// -----------------------------------------------------------------------------------
//
//  AjaxBlogGallery based on
// TODO show different image size
//
//	Lightbox v2.03.3
//	by Lokesh Dhakar - http://www.huddletogether.com
//	5/21/06
//
//	For more information on this script, visit:
//	http://huddletogether.com/projects/lightbox2/
//
//	Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
//	
//	Credit also due to those who have helped, inspired, and made their code available to the public.
//	Including: Scott Upton(uptonic.com), Peter-Paul Koch(quirksmode.com), Thomas Fuchs(mir.aculo.us), and others.
//
//
// -----------------------------------------------------------------------------------
/*

	Table of Contents
	-----------------
	Configuration
	Global Variables

	Extending Built-in Objects	
	- Object.extend(Element)
	- Array.prototype.removeDuplicates()
	- Array.prototype.empty()

	Lightbox Class Declaration
	- initialize()
	- updateImageList()
	- start()
	- changeImage()
	- resizeImageContainer()
	- showImage()
	- updateDetails()
	- updateNav()
	- enableKeyboardNav()
	- disableKeyboardNav()
	- keyboardAction()
	- preloadNeighborImages()
	- end()
	
	Miscellaneous Functions
	- getPageScroll()
	- getPageSize()
	- getKey()
	- listenKey()
	- showSelectBoxes()
	- hideSelectBoxes()
	- showFlash()
	- hideFlash()
	- pause()
	- initLightbox()
	
	Function Calls
	- addLoadEvent(initLightbox)
	
*/
// -----------------------------------------------------------------------------------

//
//	Configuration
//
var fileLoadingImage = "portlets/blog/plugins/ajaxbloggallery/images/loading.gif";		
var fileBottomNavCloseImage = "portlets/blog/plugins/ajaxbloggallery/images/closelabel.gif";

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

var animate = true;			// toggles resizing animations
var resizeSpeed = 7;		// 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

var imageWindowSpaceWidth = 300; // if a picture needs to be resized to fit in the window how much space from the window width should substracted
var imageWindowSpaceHeight = 100; // if a picture needs to be resized to fit in the window how much space from the window height should substracted

var tgAdditions = [ "_small", "_thumb", "_large", "_square" ]; // possible thumbnail generation additions
var previewsPath = "previews"; // path to the picture thumbnails

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

//
//	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 added by SU, Couloir
//	- further additions by Lokesh Dhakar (huddletogether.com)
//
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;
	}
});

var MyUtils = {
	getThisAttribute: function (script, attribute) {
		if (attribute == "class") attribute = "className";
		if (attribute == "for") attribute = "htmlFor";
		return this[attribute];
	},
	setThisAttribute: function (script, attribute, value) {
		if (attribute == "class") attribute = "className";
		if (attribute == "for") attribute = "htmlFor";
		this[attribute] = value;
	}
}

Element.addMethods(MyUtils);

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

//
//	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.sizeof = function () {
    elements = 0;
    // really bad!
	for ( var key in this ) { if (key === "each") { break; } elements = elements + 1; }
	return elements;	
}

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

Array.prototype.empty = function () {
	for(i = 0; i <= this.length; i++){
		this.shift();
	}
}

var current = 0;
var mainanchors = new Array();
var prevanchor = new Array();
var nextanchor = new Array();
var picturesperpage = 4;
var gallery = "main";

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

//
//	Lightbox Class Declaration
//	- initialize()
//	- start()
//	- changeImage()
//	- resizeImageContainer()
//	- showImage()
//	- updateDetails()
//	- updateNav()
//	- enableKeyboardNav()
//	- disableKeyboardNav()
//	- keyboardNavAction()
//	- preloadNeighborImages()
//	- end()
//
//	Structuring of code inspired by Scott Upton (http://www.uptonic.com/)
//
var Lightbox = Class.create();

