var Lightbox={activeImage:null,badObjects:['select','object','embed'],container:null,enableSlideshow:null,groupName:null,imageArray:[],options:null,overlayDuration:null,overlayOpacity:null,playSlides:null,refTags:['a','area'],relAttribute:null,resizeDuration:null,slideShowTimer:null,startImage:null,initialize:function(options){if(!document.getElementsByTagName){return}this.options=$H({animate:false,autoPlay:false,borderSize:10,containerID:document,enableSlideshow:true,googleAnalytics:false,imageDataLocation:'south',initImage:'',loop:true,overlayDuration:.2,overlayOpacity:.8,prefix:'',relAttribute:'lightbox',resizeSpeed:10,showGroupName:false,slideTime:4,strings:{closeLink:'close',loadingMsg:'loading',nextLink:'next »',prevLink:'« prev',startSlideshow:'start slideshow',stopSlideshow:'stop slideshow',numDisplayPrefix:'Image',numDisplaySeparator:'of'}}).merge(options);if(this.options.animate){this.overlayDuration=Math.max(this.options.overlayDuration,0);this.options.resizeSpeed=Math.max(Math.min(this.options.resizeSpeed,10),1);this.resizeDuration=(11-this.options.resizeSpeed)*0.15}else{this.overlayDuration=0;this.resizeDuration=0}this.enableSlideshow=this.options.enableSlideshow;this.overlayOpacity=Math.max(Math.min(this.options.overlayOpacity,1),0);this.playSlides=this.options.autoPlay; this.container=$(this.options.containerID); this.relAttribute=this.options.relAttribute;this.updateImageList();var objBody=this.container!=document?this.container:document.getElementsByTagName('body').item(0);var objOverlay=document.createElement('div');objOverlay.setAttribute('id',this.getID('overlay'));objOverlay.style.display='none';objBody.appendChild(objOverlay);Event.observe(objOverlay,'click',this.end.bindAsEventListener(this));var objLightbox=document.createElement('div');objLightbox.setAttribute('id',this.getID('lightbox'));objLightbox.style.display='none';objBody.appendChild(objLightbox);var objImageDataContainer=document.createElement('div');objImageDataContainer.setAttribute('id',this.getID('imageDataContainer'));objImageDataContainer.className=this.getID('clearfix');var objImageData=document.createElement('div');objImageData.setAttribute('id',this.getID('imageData'));objImageDataContainer.appendChild(objImageData);var objImageDetails=document.createElement('div');objImageDetails.setAttribute('id',this.getID('imageDetails'));objImageData.appendChild(objImageDetails);var objCaption=document.createElement('span');objCaption.setAttribute('id',this.getID('caption'));objImageDetails.appendChild(objCaption);var objNumberDisplay=document.createElement('span');objNumberDisplay.setAttribute('id',this.getID('numberDisplay'));objImageDetails.appendChild(objNumberDisplay);var objDetailsNav=document.createElement('span');objDetailsNav.setAttribute('id',this.getID('detailsNav'));objImageDetails.appendChild(objDetailsNav);var objPrevLink=document.createElement('a');objPrevLink.setAttribute('id',this.getID('prevLinkDetails'));objPrevLink.setAttribute('href','javascript:void(0);');objPrevLink.innerHTML=this.options.strings.prevLink;objDetailsNav.appendChild(objPrevLink);Event.observe(objPrevLink,'click',this.showPrev.bindAsEventListener(this));var objNextLink=document.createElement('a');objNextLink.setAttribute('id',this.getID('nextLinkDetails'));objNextLink.setAttribute('href','javascript:void(0);');objNextLink.innerHTML=this.options.strings.nextLink;objDetailsNav.appendChild(objNextLink);Event.observe(objNextLink,'click',this.showNext.bindAsEventListener(this));var