// For original FULL CODE COMMENTS grab the original lightbox source: http://www.huddletogether.com/projects/lightbox2/releases/lightbox2.03.3.zip

//	Lightbox v2.03.3 by Lokesh Dhakar

//	http://huddletogether.com/projects/lightbox2/

//	Licensed under the Creative Commons Attribution 2.5 License

// -----------------------------------------------------------------------------------

//	Configuration

var overlayOpacity = 0.8;	// controls transparency of shadow overlay

var animate = true;			// toggles resizing animations

var resizeSpeed = 9;		// controls the speed of the image resizing animations (1=slowest and 10=fastest)

var borderSize = 10;		//if you adjust the padding in the CSS, you will need to update this variable

// -----------------------------------------------------------------------------------

//	Global Variables

var imageArray = new Array;

var activeImage;

if(animate == true){

	overlayDuration = 0.2;	// shadow fade in/out duration

	if(resizeSpeed > 10){ resizeSpeed = 10;}

	if(resizeSpeed < 1){ resizeSpeed = 1;}

	resizeDuration = (11 - resizeSpeed) * 0.15;

} else { 

	overlayDuration = 0;

	resizeDuration = 0;

}

// -----------------------------------------------------------------------------------

//	Additional methods for Element

Object.extend(Element, {

	getWidth: function(element) {

	   	element = $(element);

	   	return element.offsetWidth; 

	},

	setWidth: function(element,w) {

	   	element = $(element);

    	element.style.width = w +"px";

	},

	setHeight: function(element,h) {

   		element = $(element);

    	element.style.height = h +"px";

	},

	setTop: function(element,t) {

	   	element = $(element);

    	element.style.top = t +"px";

	},

	setLeft: function(element,l) {

	   	element = $(element);

    	element.style.left = l +"px";

	},

	setSrc: function(element,src) {

    	element = $(element);

    	element.src = src; 

	},

	setHref: function(element,href) {

    	element = $(element);

    	element.href = href; 

	},

	setInnerHTML: function(element,content) {

		element = $(element);

		element.innerHTML = content;

	}

});

// -----------------------------------------------------------------------------------

//	Extending built-in Array object

//	- array.removeDuplicates()

//	- array.empty()

Array.prototype.removeDuplicates = function () {

    for(i = 0; i < this.length; i++){

        for(j = this.length-1; j>i; j--){        

            if(this[i][0] == this[j][0]){

                this.splice(j,1);

            }

        }

    }

}

// -----------------------------------------------------------------------------------

Array.prototype.empty = function () {

	for(i = 0; i <= this.length; i++){

		this.shift();

	}

}

// -----------------------------------------------------------------------------------

var Lightbox = Class.create();

Lightbox.prototype = {

	// initialize()

	// Constructor runs on completion of the DOM loading. Calls updateImageList and then

	// the function inserts html at the bottom of the page which is used to display the shadow 

	// overlay and the image container.

	initialize: function() {	

		

		this.updateImageList();

		var objBody = document.getElementsByTagName("body").item(0);

		var objOverlay = document.createElement("div");

		objOverlay.setAttribute('id','stimuli_overlay');

		objOverlay.style.display = 'none';

		objOverlay.onclick = function() { myLightbox.end(); }

		objBody.appendChild(objOverlay);

		var objLightbox = document.createElement("div");

		objLightbox.setAttribute('id','stimuli_lightbox');

		objLightbox.style.display = 'none';

		objLightbox.onclick = function(e) {	// close Lightbox if user clicks shadow overlay

			if (!e) var e = window.event;

			var clickObj = Event.element(e).id;

			if ( clickObj == 'stimuli_lightbox') {

				myLightbox.end();

			}

		};

		objBody.appendChild(objLightbox);

		var objOuterImageContainer = document.createElement("div");

		objOuterImageContainer.setAttribute('id','stimuli_outerImageContainer');

		objLightbox.appendChild(objOuterImageContainer);

		// When Lightbox starts it will resize itself from 250 by 250 to the current image dimension.

