var Lightbox = {
 init: function(options){
 this.options = Object.extend({
 resizeDuration: 400,
 resizeTransition: Fx.Transitions.sineInOut,
 initialWidth: 250,
 initialHeight: 250,
 animateCaption: {In:true,Out:true},
 container: document.body,
 showControls: false,
 showNumbers: true,
 descriptions: false,
 opacity: 0.7
 }, options || {});

 this.anchors = [];
 $each(document.links, function(el){
 if (el.rel && el.rel.test(/^lightbox/i)){
 el.onclick = this.click.pass(el, this);
 this.anchors.push(el);
 }
 }, this);
 this.eventKeyDown = this.keyboardListener.bindAsEventListener(this);
 this.eventPosition = this.position.bind(this);
 this.overlay = new Element('div').setProperty('id', 'lbOverlay').injectInside(this.options.container);
 this.center = new Element('div').setProperty('id', 'lbCenter').setStyles({width: this.options.initialWidth+'px', height: this.options.initialHeight+'px', marginLeft: '-'+(this.options.initialWidth/2)+'px', display: 'none'}).injectInside(this.options.container);
 this.image = new Element('div').setProperty('id', 'lbImage').injectInside(this.center);
 this.bottomContainer = new Element('div').setProperty('id', 'lbBottomContainer').setStyle('display', 'none').injectInside(this.options.container);
 this.bottom = new Element('div').setProperty('id', 'lbBottom').injectInside(this.bottomContainer);
 if(this.options.showControls){
 this.controlDiv = new Element('div').setProperty('id','lbControls').injectInside(this.bottom);
 }else{
 this.controlDiv = this.image;
 }
 this.prevLink = new Element('a').setProperties({id: 'lbPrevLink', href: '#'}).setStyle('display', 'none').injectInside(this.controlDiv);
 this.nextLink = this.prevLink.clone().setProperty('id', 'lbNextLink').injectInside(this.controlDiv);
 this.prevLink.onclick = this.previous.bind(this);
 this.nextLink.onclick = this.next.bind(this);
 this.closeButton = new Element('a').setProperties({id: 'lbCloseLink', href: '#'}).injectInside(this.bottom)
 this.closeButton.onclick = this.overlay.onclick = this.close.bind(this);
 this.caption = new Element('div').setProperty('id', 'lbCaption').injectInside(this.bottom);
 if(this.options.descriptions != false){
 this.options.descriptions = $$(this.options.descriptions);
 this.description = new Element('div').setProperty('id', 'lbDescription').injectInside(this.bottom);
 }
 if(this.options.showNumbers){
 this.number = new Element('div').setProperty('id', 'lbNumber').injectInside(this.bottom);
 }
 new Element('div').setStyle('clear', 'both').injectInside(this.bottom);
 var nextEffect = this.nextEffect.bind(this);
 this.fx = {
 overlay: this.overlay.effect('opacity', {duration: 500}).hide(),
 resize: this.center.effects({duration: this.options.resizeDuration, transition: this.options.resizeTransition, onComplete: nextEffect}),
 image: this.image.effect('opacity', {duration: 500, onComplete: nextEffect}),
 bottom: this.bottom.effect('margin-top', {duration: 400, onComplete: nextEffect})
 };
 this.preloadPrev = new Image();
 this.preloadNext = new Image();
 },
 click: function(link){
 if (link.rel.length == 8) return this.show(link.href, link.title);
 var j, imageNum, images = [];
 this.anchors.each(function(el){
 if (el.rel == link.rel){
 for (j = 0; j < images.length; j++) if(images[j][0] == el.href) break;
 if (j == images.length){
 images.push([el.href, el.title]);
 if (el.href == link.href) imageNum = j;
 }
 }
 }, this);
 return this.open(images, imageNum);
 },
 show: function(url, title){
 return this.open([[url, title]], 0);
 },
 open: function(images, imageNum){
 this.images = images;
 this.position();
 this.setup(true);
 this.top = window.getScrollTop() + (window.getHeight() / 15);
 this.window = {};
 this.window.height = window.getScrollHeight();
 this.window.width = window.getScrollWidth();
 this.window.top = window.getScrollTop();
 this.window.left = window.getScrollLeft();
 this.center.setStyles({top: this.top+'px', display: ''});
 this.fx.overlay.start(this.options.opacity);
 return this.changeImage(imageNum);
 },
 position: function(){
 if(this.options.container == document.body){
 var h = window.getScrollHeight()+'px';
 var w = window.getScrollWidth()+'px';
 this.overlay.setStyles({top: '0px', height: h, width: w});
 }else{
 var myCoords = this.options.container.getCoordinates();
 this.overlay.setStyles({
 top: myCoords.top+'px',
 height: myCoords.height+'px',
 left: myCoords.left+'px',
 width: myCoords.width+'px'
 });
 }
 },
 setup: function(open){
 var elements = $A(document.getElementsByTagName('object'));
 if (window.ie) elements.extend(document.getElementsByTagName('select'));
 elements.each(function(el){ el.style.visibility = open ? 'hidden' : ''; });
 var fn = open ? 'addEvent' : 'removeEvent';
 window[fn]('scroll', this.eventPosition)[fn]('resize', this.eventPosition);
 document[fn]('keydown', this.eventKeyDown);
 this.step = 0;
 },
 keyboardListener: function(event){
 switch (event.keyCode){
 case 27: case 88: case 67: this.close(); break;
 case 37: case 80: this.previous(); break;
 case 39: case 78: this.next();
 }
 },
 previous: function(){
 return this.changeImage(this.activeImage-1);
 },
 next: function(){
 return this.changeImage(this.activeImage+1);
 },
 changeImage: function(imageNum){
 if (this.step || (imageNum < 0) || (imageNum >= this.images.length)) return false;
 this.step = 1;
 this.activeImage = imageNum;
 if(this.options.animateCaption.In && this.bottom.offsetHeight){
 this.prevLink.style.display = this.nextLink.style.display = 'none';
 this.bottom.effect('margin-top', {duration: 300, onComplete: this.loadImage.bind(this)}).start(-this.bottom.offsetHeight);
 }else{
 this.bottomContainer.style.display = this.prevLink.style.display = this.nextLink.style.display = 'none';
 this.loadImage();
 }
 this.fx.image.hide();
 this.center.className = 'lbLoading';
 return false;
 },
 loadImage: function(){
 this.preload = new Image();
 this.preload.onload = this.nextEffect.bind(this);
 this.preload.src = this.images[this.activeImage][0];
 },
 nextEffect: function(){
 switch (this.step++){
 case 1:
 this.center.className = '';
 this.image.style.backgroundImage = 'url('+this.images[this.activeImage][0]+')';
 this.image.style.width = this.bottom.style.width = this.preload.width+'px';
 //this.image.style.height = this.prevLink.style.height = this.nextLink.style.height = this.preload.height+'px';
 if(this.options.showControls){
 this.image.style.height = this.preload.height+'px';
 }else{
 this.image.style.height = this.prevLink.style.height = this.nextLink.style.height = this.preload.height+'px';
 }
 this.caption.setHTML(this.images[this.activeImage][1] || '');
 if(this.options.descriptions != false){
 if(this.description.getFirst()){this.description.getFirst().remove()};
 var cl = this.options.descriptions[this.activeImage].clone();
 cl.setStyle('display', 'block').injectInside(this.description);
 }
 if(this.options.showNumbers){
 //this.number.setHTML((this.images.length == 1) ? '' : 'Image '+(this.activeImage+1)+' of '+this.images.length);
 this.number.setHTML((this.images.length == 1) ? '' : 'Slika '+(this.activeImage+1)+' od '+this.images.length);
 }