objSlideShowControl=document.createElement('a');objSlideShowControl.setAttribute('id',this.getID('slideShowControl'));objSlideShowControl.setAttribute('href','javascript:void(0);');objDetailsNav.appendChild(objSlideShowControl);Event.observe(objSlideShowControl,'click',this.toggleSlideShow.bindAsEventListener(this));var objClose=document.createElement('div');objClose.setAttribute('id',this.getID('close'));objImageData.appendChild(objClose);var objCloseLink=document.createElement('a');objCloseLink.setAttribute('id',this.getID('closeLink'));objCloseLink.setAttribute('href','javascript:void(0);');objCloseLink.innerHTML=this.options.strings.closeLink;objClose.appendChild(objCloseLink);Event.observe(objCloseLink,'click',this.end.bindAsEventListener(this));if(this.options.imageDataLocation=='north'){objLightbox.appendChild(objImageDataContainer)}var objOuterImageContainer=document.createElement('div');objOuterImageContainer.setAttribute('id',this.getID('outerImageContainer'));objLightbox.appendChild(objOuterImageContainer);var objImageContainer=document.createElement('div');objImageContainer.setAttribute('id',this.getID('imageContainer'));objOuterImageContainer.appendChild(objImageContainer);var objLightboxImage=document.createElement('img');objLightboxImage.setAttribute('id',this.getID('lightboxImage'));objImageContainer.appendChild(objLightboxImage);var objHoverNav=document.createElement('div');objHoverNav.setAttribute('id',this.getID('hoverNav'));objImageContainer.appendChild(objHoverNav);var objPrevLinkImg=document.createElement('a');objPrevLinkImg.setAttribute('id',this.getID('prevLinkImg'));objPrevLinkImg.setAttribute('href','javascript:void(0);');objHoverNav.appendChild(objPrevLinkImg);Event.observe(objPrevLinkImg,'click',this.showPrev.bindAsEventListener(this));var objNextLinkImg=document.createElement('a');objNextLinkImg.setAttribute('id',this.getID('nextLinkImg'));objNextLinkImg.setAttribute('href','javascript:void(0);');objHoverNav.appendChild(objNextLinkImg);Event.observe(objNextLinkImg,'click',this.showNext.bindAsEventListener(this));var objLoading=document.createElement('div');objLoading.setAttribute('id',this.getID('loading'));objImageContainer.appendChild(objLoading);var objLoadingLink=document.createElement('a');objLoadingLink.setAttribute('id',this.getID('loadingLink'));objLoadingLink.setAttribute('href','javascript:void(0);');objLoadingLink.innerHTML=this.options.strings.loadingMsg;objLoading.appendChild(objLoadingLink);Event.observe(objLoadingLink,'click',this.end.bindAsEventListener(this));if(this.options.imageDataLocation!='north'){objLightbox.appendChild(objImageDataContainer)}if(this.options.initImage!=''){this.start($(this.options.initImage))}},
updateImageList:function()
{var el,els,rel;
for(var i=0;i<this.refTags.length;i++)
{els=this.container.getElementsByTagName(this.refTags[i]);
for(var j=0;j<els.length;j++){el=els[j];rel=String(el.getAttribute('rel'));
if(el.getAttribute('href')&&(rel.toLowerCase().match(this.relAttribute)))
{el.onclick=function()
{Lightbox.start(this);return false}}}}},
start:function(imageLink){this.hideBadObjects();var pageSize=this.getPageSize();$(this.getID('overlay')).setStyle({height:pageSize.pageHeight+'px'});new Effect.Appear(this.getID('overlay'),{duration:this.overlayDuration,from:0,to:this.overlayOpacity});this.imageArray=[];this.groupName=null;var rel=imageLink.getAttribute('rel');var imageTitle=imageLink.getAttribute('title');if(rel==this.relAttribute){imageTitle=imageLink.getAttribute('title')?imageLink.getAttribute('title'):'';this.imageArray.push({'link':imageLink.getAttribute('href'),'title':imageTitle});this.startImage=0}else{for(var i=0;i<imgShow.length;i++){var el=imgShow[i][0];this.imageArray.push({'link':el,'title':imgShow[i][1]});if(el==imageLink){this.startImage=this.imageArray.length-1}}this.groupName=rel.substring(this.relAttribute.length+1,rel.length-1)}var pageScroll=this.getPageScroll();var lightboxTop=pageScroll.y+(pageSize.winHeight/15);$(this.getID('lightbox')).setStyle({top:lightboxTop+'px'}).show();this.changeImage(this.startImage)},