		// If animations are turned off, it will be hidden as to prevent a flicker of a

		// white 250 by 250 box.

		if(animate){

			Element.setWidth('stimuli_outerImageContainer', 250);

			Element.setHeight('stimuli_outerImageContainer', 250);			

		} else {

			Element.setWidth('stimuli_outerImageContainer', 1);

			Element.setHeight('stimuli_outerImageContainer', 1);			

		}

		var objImageContainer = document.createElement("div");

		objImageContainer.setAttribute('id','stimuli_imageContainer');

		objOuterImageContainer.appendChild(objImageContainer);

	

		var objLightboxImage = document.createElement("img");

		objLightboxImage.setAttribute('id','stimuli_lightboxImage');

		objImageContainer.appendChild(objLightboxImage);

	

		var objHoverNav = document.createElement("div");

		objHoverNav.setAttribute('id','stimuli_hoverNav');

		objImageContainer.appendChild(objHoverNav);

	

		var objPrevLink = document.createElement("a");

		objPrevLink.setAttribute('id','stimuli_prevLink');

		objPrevLink.setAttribute('href','#');

		objHoverNav.appendChild(objPrevLink);

		

		var objNextLink = document.createElement("a");

		objNextLink.setAttribute('id','stimuli_nextLink');

		objNextLink.setAttribute('href','#');

		objHoverNav.appendChild(objNextLink);

	

		var objLoading = document.createElement("div");

		objLoading.setAttribute('id','stimuli_loading');

		objImageContainer.appendChild(objLoading);

	

		var objLoadingLink = document.createElement("a");

		objLoadingLink.setAttribute('id','stimuli_loadingLink');

		objLoadingLink.setAttribute('href','#');

		objLoadingLink.onclick = function() { myLightbox.end(); return false; }

		objLoading.appendChild(objLoadingLink);



		var objImageDataContainer = document.createElement("div");

		objImageDataContainer.setAttribute('id','stimuli_imageDataContainer');

		objLightbox.appendChild(objImageDataContainer);

		var objImageData = document.createElement("div");

		objImageData.setAttribute('id','stimuli_imageData');

		objImageDataContainer.appendChild(objImageData);

	

		var objImageDetails = document.createElement("div");

		objImageDetails.setAttribute('id','stimuli_imageDetails');

		objImageData.appendChild(objImageDetails);

	

		var objCaption = document.createElement("span");

		objCaption.setAttribute('id','stimuli_caption');

		objImageDetails.appendChild(objCaption);

	

		var objNumberDisplay = document.createElement("span");

		objNumberDisplay.setAttribute('id','stimuli_numberDisplay');

		objImageDetails.appendChild(objNumberDisplay);

		

		var objBottomNav = document.createElement("div");

		objBottomNav.setAttribute('id','stimuli_bottomNav');

		objImageData.appendChild(objBottomNav);

	

		var objBottomNavCloseLink = document.createElement("a");

		objBottomNavCloseLink.setAttribute('id','stimuli_bottomNavClose');

		objBottomNavCloseLink.setAttribute('href','#');

		objBottomNavCloseLink.onclick = function() { myLightbox.end(); return false; }

		objBottomNav.appendChild(objBottomNavCloseLink);

		Element.show('stimuli_hoverNav');

		Element.show('stimuli_prevLink');

		Element.show('stimuli_nextLink');

	},

	// updateImageList()

	// Loops through anchor tags looking for 'lightbox' references and applies onclick

	// events to appropriate links. You can rerun after dynamically adding images w/ajax.

	updateImageList: function() {	

		if (!document.getElementsByTagName){ return; }

		var anchors = document.getElementsByTagName('a');

		var areas = document.getElementsByTagName('area');

		// loop through all anchor tags

		for (var i=0; i<anchors.length; i++){

			var anchor = anchors[i];

			var relAttribute = String(anchor.getAttribute('rel'));

			// use the string.match() method to catch 'lightbox' references in the rel attribute

			if (anchor.getAttribute('href') && (relAttribute.toLowerCase().match('lightbox'))){

				anchor.onclick = function () {myLightbox.start(this); return false;}

			}

		}

		// loop through all area tags

		// todo: combine anchor & area tag loops

		for (var i=0; i< areas.length; i++){

			var area = areas[i];

			var relAttribute = String(area.getAttribute('rel'));

			// use the string.match() method to catch 'lightbox' references in the rel attribute

			if (area.getAttribute('href') && (relAttribute.toLowerCase().match('lightbox'))){

				area.onclick = function () {myLightbox.start(this); return false;}

			}

		}

	},

	//	start()

	//	Display overlay and lightbox. If image is part of a set, add siblings to imageArray.

	start: function(imageLink) {	

		hideSelectBoxes();

		hideFlash();

		// stretch overlay to fill page and fade in

		var arrayPageSize = getPageSize();

		Element.setWidth('stimuli_overlay', arrayPageSize[0]);