 if (this.activeImage) this.preloadPrev.src = this.images[this.activeImage-1][0];
 if (this.activeImage != (this.images.length - 1)) this.preloadNext.src = this.images[this.activeImage+1][0];
 if (this.center.clientHeight != this.image.offsetHeight){
 this.fx.resize.start({height: this.image.offsetHeight});
 break;
 }
 this.step++;
 case 2:
 if (this.center.clientWidth != this.image.offsetWidth){
 this.fx.resize.start({width: this.image.offsetWidth, marginLeft: -this.image.offsetWidth/2});
 break;
 }
 this.step++;
 case 3:
 this.bottomContainer.setStyles({top: (this.top + this.center.clientHeight)+'px', height: '0px', marginLeft: this.center.style.marginLeft, display: ''});
 this.fx.image.start(1);
 //var extra = this.closeButton.getStyle('height').toInt();
 var extra = this.caption.getStyle('height').toInt();
 if(this.options.descriptions != false){extra += this.description.getStyle('height').toInt()}
 if(this.options.showControls){extra += this.controlDiv.getStyle('height').toInt()}
 if(this.options.showNumbers){extra += this.number.getStyle('height').toInt()}

 this.closeButton.setStyle('marginTop', (extra-(this.closeButton.getStyle('height').toInt()*2))+'px');
 if(this.activeImage != 0) this.prevLink.style.display = '';
 if(this.activeImage != (this.images.length - 1)) this.nextLink.style.display = '';
 break;
 case 4:
 if (this.options.animateCaption.Out){
 this.fx.bottom.set(-this.bottom.offsetHeight);
 this.bottomContainer.style.height = '';
 this.fx.bottom.start(0);
 break;
 }
 this.bottomContainer.style.height = '';
 case 5:
 //if (this.activeImage) this.prevLink.style.display = '';
 //if (this.activeImage != (this.images.length - 1)) this.nextLink.style.display = '';
 this.step = 0;
 }
 },

 close: function(){
 if (this.step < 0) return;
 this.step = -1;
 if (this.preload){
 this.preload.onload = Class.empty;
 this.preload = null;
 }
 for (var f in this.fx) this.fx[f].stop();
 this.center.style.display = this.bottomContainer.style.display = 'none';
 this.fx.overlay.chain(this.setup.pass(false, this)).start(0);
 this.overlay.setStyles({height: this.window.height+'px', width: this.window.width+'px'});
 return false;
 }
};