key){
					case 'left': 
						this.slideshow.retrieve((e.shift) ? 'first' : 'prev').fireEvent('mouseleave'); break;
					case 'right': 
						this.slideshow.retrieve((e.shift) ? 'last' : 'next').fireEvent('mouseleave'); break;
					default:
						this.slideshow.retrieve('pause').fireEvent('mouseleave'); break;
				}
			}
		}.bind(this);
		this.events.keyup.push(keyup);
		var mousemove = function(e){
			var images = this.slideshow.retrieve('images').getCoordinates();
			if (e.page.x > images.left && e.page.x < images.right && e.page.y > images.top && e.page.y < images.bottom)
				this.slideshow.retrieve('controller').fireEvent('show');
			else
				this.slideshow.retrieve('controller').fireEvent('hide');
		}.bind(this);
		this.events.mousemove.push(mousemove);
		document.addEvents({'keydown': keydown, 'keyup': keyup, 'mousemove': mousemove});
		this.slideshow.retrieve('controller', controller).fireEvent('hide');
	},

/**
Private method: loader
	Builds the optional loader element, adds interactivity.
	This method can safely be removed if the loader option is not enabled.
*/

	_loader: function(){
 		if (this.options.loader === true) 
 			this.options.loader = {};
		var loader = new Element('div', {
			'class': this.classes.get('loader').substr(1),				
			'morph': $merge(this.options.loader, {'link': 'cancel'})
		}).store('hidden', false).store('i', 1).inject(this.slideshow.retrieve('images'));
		if (this.options.loader.animate){
			for (var i = 0; i < this.options.loader.animate[1]; i++)
				img = new Asset.image(this.options.loader.animate[0].replace(/#/, i));
			if (Browser.Engine.trident4 && this.options.loader.animate[0].contains('png'))
				loader.setStyle('backgroundImage', 'none');					
		}
		loader.set('events', {
			'animate': function(){  
				var loader = this.slideshow.retrieve('loader');				
				var i = (loader.retrieve('i').toInt() + 1) % this.options.loader.animate[1];
				loader.store('i', i);
				var img = this.options.loader.animate[0].replace(/#/, i);
				if (Browser.Engine.trident4 && this.options.loader.animate[0].contains('png'))
					loader.style.filter = 'progid:DXImageTransform.Microsoft.AlphaImageLoader(src="' + img + '", sizingMethod="scale")';
				else 
					loader.setStyle('backgroundImage', 'url(' + img + ')');
			}.bind(this),
			'hide': function(){  
				var loader = this.slideshow.retrieve('loader');
				if (!loader.retrieve('hidden')){
					loader.store('hidden', true).morph(this.classes.get('loader', 'hidden'));
					if (this.options.loader.animate)
						$clear(loader.retrieve('timer'));					
				}
			}.bind(this),
			'show': function(){  
				var loader = this.slideshow.retrieve('loader');
				if (loader.retrieve('hidden')){
					loader.store('hidden', false).morph(this.classes.get('loader', 'visible'));
					if (this.options.loader.animate)
						loader.store('timer', function(){this.fireEvent('animate');}.periodical(50, loader));
				}
			}.bind(this)
		});
		this.slideshow.retrieve('loader', loader).fireEvent('hide');
	},
	
/**
Private method: thumbnails
	Builds the optional thumbnails element, adds interactivity.
	This method can safely be removed if the thumbnails option is not enabled.
*/