Lightbox.prototype = {
        
	//qualify an HREF to form a complete URI
	qualifyHREF:function(href)
	{
        //get the current document location object
        var loc = document.location;

        //build a base URI from the protocol plus host (which includes port if applicable)
        var uri = loc.protocol + '//' + loc.host;
        
        //if the input path is relative-from-here
        //just delete the ./ token to make it relative
        if(/^(\.\/)([^\/]?)/.test(href))
        {
                href = href.replace(/^(\.\/)([^\/]?)/, '$2');
        }

        //if the input href is already qualified, copy it unchanged
        if(/^([a-z]+)\:\/\//.test(href))
        {
                uri = href;
        }

        //or if the input href begins with a leading slash, then it's base relative
        //so just add the input href to the base URI
        else if(href.substr(0, 1) == '/')
        {
                uri += href;
        }

        //or if it's an up-reference we need to compute the path
        else if(/^((\.\.\/)+)([^\/].*$)/.test(href))
        {
                //get the last part of the path, minus up-references
                var lastpath = href.match(/^((\.\.\/)+)([^\/].*$)/);
                lastpath = lastpath[lastpath.length - 1];
                
                //count the number of up-references
                var references = href.split('../').length - 1;
                
                //get the path parts and delete the last one (this page or directory)
                var parts = loc.pathname.split('/');
                parts = parts.splice(0, parts.length - 1);
                
                //for each of the up-references, delete the last part of the path
                for(var i=0; i<references; i++)
                {
                        parts = parts.splice(0, parts.length - 1);
                }

                //now rebuild the path
                var path = '';
                for(i=0; i<parts.length; i++)
                {
                        if(parts[i] != '')
                        {
                                path += '/' + parts[i];
                        }
                }
                path += '/';

                //and add the last part of the path
                path += lastpath;
                
                //then add the path and input href to the base URI
                uri += path;
        }

        //otherwise it's a relative path,
        else
        {
                //calculate the path to this directory
                path = '';
                parts = loc.pathname.split('/');
                parts = parts.splice(0, parts.length - 1);
                for(var i=0; i<parts.length; i++)
                {
                        if(parts[i] != '')
                        {
                                path += '/' + parts[i];
                        }
                }
                path += '/';

                //then add the path and input href to the base URI
                uri += path + href;
        }
                
        var testuri = "";
        var elements = uri.split('/');
        for (var i = 0; i < elements.length; i++) {
        	if (elements[i] == "..") {
        		// skip this element and delete element before
        		testuri = testuri.substring(0, (testuri.substring(0, testuri.length - 1)).lastIndexOf("/") + 1);
        	} else if (i < elements.length - 1) {
        		testuri += elements[i] + "/";
        	} else {
        		testuri += elements[i];
        	}
        }
        
        uri = testuri;
        
        //return the final uri
        return uri;
	},
	
	// because of thumbnails the picture names can be different in byte-by-byte comparison
	// this function solves that
	comparePictureLocation: function(str1, str2) {
		var firstPicture = this.qualifyHREF(str1);
		var secondPicture = this.qualifyHREF(str2);
		
		// the picture have the same locations, so return
		if (firstPicture === secondPicture) {
			return true;
		}
		
		// cut off the extension and remove possible thumbnail generation additions
		var firstTemp = firstPicture.substring(0, firstPicture.lastIndexOf("."));
		var secondTemp = secondPicture.substring(0, secondPicture.lastIndexOf("."));
		
		for (var i = 0; i < tgAdditions.length; i++) {
			if (firstTemp.endsWith(tgAdditions[i])) {
				firstTemp = firstTemp.substring(0, firstTemp.length-tgAdditions[i].length);
			}
			if (secondTemp.endsWith(tgAdditions[i])) {
				secondTemp = secondTemp.substring(0, secondTemp.length - tgAdditions[i].length);
			}
		}
		
