// -----------------------------------------------------------------------------------
//
//    Lightbox v2.04
//    by Lokesh Dhakar - http://www.lokeshdhakar.com
//    Last Modification: 2/9/08
//
//    For more information, visit:
//    http://lokeshdhakar.com/projects/lightbox2/
//
//    Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
//      - Free for use in both personal and commercial projects
//        - Attribution requires leaving author name, author link, and the license info intact.
//    
//  Thanks: Scott Upton(uptonic.com), Peter-Paul Koch(quirksmode.com), and Thomas Fuchs(mir.aculo.us) for ideas, libs, and snippets.
//          Artemy Tregubenko (arty.name) for cleanup and help in updating to latest ver of proto-aculous.
//
// -----------------------------------------------------------------------------------
// Modifications by Jon Tyson
// Modifications Copyright (c) 2008


/*

    Table of Contents
    -----------------
    Configuration

    Lightbox Class Declaration
    - initialize()
    - updateImageList()
    - start()
    - changeImage()
    - resizeImageContainer()
    - showImage()
    - updateDetails()
    - updateNav()
    - enableKeyboardNav()
    - disableKeyboardNav()
    - keyboardAction()
    - preloadNeighborImages()
    - end()
    
    Function Calls
    - document.observe()
   
*/
// -----------------------------------------------------------------------------------

//
//  Configurationl
//
LightboxOptions = Object.extend({
    fileLoadingImage:        '/IVG2/Templates/Images/Loading.gif',     
    fileBottomNavCloseImage: '/IVG2/Templates/Images/CloseLabel.gif',

    overlayOpacity: 0.4,    // controls transparency of shadow overlay
    animate: true,          // toggles resizing animations
    closeOnMouseOut: false, // controls behavior on mouseout events
    resizeSpeed: 10,        // controls the speed of the image resizing animations (1=slowest and 10=fastest)
    borderSize: 10,         //if you adjust the padding in the CSS, you will need to update this variable

    labelImage: 'Image',    // When grouping images this is used to write: Image # of #.
    labelOf: 'of',          // Change it for non-english localization
    
    specialGroup: 'products',                   // If a lightbox anchor is a member of the 'specialGroup' set, then 
    specialGroupParam: 'slb=product$first'      // the specialGroupParam is appended to the click-through URL, if any
}, window.LightboxOptions || {});

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

var bInitialized  = 0;
var LightboxTimer = 0;
var myLightbox;

function initLightbox() 
{
    if (bInitialized == 0)
    {
        bInitialized = 1;   
        myLightbox = new Lightbox(); 
    }
}

function setFirstPrevLastNext(FirstPrev, LastNext)
{
    if (bInitialized == 0)
        initLightbox();
    if (myLightbox == null)
        return;
    
    myLightbox.firstPrev = FirstPrev;
    myLightbox.lastNext = LastNext;
}

function startLightboxTimer(imageLink, magImage)
{
    if (LightboxTimer == 0)
        LightboxTimer = window.setTimeout("startLightbox(document.getElementById('" 
            + imageLink.id + "'), document.getElementById('" + magImage.id + "'));", 250);
}

function stopLightboxTimer()
{
    if (LightboxTimer != 0)
    {
        window.clearTimeout(LightboxTimer);
        LightboxTimer = 0;
    }
}

function startLightbox(imageLink, magImage)
{
    if (magImage != null && magImage != '')
        magImage.style.display = "none";
    if (myLightbox != null)
        myLightbox.start(imageLink); 
}

function startLightboxSet(setName, index)
{
    if (myLightbox != null)
        window.setTimeout("myLightbox.startSet('" + setName + "', '" + index + "');", 250); 
}

function showMagnifier(magImage)
{ magImage.style.left = "55px"; magImage.style.display = "inline"; magImage.style.clear = "both"; magImage.style.position = "absolute"; }

function showMagnifierNew(magImage, sLeftPos)
{ magImage.style.left = sLeftPos; magImage.style.display = "inline"; magImage.style.clear = "both"; magImage.style.position = "absolute";}

function showMagnifierFeaturedProduct(magImage, sLeftPos)
{ magImage.style.left = sLeftPos; magImage.style.display = "inline";  magImage.style.position = "absolute"; }

function hideMagnifier(magImage)
{ magImage.style.display = "none"; }

var Lightbox = Class.create();