	changeImage: function(imageNum){	
		this.activeImage = imageNum;
		this.disableKeyboardNav();
		this.pauseSlideShow();
		$(this.getID('loading')).show();
		$(this.getID('lightboxImage')).hide();
		$(this.getID('hoverNav')).hide();
		var imgPreloader = new Image();
		imgPreloader.onload=function(){
			$(Lightbox.getID('lightboxImage')).src = imgPreloader.src;
			Lightbox.resizeImageContainer(imgPreloader.width,imgPreloader.height);}
		imgPreloader.src = this.imageArray[this.activeImage].link;
		if(this.options.googleAnalytics){urchinTracker(this.imageArray[this.activeImage].link);}},
resizeImageContainer:function(imgWidth,imgHeight){var cDims=$(this.getID('outerImageContainer')).getDimensions();var xScale=((imgWidth+(this.options.borderSize*2))/cDims.width)*100;var yScale=((imgHeight+(this.options.borderSize*2))/cDims.height)*100;var wDiff=(cDims.width-this.options.borderSize*2)-imgWidth;var hDiff=(cDims.height-this.options.borderSize*2)-imgHeight;if(!(hDiff==0)){new Effect.Scale(this.getID('outerImageContainer'),yScale,{scaleX:false,duration:this.resizeDuration,queue:'front'})}if(!(wDiff==0)){new Effect.Scale(this.getID('outerImageContainer'),xScale,{scaleY:false,delay:this.resizeDuration,duration:this.resizeDuration})}if((hDiff==0)&&(wDiff==0)){if(navigator.appVersion.indexOf('MSIE')!=-1){this.pause(250)}else{this.pause(100)}}$(this.getID('prevLinkImg')).setStyle({height:imgHeight+'px'});$(this.getID('nextLinkImg')).setStyle({height:imgHeight+'px'});$(this.getID('imageDataContainer')).setStyle({width:(imgWidth+(this.options.borderSize*2))+'px'});this.showImage()},
showImage:function(){$(this.getID('loading')).hide();new Effect.Appear(this.getID('lightboxImage'),{duration:0,queue:'end',afterFinish:function(){Lightbox.updateDetails()}});this.preloadNeighborImages()},updateDetails:function(){$(this.getID('caption')).show();$(this.getID('caption')).update(this.imageArray[this.activeImage].title);if(this.imageArray.length>1){var num_display=this.options.strings.numDisplayPrefix+' '+eval(this.activeImage+1)+' '+this.options.strings.numDisplaySeparator+' '+this.imageArray.length;if(this.options.showGroupName&&this.groupName!=''){num_display+=' '+this.options.strings.numDisplaySeparator+' '+this.groupName}$(this.getID('numberDisplay')).update(num_display).show();if(!this.enableSlideshow){$(this.getID('slideShowControl')).hide()}$(this.getID('detailsNav')).show()}new Effect.Parallel([new Effect.Appear(this.getID('imageDataContainer'),{sync:true})],{duration:0.0,afterFinish:function(){Lightbox.updateNav()}})},updateNav:function(){if(this.imageArray.length>1){$(this.getID('hoverNav')).show();if(this.enableSlideshow){if(this.playSlides){this.startSlideShow()}else{this.stopSlideShow()}}}this.enableKeyboardNav()},
startSlideShow:function(){this.playSlides=true;this.slideShowTimer=new PeriodicalExecuter(function(pe){Lightbox.showNext();pe.stop()},this.options.slideTime);$(this.getID('slideShowControl')).update(this.options.strings.stopSlideshow)},stopSlideShow:function(){this.playSlides=false;if(this.slideShowTimer){this.slideShowTimer.stop()}$(this.getID('slideShowControl')).update(this.options.strings.startSlideshow)},toggleSlideShow:function(){if(this.playSlides){this.stopSlideShow()}else{this.startSlideShow()}},pauseSlideShow:function(){if(this.slideShowTimer){this.slideShowTimer.stop()}},