		// check for the "previews" path and remove it
		if (firstTemp.indexOf("/" + previewsPath + "/") > -1) {
			firstTemp = firstTemp.substring(0, firstTemp.indexOf(previewsPath)) + firstTemp.substring(firstTemp.indexOf(previewsPath)+previewsPath.length+1);
		}
		if (secondTemp.indexOf("/" + previewsPath + "/") > -1) {
			secondTemp = secondTemp.substring(0, secondTemp.indexOf(previewsPath)) + secondTemp.substring(secondTemp.indexOf(previewsPath)+previewsPath.length+1);
		}
		
		// alert("firstPicture = " + firstPicture + ", firstTemp = " + firstTemp + ", secondPicture = " + secondPicture + ", secondTemp = " + secondTemp);
		
		return (firstTemp === secondTemp);
	
	},
		
	// 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() {	
	
		// alert("called ajaxbloggallery initialize!");
	
		if (!document.getElementsByTagName){ return; }
		var anchors = document.getElementsByTagName('a');
		var areas = document.getElementsByTagName('area');
		
		var place = new Array();
		
		// loop through all anchor tags
		for (var i=0; i<anchors.length; i++){
			var anchor = anchors[i];
			
			var relAttribute = String(anchor.getAttribute('rel'));
			
			gallery = "main";
			place[gallery] = 0;
			
			// use the string.match() method to catch 'lightbox' references in the rel attribute
			if (anchor.getAttribute('href') && (relAttribute.toLowerCase().match('lightbox'))){
				// extract gallery
				if ((relAttribute.charAt(('lightbox'.length)) == '[') && (relAttribute.charAt((relAttribute.length)-1) == ']')) {
					gallery = relAttribute.substring('lightbox'.length+1, relAttribute.length-1);
				}
				
				if (!place[gallery]) {
					place[gallery] = 0;
				}

				anchor.setAttribute("gallery", gallery);
				anchor.onclick = function () {myLightbox.start(this); return false;}

				if (!mainanchors[gallery]) {
					mainanchors[gallery] = new Array();
				}
				mainanchors[gallery][place[gallery]] = anchor;
				
				place[gallery] = place[gallery] + 1;
			}

			if (relAttribute.toLowerCase().match('ajaxbloggallery_next')) {
				// extract gallery
				if ((relAttribute.charAt(('ajaxbloggallery_next').length) == '[') && (relAttribute.charAt((relAttribute.length)-1) == ']')) {
					gallery = relAttribute.substring('ajaxbloggallery_next'.length+1, relAttribute.length-1);
				}
				
				anchor.setAttribute("gallery", gallery);
				anchor.onclick = function () {myLightbox.next(this); return false;}
				nextanchor[gallery] = anchor;
			}

			if (relAttribute.toLowerCase().match('ajaxbloggallery_prev')) {
				// extract gallery
				if ((relAttribute.charAt(('ajaxbloggallery_prev').length) == '[') && (relAttribute.charAt((relAttribute.length)-1) == ']')) {
					gallery = relAttribute.substring('ajaxbloggallery_prev'.length+1, relAttribute.length-1);
				}
				
				anchor.setAttribute("gallery", gallery);
				anchor.onclick = function () {myLightbox.prev(this); return false;}
				prevanchor[gallery] = anchor;
			}
		}
		
		// only use the images for displaying which are really shown on the page, even if the pictureperpage setting is higher
		// TODO
		// if (picturesperpage > place) {
		// 	picturesperpage = place;
		// }

		// 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;}
			}

			if (area.getAttribute('href') && (relAttribute.toLowerCase().match('ajaxbloggallery_next'))){
				area.onclick = function () {myLightbox.next(this); return false;}
			}

			if (area.getAttribute('href') && (relAttribute.toLowerCase().match('ajaxbloggallery_prev'))){
				area.onclick = function () {myLightbox.prev(this); return false;}
			}
		}
		