		Element.setHeight('stimuli_overlay', arrayPageSize[1]);

		new Effect.Appear('stimuli_overlay', { duration: overlayDuration, from: 0.0, to: overlayOpacity });

		imageArray = [];

		imageNum = 0;		

		if (!document.getElementsByTagName){ return; }

		var anchors = document.getElementsByTagName( imageLink.tagName);

		var stimuli_image_title = "";

		// if image is NOT part of a set... ie not lightbox[someset]

		if((imageLink.getAttribute('rel') == 'lightbox')){

			// check for title-less links, and grab image title if needed

			stimuli_image_title = "";

			var possibleLightboxImageTitles = [imageLink.getAttribute('title'), imageLink.childNodes[0]['title'], imageLink.childNodes[0]['alt'], " "];

			var possible_Int = 0;

			while (stimuli_image_title == ("")) {

				stimuli_image_title = possibleLightboxImageTitles[possible_Int];

				possible_Int++;

			}

			// add single image to imageArray

			imageArray.push(new Array(imageLink.getAttribute('href'), stimuli_image_title));

		} else {

		// if image is part of a set... ie lightbox[someset]

			// loop through anchors, find other images in set, and add them to imageArray

			for (var i=0; i<anchors.length; i++){

				var anchor = anchors[i];

				if (anchor.getAttribute('href') && (anchor.getAttribute('rel') == imageLink.getAttribute('rel'))){

					// check for title-less links, and grab image title if needed

					stimuli_image_title = "";

					var possibleLightboxImageTitles = [ anchor['title'], anchor.childNodes[0]['title'], anchor.childNodes[0]['alt'], " " ];

					var possible_Int = 0;

					while (stimuli_image_title == ("")) {

						stimuli_image_title = possibleLightboxImageTitles[possible_Int];

						possible_Int++;

					}

					imageArray.push(new Array(anchor.getAttribute('href'), stimuli_image_title));

				}

			}

			imageArray.removeDuplicates();

			while(imageArray[imageNum][0] != imageLink.getAttribute('href')) { imageNum++;}

		}

		// calculate top and left offset for the lightbox 

		var arrayPageScroll = getPageScroll();

		var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 10);

		var lightboxLeft = arrayPageScroll[0];

		Element.setTop('stimuli_lightbox', lightboxTop);

		Element.setLeft('stimuli_lightbox', lightboxLeft);

		Element.show('stimuli_lightbox');

		this.changeImage(imageNum);

	},

	//	changeImage()

	//	Hide most elements and preload image in preparation for resizing image container.

	changeImage: function(imageNum) {	

		activeImage = imageNum;	// update global var

		// hide elements during transition

		if(animate){ Element.show('stimuli_loading');}

		Element.hide('stimuli_lightboxImage');

		Element.hide('stimuli_hoverNav');

		Element.hide('stimuli_prevLink');

		Element.hide('stimuli_nextLink');

		Element.hide('stimuli_imageDataContainer');

		Element.hide('stimuli_numberDisplay');		

		imgPreloader = new Image();

		// once image is preloaded, resize image container

		imgPreloader.onload=function(){

			Element.setSrc('stimuli_lightboxImage', imageArray[activeImage][0]);

			Element.setWidth('stimuli_lightboxImage', imgPreloader.width);

			Element.setHeight('stimuli_lightboxImage', imgPreloader.height);

			myLightbox.resizeImageContainer(imgPreloader.width, imgPreloader.height);

			imgPreloader.onload=function(){};	//	clear onLoad, IE behaves irratically with animated gifs otherwise 

		}

		imgPreloader.src = imageArray[activeImage][0];

	},

	//	resizeImageContainer()

	resizeImageContainer: function( imgWidth, imgHeight) {

		// get curren width and height

		this.widthCurrent = Element.getWidth('stimuli_outerImageContainer');

		this.heightCurrent = Element.getHeight('stimuli_outerImageContainer');

		// get new width and height

		var widthNew = (imgWidth  + (borderSize * 2));

		var heightNew = (imgHeight  + (borderSize * 2));

		// scalars based on change from old to new

		this.xScale = ( widthNew / this.widthCurrent) * 100;

		this.yScale = ( heightNew / this.heightCurrent) * 100;

