var Lightbox={init: function(options){this.options=Object.extend({resizeDuration: 400,
initialWidth: 250,
initialHeight: 250,
animateCaption: true,
container: document.body,
showControls: false,
descriptions: false,
opacity: 0.7
}, options ||{});this.anchors=[];$A(document.getElementsByTagName('a')).each(function(el){if(el.rel && el.href && 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).setStyle('opacity',0);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.bottom=new Element('div').setProperty('id', 'lbBottom').setStyle('display', 'none').injectInside(this.options.container);if(this.options.showControls){var controlDiv=this.bottom;}else{var controlDiv=this.image;}
this.prevLink=new Element('a').setProperties({id:'lbPrevLink', href:'#'}).setStyle('display', 'none').injectInside(controlDiv);this.nextLink=this.prevLink.clone().setProperty('id', 'lbNextLink').injectInside(controlDiv);this.prevLink.onclick=this.previous.bind(this);this.nextLink.onclick=this.next.bind(this);new Element('div').setStyle('clear', 'both').injectInside(this.bottom);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);}
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}),
resize: this.center.effects({duration: this.options.resizeDuration, onComplete: nextEffect}),
image: this.image.effect('opacity',{duration: 500, onComplete: nextEffect}),
bottom: this.bottom.effects({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,this.options.opacity);return this.changeImage(imageNum);},
position: function(){
if(this.options.container==document.body){var h=Window.getScrollHeight()+'px';}else{var h=this.options.container.getStyle('height');}
this.overlay.setStyles({top:'0px', height: h});},
setup: function(open){var elements=$A(document.getElementsByTagName('object'));elements.extend(document.getElementsByTagName(window.ActiveXObject ? 'select' :'embed'));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;this.prevLink.style.display=this.nextLink.style.display='none';this.bottom.setStyles({opacity:'0', height:'0px', 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.setStyles({backgroundImage:'url('+this.images[this.activeImage][0]+')', width: this.preload.width+'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);}
this.number.setHTML((this.images.length==1)? '' :'Image '+(this.activeImage+1)+' of '+this.images.length);if(this.activeImage !=0)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.custom({height: [this.center.clientHeight, this.image.offsetHeight]});break;}
this.step++;case 2:
if(this.center.clientWidth !=this.image.offsetWidth){this.fx.resize.custom({width: [this.center.clientWidth, this.image.offsetWidth], marginLeft: [-this.center.clientWidth/2, -this.image.offsetWidth/2]});break;}
this.step++;case 3:
this.bottom.setStyles({top: (this.top+this.center.clientHeight)+'px', width: this.image.style.width, marginLeft: this.center.style.marginLeft, display:''});this.fx.image.custom(0, 1);if(this.options.descriptions !=false){var extra=this.description.getStyle('height').toInt()}else{var extra=0}
this.closeButton.setStyle('marginTop', this.caption.getStyle('height').toInt()+extra+this.number.getStyle('height').toInt()-this.closeButton.getStyle('height').toInt()+'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){this.fx.bottom.custom({opacity: [0, 1], height: [0, this.bottom.scrollHeight]});break;}
this.bottom.setStyles({opacity:'1', height: (this.bottom.scrollHeight)+'px'});case 5:
/*if(this.activeImage !=0)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].clearTimer();this.center.style.display=this.bottom.style.display='none';this.fx.overlay.start(this.options.opacity,0);return false;}};/*window.addEvent("load", initLightbox);function initLightbox(){Lightbox.init();}*/