		// lightbox code
		
        var objBody = document.getElementsByTagName("body").item(0);
		
		var objOverlay = document.createElement("div");
		objOverlay.setAttribute('id','overlay');
		objOverlay.style.display = 'none';
		objOverlay.onclick = function() { myLightbox.end(); }
		objBody.appendChild(objOverlay);
		
		var objLightbox = document.createElement("div");
		objLightbox.setAttribute('id','lightbox');
		objLightbox.style.display = 'none';
		objLightbox.onclick = function(e) {	// close Lightbox is user clicks shadow overlay
			if (!e) var e = window.event;
			var clickObj = Event.element(e).id;
			if ( clickObj == 'lightbox') {
				myLightbox.end();
			}
		};
		objBody.appendChild(objLightbox);
			
		var objOuterImageContainer = document.createElement("div");
		objOuterImageContainer.setAttribute('id','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('outerImageContainer', 250);
			Element.setHeight('outerImageContainer', 250);			
		} else {
			Element.setWidth('outerImageContainer', 1);
			Element.setHeight('outerImageContainer', 1);			
		}

		var objImageContainer = document.createElement("div");
		objImageContainer.setAttribute('id','imageContainer');
		objOuterImageContainer.appendChild(objImageContainer);
	
		var objLightboxImage = document.createElement("img");
		objLightboxImage.setAttribute('id','lightboxImage');
		objImageContainer.appendChild(objLightboxImage);
	
		var objHoverNav = document.createElement("div");
		objHoverNav.setAttribute('id','hoverNav');
		objImageContainer.appendChild(objHoverNav);
	
		var objPrevLink = document.createElement("a");
		objPrevLink.setAttribute('id','prevLink');
		objPrevLink.setAttribute('href','#');
		objHoverNav.appendChild(objPrevLink);
		
		var objNextLink = document.createElement("a");
		objNextLink.setAttribute('id','nextLink');
		objNextLink.setAttribute('href','#');
		objHoverNav.appendChild(objNextLink);
	
		var objLoading = document.createElement("div");
		objLoading.setAttribute('id','loading');
		objImageContainer.appendChild(objLoading);
	
		var objLoadingLink = document.createElement("a");
		objLoadingLink.setAttribute('id','loadingLink');
		objLoadingLink.setAttribute('href','#');
		objLoadingLink.onclick = function() { myLightbox.end(); return false; }
		objLoading.appendChild(objLoadingLink);
	
		var objLoadingImage = document.createElement("img");
		objLoadingImage.setAttribute('src', fileLoadingImage);
		objLoadingLink.appendChild(objLoadingImage);

		var objImageDataContainer = document.createElement("div");
		objImageDataContainer.setAttribute('id','imageDataContainer');
		objLightbox.appendChild(objImageDataContainer);

		var objImageData = document.createElement("div");
		objImageData.setAttribute('id','imageData');
		objImageDataContainer.appendChild(objImageData);
	
		var objImageDetails = document.createElement("div");
		objImageDetails.setAttribute('id','imageDetails');
		objImageData.appendChild(objImageDetails);
	
		var objCaption = document.createElement("span");
		objCaption.setAttribute('id','caption');
		objImageDetails.appendChild(objCaption);
	
		var objNumberDisplay = document.createElement("span");
		objNumberDisplay.setAttribute('id','numberDisplay');
		objImageDetails.appendChild(objNumberDisplay);
		
		var objBottomNav = document.createElement("div");
		objBottomNav.setAttribute('id','bottomNav');
		objImageData.appendChild(objBottomNav);
	
		var objBottomNavCloseLink = document.createElement("a");
		objBottomNavCloseLink.setAttribute('id','bottomNavClose');
		objBottomNavCloseLink.setAttribute('href','#');
		objBottomNavCloseLink.onclick = function() { myLightbox.end(); return false; }
		objBottomNav.appendChild(objBottomNavCloseLink);
	
		var objBottomNavCloseImage = document.createElement("img");
		objBottomNavCloseImage.setAttribute('src', fileBottomNavCloseImage);
		objBottomNavCloseLink.appendChild(objBottomNavCloseImage);