	_thumbnails: function(){
 		if (this.options.thumbnails === true) 
 			this.options.thumbnails = {}; 
		var el = this.slideshow.getElement(this.classes.get('thumbnails'));
		var thumbnails = (el) ? el.empty() : new Element('div', {'class': this.classes.get('thumbnails').substr(1)}).inject(this.slideshow);
		thumbnails.setStyle('overflow', 'hidden');
		var ul = new Element('ul', {'tween': {'link': 'cancel'}}).inject(thumbnails);
		this.data.thumbnails.each(function(thumbnail, i){
			var li = new Element('li').inject(ul);
			var a = new Element('a', {
				'events': {
					'click': function(i){
  					this.pause(1);
						this.go(i);
						this.pause(0);
						return false; 
					}.pass(i, this),
					'loaded': function(){
						this.data.thumbnails.pop();
						if (!this.data.thumbnails.length){
							var div = thumbnails.getCoordinates();
							var props = thumbnails.retrieve('props');			
							var limit = 0, pos = props[1], size = props[2];		
							thumbnails.getElements('li').each(function(li){			
								var li = li.getCoordinates();		
								if (li[pos] > limit) limit = li[pos];
							}, this);			
							thumbnails.store('limit', div[size] + div[props[0]] - limit);
						}
					}.bind(this)
				},
				'href': this.options.hu + this.data.images[i],
				'morph': $merge(this.options.thumbnails, {'link': 'cancel'})
			}).inject(li);
			if (this.data.captions[i] && this.options.titles)
				a.set('title', this.data.captions[i].replace(/<.+?>/gm, '').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, "'"));
			var img = new Asset.image(this.options.hu + thumbnail, {
				'onload': function(){this.fireEvent('loaded');}.bind(a) 
			}).inject(a);
		}, this);
		thumbnails.set('events', {
			'scroll': function(n, fast){
				var div = this.getCoordinates();
				var ul = this.getElement('ul').getPosition();
				var props = this.retrieve('props');
				var axis = props[3], delta, pos = props[0], size = props[2], value;				
				var tween = this.getElement('ul').get('tween', {'property': pos});	
				if ($chk(n)){
					var li = this.getElements('li')[n].getCoordinates();
					delta = div[pos] + (div[size] / 2) - (li[size] / 2) - li[pos]	
					value = (ul[axis] - div[pos] + delta).limit(this.retrieve('limit'), 0);
					if (fast)	
						tween.set(value);
					else						 
						tween.start(value);
				}
				else{
					var area = div[props[2]] / 3, page = this.retrieve('page'), velocity = -0.2;			
					if (page[axis] < (div[pos] + area))
						delta = (page[axis] - div[pos] - area) * velocity;
					else if (page[axis] > (div[pos] + div[size] - area))
						delta = (page[axis] - div[pos] - div[size] + area) * velocity;			
					if (delta){			
						value = (ul[axis] - div[pos] + delta).limit(this.retrieve('limit'), 0);
						tween.set(value);
					}
				}				
			}.bind(thumbnails),
			'update': function(fast){
				var thumbnails = this.slideshow.retrieve('thumbnails');
				thumbnails.getElements('a').each(function(a, i){	
					if (i == this.slide){
						if (!a.retrieve('active', false)){
							a.store('active', true);
							var active = this.classes.get('thumbnails', 'active');							
							if (fast) a.get('morph').set(active);
							else a.morph(active);
						}
					} 
					else {
						if (a.retrieve('active', true)){
							a.store('active', false);
							var inactive = this.classes.get('thumbnails', 'inactive');						
							if (fast) a.get('morph').set(inactive);
							else a.morph(inactive);
						}
					}
				}, this);
				if (!thumbnails.retrieve('mouseover'))
					thumbnails.fireEvent('scroll', [this.slide, fast]);
			}.bind(this)
		})
		var div = thumbnails.getCoordinates();
		thumbnails.store('props', (div.height > div.width) ? ['top', 'bottom', 'height', 'y'] : ['left', 'right', 'width', 'x']);
		var mousemove = function(e){
			var div = this.getCoordinates();
			if (e.page.x > div.left && e.page.x < div.right && e.page.y > div.top && e.page.y < div.bottom){
				this.store('page', e.page);			
				if (!this.retrieve('mouseover')){
					this.store('mouseover', true);
					this.store('timer', function(){this.fireEvent('scroll');}.periodical(50, this));
				}
			}
			else {
				if (this.retrieve('mouseover')){
					this.store('mouseover', false);				
					$clear(this.retrieve('timer'));
				}
			}
		}.bind(thumbnails);
		this.events.mousemove.push(mousemove);
		document.addEvent('mousemove', mousemove);
		this.slideshow.store('thumbnails', thumbnails);
	}
});