var Lightbox={init: function(options){this.options=Object.extend({resizeDuration: 400,
resizeTransition: Fx.Transitions.sineInOut,
initialWidth: 250,
initialHeight: 250,
animateCaption: true
}, 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(document.body);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(document.body);this.image=new Element('div').setProperty('id', 'lbImage').injectInside(this.center);this.prevLink=new Element('a').setProperties({id:'lbPrevLink', href:'#'}).setStyle('display', 'none').injectInside(this.image);this.nextLink=this.prevLink.clone().setProperty('id', 'lbNextLink').injectInside(this.image);this.prevLink.onclick=this.previous.bind(this);this.nextLink.onclick=this.next.bind(this);this.bottomContainer=new Element('div').setProperty('id', 'lbBottomContainer').setStyle('display', 'none').injectInside(document.body);this.bottom=new Element('div').setProperty('id', 'lbBottom').injectInside(this.bottomContainer);new Element('a').setProperties({id:'lbCloseLink', href:'#'}).injectInside(this.bottom).onclick=this.overlay.onclick=this.close.bind(this);this.caption=new Element('div').setProperty('id', 'lbCaption').injectInside(this.bottom);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.center.setStyles({top: this.top+'px', display:''});this.fx.overlay.start(0.8);return this.changeImage(imageNum);},
position: function(){this.overlay.setStyles({top: window.getScrollTop()+'px', height: window.getHeight()+'px'});},
setup: function(open){var elements=$A(document.getElementsByTagName('object'));elements.extend(document.getElementsByTagName(window.ie ? 'select' :'embed'));elements.each(function(el){if (open)el.lbBackupStyle=el.style.visibility;el.style.visibility=open ? 'hidden' : el.lbBackupStyle;});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;this.center.style.backgroundColor='';this.bottomContainer.style.display=this.prevLink.style.display=this.nextLink.style.display='none';this.fx.image.hide();this.center.className='lbLoading';this.preload=new Image();this.preload.onload=this.nextEffect.bind(this);this.preload.src=this.images[imageNum][0];return false;},
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';this.caption.setHTML(this.images[this.activeImage][1]||'');this.number.setHTML((this.images.length==1)? '' :'Image '+(this.activeImage+1)+' of '+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);break;case 4:
this.center.style.backgroundColor='#000';if (this.options.animateCaption){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);return false;}};window.addEvent('domready', Lightbox.init.bind(Lightbox));