	},

	//
	//	start()
	//	Display overlay and lightbox. If image is part of a set, add siblings to imageArray.
	//
	start: function(el) {	
	
		hideSelectBoxes();
		hideFlash();
		
        var gallery = el.getAttribute("gallery");
		var imageLink = el.firstChild.src;

		// stretch overlay to fill page and fade in
		var arrayPageSize = getPageSize();
		Element.setWidth('overlay', arrayPageSize[0]);
		Element.setHeight('overlay', arrayPageSize[1]);

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

		imageArray = [];
		imageNum = 0;		

		if (!document.getElementsByTagName){ return; }
		
		/*
		var anchors = document.getElementsByTagName( imageLink.tagName);

		// if image is NOT part of a set..
		if((imageLink.getAttribute('rel') == 'ajaxbloggallery')){
			// add single image to imageArray
			imageArray.push(new Array(imageLink.getAttribute('href'), imageLink.getAttribute('title')));			
		} else {

		// if image is part of a set..

			// 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'))){
					imageArray.push(new Array(anchor.getAttribute('href'), anchor.getAttribute('title')));
				}
			}
			imageArray.removeDuplicates();
			while(imageArray[imageNum][0] != imageLink.getAttribute('href')) { imageNum++;}
		}
		*/
		
		// loop through images, find other images in set, and add them to imageArray
		for (var i=0; i<images[gallery].length; i++){
			// first element is the picture, second element is the link, third element is the title
			imageArray.push(new Array(images[gallery][i][0], images[gallery][i][2]));
		}
		imageArray.removeDuplicates();
		// TODO absolute path
		while((imageNum < imageArray.length) && !(this.comparePictureLocation(String(imageLink), String(imageArray[imageNum][0])))) { imageNum++; }
		if (imageNum == imageArray.length) {
			// image not found, so take the last as workaround
			imageNum = imageArray.length - 1;
			alert("Could not find correct image, will now display the last in this set!");
		}

		// calculate top and left offset for the lightbox 
		var arrayPageScroll = getPageScroll();
		var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 10);
		var lightboxLeft = arrayPageScroll[0];
		Element.setTop('lightbox', lightboxTop);
		Element.setLeft('lightbox', lightboxLeft);

		Element.show('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('loading');}
        Element.hide('lightboxImage');
		Element.hide('hoverNav');
		Element.hide('prevLink');
		Element.hide('nextLink');
		Element.hide('imageDataContainer');
		Element.hide('numberDisplay');		
		
		imgPreloader = new Image();
		
		// once image is preloaded, resize image container
		imgPreloader.onload=function(){
			Element.setSrc('lightboxImage', imageArray[activeImage][0]);
			// myLightbox.resizeImageContainer(imgPreloader.width, imgPreloader.height);
			// var arrayPageSize = getPageSize();

			// limit the size to the window
			var arrayWindowSize = getWindowSize();
			
			// resize it because of the lightbox.top value
			arrayWindowSize[1] -= arrayWindowSize[1] / 10;
			 
			wid = imgPreloader.width > arrayWindowSize[0] ? arrayWindowSize[0] - imageWindowSpaceWidth : imgPreloader.width;
			hei = imgPreloader.height > arrayWindowSize [1] ? arrayWindowSize[1] - imageWindowSpaceHeight : imgPreloader.height;
			
			// keep aspect ratio
			if (imgPreloader.width > wid && imgPreloader.height > hei) {
				// check relation, if wid/height > img.wid / img.height change the height else change the width
				if (imgPreloader.width > imgPreloader.height) {
					hei = (imgPreloader.height/imgPreloader.width) * wid;
				} else {
					wid = (imgPreloader.width/imgPreloader.height) * hei;
				}
			} else {
				if (imgPreloader.width > wid) {
					// img.setWidth is correctly set to wid
					hei = (imgPreloader.height/imgPreloader.width) * wid;
				} else if (imgPreloader.height > hei) {
					// img.setHeight is correctly set to hei
					wid = (imgPreloader.width/imgPreloader.height) * hei;
				}
			}
			