		// calculate size difference between new and old image, and resize if necessary

		wDiff = this.widthCurrent - widthNew;

		hDiff = this.heightCurrent - heightNew;

		if(!( hDiff == 0)){ new Effect.Scale('stimuli_outerImageContainer', this.yScale, {scaleX: false, duration: resizeDuration, queue: 'front'}); }

		if(!( wDiff == 0)){ new Effect.Scale('stimuli_outerImageContainer', this.xScale, {scaleY: false, delay: resizeDuration, duration: resizeDuration}); }

		// if new and old image are same size and no scaling transition is necessary, 

		// do a quick stimuli_pause to prevent image flicker.

		if((hDiff == 0) && (wDiff == 0)){

			if (navigator.appVersion.indexOf("MSIE")!=-1){ stimuli_pause(250); } else { stimuli_pause(100);} 

		}

		Element.setHeight('stimuli_prevLink', imgHeight);

		Element.setHeight('stimuli_nextLink', imgHeight);

		Element.setWidth( 'stimuli_imageDataContainer', widthNew);

		this.showImage();

	},

	//	showImage()

	//	Display image and begin preloading neighbors.

	showImage: function(){

		Element.hide('stimuli_loading');

		new Effect.Appear('stimuli_lightboxImage', { duration: resizeDuration, queue: 'end', afterFinish: function(){	myLightbox.updateDetails(); } });

		this.preloadNeighborImages();

	},

	//	updateDetails()

	//	Display caption, image number, and bottom nav.

	updateDetails: function() {

		// if caption is not null

		if(imageArray[activeImage][1]){

			Element.show('stimuli_caption');

			Element.setInnerHTML( 'stimuli_caption', imageArray[activeImage][1]);

		}

		// if image is part of set display 'Image x of x' 

		if(imageArray.length > 1){

			Element.show('stimuli_numberDisplay');

			Element.setInnerHTML( 'stimuli_numberDisplay', "Bild " + eval(activeImage + 1) + " av " + imageArray.length);

		}

		new Effect.Parallel(

			[ new Effect.SlideDown( 'stimuli_imageDataContainer', { sync: true, duration: resizeDuration, from: 0.0, to: 1.0 }), 

			  new Effect.Appear('stimuli_imageDataContainer', { sync: true, duration: resizeDuration }) ], 

			{ duration: resizeDuration, afterFinish: function() {

				// update overlay size and update nav

				var arrayPageSize = getPageSize();

				Element.setHeight('stimuli_overlay', arrayPageSize[1]);

				myLightbox.updateNav();

				}

			} 

		);

	},

	//	updateNav()

	//	Display appropriate previous and next hover navigation.

	updateNav: function() {

		Element.show('stimuli_hoverNav');				

		// if not first image in set, display prev image button

		if(activeImage != 0){

			Element.show('stimuli_prevLink');

			document.getElementById('stimuli_prevLink').onclick = function() {

				myLightbox.changeImage(activeImage - 1); return false;

			}

		}

		// if not last image in set, display next image button

		if(activeImage != (imageArray.length - 1)){

			Element.show('stimuli_nextLink');

			document.getElementById('stimuli_nextLink').onclick = function() {

				myLightbox.changeImage(activeImage + 1); return false;

			}

		}

		this.enableKeyboardNav();

	},

	//	enableKeyboardNav()

	enableKeyboardNav: function() {

		document.onkeydown = this.keyboardAction; 

	},

	//	disableKeyboardNav()

	disableKeyboardNav: function() {

		document.onkeydown = '';

	},

	//	keyboardAction()

	keyboardAction: function(e) {

		if (e == null) { // ie

			keycode = event.keyCode;

			escapeKey = 27;

		} else { // mozilla

			keycode = e.keyCode;

			escapeKey = e.DOM_VK_ESCAPE;

		}

		key = String.fromCharCode(keycode).toLowerCase();

		if((key == 'x') || (key == 'o') || (key == 'c') || (keycode == escapeKey)){	// close lightbox

			myLightbox.end();

		} else if((key == 'p') || (keycode == 37)){	// display previous image

			if(activeImage != 0){

				myLightbox.disableKeyboardNav();

				myLightbox.changeImage(activeImage - 1);

			}

		} else if((key == 'n') || (keycode == 39)){	// display next image

			if(activeImage != (imageArray.length - 1)){

				myLightbox.disableKeyboardNav();

				myLightbox.changeImage(activeImage + 1);

			}

		}

	},

	//	preloadNeighborImages()

	//	Preload previous and next images.

	preloadNeighborImages: function(){

		if((imageArray.length - 1) > activeImage){

			preloadNextImage = new Image();

			preloadNextImage.src = imageArray[activeImage + 1][0];