showNext:function(){if(this.imageArray.length>1){if(!this.options.loop&&((this.activeImage==this.imageArray.length-1&&this.startImage==0)||(this.activeImage+1==this.startImage))){return this.end()}if(this.activeImage==this.imageArray.length-1){this.changeImage(0)}else{this.changeImage(this.activeImage+1)}}},showPrev:function(){if(this.imageArray.length>1){if(this.activeImage==0){this.changeImage(this.imageArray.length-1)}else{this.changeImage(this.activeImage-1)}}},showFirst:function(){if(this.imageArray.length>1){this.changeImage(0)}},showLast:function(){if(this.imageArray.length>1){this.changeImage(this.imageArray.length-1)}},
enableKeyboardNav:function(){document.onkeydown=this.keyboardAction},disableKeyboardNav:function(){document.onkeydown=''},
keyboardAction:function(e){if(e==null){keycode=event.keyCode}else{keycode=e.which}key=String.fromCharCode(keycode).toLowerCase();if(key=='x'||key=='o'||key=='c'){Lightbox.end()}else if(key=='p'||key=='%'){Lightbox.showPrev()}else if(key=='n'||key=='\''){Lightbox.showNext()}else if(key=='f'){Lightbox.showFirst()}else if(key=='l'){Lightbox.showLast()}else if(key=='s'){if(Lightbox.imageArray.length>0&&Lightbox.options.enableSlideshow){Lightbox.toggleSlideShow()}}},
preloadNeighborImages: function(){
var nextImageID = this.imageArray.length - 1 == this.activeImage ? 0 : this.activeImage + 1;
nextImage = new Image();
nextImage.src = this.imageArray[nextImageID].link
var prevImageID = this.activeImage == 0 ? this.imageArray.length - 1 : this.activeImage - 1;
prevImage = new Image();
prevImage.src = this.imageArray[prevImageID].link;},
end:function(){this.disableKeyboardNav();this.pauseSlideShow();$(this.getID('lightbox')).hide();new Effect.Fade(this.getID('overlay'),{duration:this.overlayDuration});this.showBadObjects()},
showBadObjects:function(){var els;var tags=Lightbox.badObjects;for(var i=0;i<tags.length;i++){els=document.getElementsByTagName(tags[i]);for(var j=0;j<els.length;j++){$(els[j]).setStyle({visibility:'visible'})}}},hideBadObjects:function(){var els;var tags=Lightbox.badObjects;for(var i=0;i<tags.length;i++){els=document.getElementsByTagName(tags[i]);for(var j=0;j<els.length;j++){$(els[j]).setStyle({visibility:'hidden'})}}},pause:function(numberMillis){var now=new Date();var exitTime=now.getTime()+numberMillis;while(true){now=new Date();if(now.getTime()>exitTime)return}},getPageScroll:function(){var x,y;if(self.pageYOffset){x=self.pageXOffset;y=self.pageYOffset}else if(document.documentElement&&document.documentElement.scrollTop){x=document.documentElement.scrollLeft;y=document.documentElement.scrollTop}else if(document.body){x=document.body.scrollLeft;y=document.body.scrollTop}return{x:x,y:y}},
getPageSize:function(){var scrollX,scrollY,windowX,windowY,pageX,pageY;if(window.innerHeight&&window.scrollMaxY){scrollX=document.body.scrollWidth;scrollY=window.innerHeight+window.scrollMaxY}else if(document.body.scrollHeight>document.body.offsetHeight){scrollX=document.body.scrollWidth;scrollY=document.body.scrollHeight}else{scrollX=document.body.offsetWidth;scrollY=document.body.offsetHeight}if(self.innerHeight){windowX=self.innerWidth;windowY=self.innerHeight}else if(document.documentElement&&document.documentElement.clientHeight){windowX=document.documentElement.clientWidth;windowY=document.documentElement.clientHeight}else if(document.body){windowX=document.body.clientWidth;windowY=document.body.clientHeight}pageY=(scrollY<windowY)?windowY:scrollY;pageX=(scrollX<windowX)?windowX:scrollX;return{pageWidth:pageX,pageHeight:pageY,winWidth:windowX,winHeight:windowY}},getID:function(id){return this.options.prefix+id}
}
Event.observe(window,'load',function(){ Lightbox.initialize(); });