			Element.setWidth('lightboxImage', wid);
			Element.setHeight('lightboxImage', hei);
			myLightbox.resizeImageContainer(wid, hei);
			
			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('outerImageContainer');
		this.heightCurrent = Element.getHeight('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('outerImageContainer', this.yScale, {scaleX: false, duration: resizeDuration, queue: 'front'}); }
		if(!( wDiff == 0)){ new Effect.Scale('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 pause to prevent image flicker.
		if((hDiff == 0) && (wDiff == 0)){
			if (navigator.appVersion.indexOf("MSIE")!=-1){ pause(250); } else { pause(100);} 
		}
		
		Element.setHeight('prevLink', imgHeight);
		Element.setHeight('nextLink', imgHeight);
		Element.setWidth( 'imageDataContainer', widthNew);

		this.showImage();
	},
	
	//
	//	showImage()
	//	Display image and begin preloading neighbors.
	//
	showImage: function(){
		Element.hide('loading');
		new Effect.Appear('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('caption');
			Element.setInnerHTML( 'caption', imageArray[activeImage][1]);
		}
		
		// if image is part of set display 'Image x of x' 
		if(imageArray.length > 1){
			Element.show('numberDisplay');
			Element.setInnerHTML( 'numberDisplay', "Image " + eval(activeImage + 1) + " of " + imageArray.length);
		}

		new Effect.Parallel(
			[ new Effect.SlideDown( 'imageDataContainer', { sync: true, duration: resizeDuration, from: 0.0, to: 1.0 }), 
			  new Effect.Appear('imageDataContainer', { sync: true, duration: resizeDuration }) ], 
			{ duration: resizeDuration, afterFinish: function() {
				// update overlay size and update nav
				var arrayPageSize = getPageSize();
				Element.setHeight('overlay', arrayPageSize[1]);
				myLightbox.updateNav();
				}
			} 
		);
	},

	//
	//	updateNav()
	//	Display appropriate previous and next hover navigation.
	//
	updateNav: function() {

		Element.show('hoverNav');				

		// if not first image in set, display prev image button
		if(activeImage != 0){
			Element.show('prevLink');
			document.getElementById('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('nextLink');
			document.getElementById('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('lightbox');
		new Effect.Fade('overlay', { duration: overlayDuration});
		showSelectBoxes();
		showFlash();
	},
	
	updatePictureList: function(gallery) {
	    var place = 0;
	    var i = 0;
		// replace the pictures
		for (i = current; (i < current+picturesperpage && i < images[gallery].length); i++) {
			// set the corresponding image to the field
			mainanchors[gallery][place].href = images[gallery][i][0];
			mainanchors[gallery][place].firstChild.src = images[gallery][i][1];
			place = place + 1;
		}
		
		if (i >= images[gallery].length) {

			// disable next button
			var href = nextanchor[gallery].getAttribute("href");
			$(nextanchor[gallery]).setAttribute('href_bak', href);
			nextanchor[gallery].removeAttribute('href');
			