		}

		if(activeImage > 0){

			preloadPrevImage = new Image();

			preloadPrevImage.src = imageArray[activeImage - 1][0];

		}

	},

	//	end()

	end: function() {

		this.disableKeyboardNav();

		Element.hide('stimuli_lightbox');

		new Effect.Fade('stimuli_overlay', { duration: overlayDuration});

		showSelectBoxes();

		showFlash();

	}

}

// -----------------------------------------------------------------------------------

// getPageScroll()

function getPageScroll(){

	var xScroll, yScroll;

	if (self.pageYOffset) {

		yScroll = self.pageYOffset;

		xScroll = self.pageXOffset;

	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict

		yScroll = document.documentElement.scrollTop;

		xScroll = document.documentElement.scrollLeft;

	} else if (document.body) {// all other Explorers

		yScroll = document.body.scrollTop;

		xScroll = document.body.scrollLeft;	

	}

	arrayPageScroll = new Array(xScroll,yScroll) 

	return arrayPageScroll;

}

// -----------------------------------------------------------------------------------

// getPageSize()

function getPageSize(){

	var xScroll, yScroll;

	if (window.innerHeight && window.scrollMaxY) {	

		xScroll = window.innerWidth + window.scrollMaxX;

		yScroll = window.innerHeight + window.scrollMaxY;

	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac

		xScroll = document.body.scrollWidth;

		yScroll = document.body.scrollHeight;

	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari

		xScroll = document.body.offsetWidth;

		yScroll = document.body.offsetHeight;

	}

	var windowWidth, windowHeight;

	if (self.innerHeight) {	// all except Explorer

		if(document.documentElement.clientWidth){

			windowWidth = document.documentElement.clientWidth; 

		} else {

			windowWidth = self.innerWidth;

		}

		windowHeight = self.innerHeight;

	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode

		windowWidth = document.documentElement.clientWidth;

		windowHeight = document.documentElement.clientHeight;

	} else if (document.body) { // other Explorers

		windowWidth = document.body.clientWidth;

		windowHeight = document.body.clientHeight;

	}

	// for small pages with total height less then height of the viewport

	if(yScroll < windowHeight){

		pageHeight = windowHeight;

	} else { 

		pageHeight = yScroll;

	}

	// for small pages with total width less then width of the viewport

	if(xScroll < windowWidth){	

		pageWidth = xScroll;		

	} else {

		pageWidth = windowWidth;

	}

	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 

	return arrayPageSize;

}

// -----------------------------------------------------------------------------------

// getKey(key)

function getKey(e){

	if (e == null) { // ie

		keycode = event.keyCode;

	} else { // mozilla

		keycode = e.which;

	}

	key = String.fromCharCode(keycode).toLowerCase();

	if(key == 'x'){

	}

}

// -----------------------------------------------------------------------------------

// listenKey()

function listenKey () {	document.onkeypress = getKey; }

// ---------------------------------------------------

function showSelectBoxes(){

	var selects = document.getElementsByTagName("select");

	for (i = 0; i != selects.length; i++) {

		selects[i].style.visibility = "visible";

	}

}

// ---------------------------------------------------

function hideSelectBoxes(){

	var selects = document.getElementsByTagName("select");

	for (i = 0; i != selects.length; i++) {

		selects[i].style.visibility = "hidden";

	}

}

// ---------------------------------------------------

function showFlash(){

	var flashObjects = document.getElementsByTagName("object");

	for (i = 0; i < flashObjects.length; i++) {

		flashObjects[i].style.visibility = "visible";

	}

	var flashEmbeds = document.getElementsByTagName("embed");

	for (i = 0; i < flashEmbeds.length; i++) {

		flashEmbeds[i].style.visibility = "visible";

	}

}

// ---------------------------------------------------

function hideFlash(){

	var flashObjects = document.getElementsByTagName("object");

	for (i = 0; i < flashObjects.length; i++) {

		flashObjects[i].style.visibility = "hidden";

	}

	var flashEmbeds = document.getElementsByTagName("embed");

	for (i = 0; i < flashEmbeds.length; i++) {

		flashEmbeds[i].style.visibility = "hidden";

	}

}

// ---------------------------------------------------

function stimuli_pause(ms){

	var date = new Date();

	curDate = null;

	do{var curDate = new Date();}

	while( curDate - date < ms);

}

// ---------------------------------------------------

function initLightbox() { myLightbox = new Lightbox(); }

Event.observe(window, 'load', initLightbox, false);