			$(nextanchor[gallery]).onclick = function () { void(0); }
    		$(nextanchor[gallery]).onmouseout = function () { this.style.color = ""; this.style.textDecoration = ""; this.style.fontWeight = ""; }
    		$(nextanchor[gallery]).onmouseover = function () { this.style.color = deactivatedColor; this.style.textDecoration = "none"; this.style.fontWeight = "normal"; }
		} else if (!(nextanchor[gallery].href)) {
			if ($(nextanchor[gallery]).getAttribute('href_bak') && ($(nextanchor[gallery]).getAttribute('href_bak') != "")) {
				$(nextanchor[gallery]).setAttribute('href', $(nextanchor[gallery]).getAttribute('href_bak'));
			} else {
				$(nextanchor[gallery]).setAttribute('href', "#");
			}
			$(nextanchor[gallery]).onclick = function () {myLightbox.next(this); return false;}
    		$(nextanchor[gallery]).onmouseout = null;
    		$(nextanchor[gallery]).onmouseover = null;
		}
		
		if (current == 0) {
			// disable prev button
			var href = prevanchor[gallery].getAttribute("href");
			// prevanchor[gallery].setAttribute('href_bak', href);
			$(prevanchor[gallery]).setAttribute('href_bak', href);
			prevanchor[gallery].removeAttribute('href');
			
			prevanchor[gallery].onclick = function () { void(0); }
    		prevanchor[gallery].onmouseout = function () { this.style.color = ""; this.style.textDecoration = ""; this.style.fontWeight = ""; }
    		prevanchor[gallery].onmouseover = function () { this.style.color = deactivatedColor; this.style.textDecoration = "none"; this.style.fontWeight = "normal"; }
		} else if (!(prevanchor[gallery].href)) {
			if ($(prevanchor[gallery]).getAttribute('href_bak') && ($(prevanchor[gallery]).getAttribute('href_bak') != "")) {
				prevanchor[gallery].href = $(prevanchor[gallery]).getAttribute('href_bak');
			} else {
				// set an default value
				prevanchor[gallery].href = "#";
			}
			
			$(prevanchor[gallery]).onclick = function () {myLightbox.prev(this); return false;}
    		$(prevanchor[gallery]).onmouseout = null;
    		$(prevanchor[gallery]).onmouseover = null;
		}

	},
    
    next: function(nextLink) {
        var gallery = nextLink.getAttribute("gallery");
		if (current+(2*picturesperpage) <= images[gallery].length) {
		    current = current+picturesperpage;
		} else {
			current = images[gallery].length-picturesperpage;
		}
		
		this.updatePictureList(nextLink.getAttribute("gallery"));
	},

	prev: function(prevLink) {	
		if (current-picturesperpage > 0) {
		    current = current-picturesperpage;
		} else {
			current = 0;
		}
		
		this.updatePictureList(prevLink.getAttribute("gallery"));
	}
	
}

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

//
// getPageScroll()
// Returns array with x,y page scroll values.
// Core code from - quirksmode.com
//
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;
}

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

function getWindowSize() {
	var windowWidth, windowHeight;
	
//	console.log(self.innerWidth);
//	console.log(document.documentElement.clientWidth);

	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;
	}	
	
	return new Array(windowWidth, windowHeight);
}

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

//
// getPageSize()
// Returns array with page width, height and window width, height
// Core code from - quirksmode.com
// Edit for Firefox by pHaez
//
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;
	
//	console.log(self.innerWidth);
//	console.log(document.documentElement.clientWidth);

	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;
	}

//	console.log("xScroll " + xScroll)
//	console.log("windowWidth " + windowWidth)

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = xScroll;		
	} else {
		pageWidth = windowWidth;
	}
//	console.log("pageWidth " + pageWidth)

	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}

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

//
// getKey(key)
// Gets keycode. If 'x' is pressed then it hides the lightbox.
//
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";
	}

}


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

//
// pause(numberMillis)
// Pauses code execution for specified time. Uses busy code, not good.
// Help from Ran Bar-On [ran2103@gmail.com]
//

function pause(ms){
	var date = new Date();
	curDate = null;
	do{var curDate = new Date();}
	while( curDate - date < ms);
}
/*
function pause(numberMillis) {
	var curently = new Date().getTime() + sender;
	while (new Date().getTime();	
}
*/
// ---------------------------------------------------


function initLightbox() { myLightbox = new Lightbox(); }
Event.observe(window, 'load', initLightbox, false);