Lightbox.prototype = {
    imageArray: [],
    activeImage: undefined,
    lastStart: undefined,
    readyForMouseout: undefined,
    
    // 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();
        
        this.keyboardAction = this.keyboardAction.bindAsEventListener(this);

        if (LightboxOptions.resizeSpeed > 10) LightboxOptions.resizeSpeed = 10;
        if (LightboxOptions.resizeSpeed < 1)  LightboxOptions.resizeSpeed = 1;

        this.resizeDuration = LightboxOptions.animate ? ((11 - LightboxOptions.resizeSpeed) * 0.15) : 0;
        this.overlayDuration = LightboxOptions.animate ? 0.2 : 0;  // shadow fade in/out duration

        // 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.
        var size = (LightboxOptions.animate ? 250 : 1) + 'px';
        

        // Code inserts html at the bottom of the page that looks similar to this:
        //
        //  <div id="overlay"></div>
        //  <div id="lightbox">
        //      <div id="outerImageContainer">
        //          <div id="imageContainer">
        //              <a href="#" id="imageContainerLink">
        //                  <img id="lightboxImage">
        //                  <div style="" id="hoverNav">
        //                      <a href="#" id="prevLink"></a>
        //                      <a href="#" id="nextLink"></a>
        //                  </div>
        //                  <div id="loading">
        //                      <a href="#" id="loadingLink">
        //                          <img src="/IVG2/Templates/Images/Loading.gif">
        //                      </a>
        //                  </div>
        //              </a>
        //          </div>
        //      </div>
        //      <div id="imageDataContainer">
        //          <div id="imageData">
        //              <div id="imageDetails">
        //                  <span id="caption"></span>
        //                  <span id="numberDisplay"></span>
        //              </div>
        //              <div id="bottomNav">
        //                  <a href="#" id="bottomNavClose">
        //                      <img src="/IVG2/Templates/Images/Close.gif">
        //                  </a>
        //              </div>
        //          </div>
        //      </div>
        //  </div>


        var objBody = $$('body')[0];

        objBody.appendChild(Builder.node('div',{id:'overlay'}));
    
        objBody.appendChild(Builder.node('div',{id:'lightbox'}, [
            Builder.node('div',{id:'outerImageContainer'}, 
                Builder.node('div',{id:'imageContainer'}, [
                    Builder.node('a',{id:'imageContainerLink', href: '#' }, [
                        Builder.node('img',{id:'lightboxImage'}), 
                        Builder.node('div',{id:'hoverNav'}, [
                            Builder.node('a',{id:'prevLink', href: '#' ,title:'Prev' }),
                            Builder.node('a',{id:'nextLink', href: '#' ,title:'Next'})
                        ]),
                        Builder.node('div',{id:'loading'}, 
                            Builder.node('a',{id:'loadingLink', href: '#' }, 
                                Builder.node('img', {src: LightboxOptions.fileLoadingImage})
                            )
                        )
                    ])
                ])
            ),
            Builder.node('div', {id:'imageDataContainer'},
                Builder.node('div',{id:'imageData'}, [
                    Builder.node('div',{id:'imageDetails'}, [
                        Builder.node('span',{id:'caption'}),
                        Builder.node('span',{id:'numberDisplay'})
                    ]),
                    Builder.node('div',{id:'bottomNav'},
                        Builder.node('a',{id:'bottomNavClose', href: '#' },
                            Builder.node('img', { src: LightboxOptions.fileBottomNavCloseImage })
                        )
                    )
                ])
            )
        ]));

        $('overlay').hide().observe('click', (function() { this.end(); }).bind(this));
        $('lightbox').hide().observe('click', (function(event) { if (event.element().id == 'lightbox') this.end(); }).bind(this));
        $('outerImageContainer').setStyle({ width: size, height: size });
        $('prevLink').observe('click', (function(event) { event.stop(); this.changeImage(this.activeImage - 1); }).bindAsEventListener(this));
        $('nextLink').observe('click', (function(event) { event.stop(); this.changeImage(this.activeImage + 1); }).bindAsEventListener(this));
        $('loadingLink').observe('click', (function(event) { event.stop(); this.end(); }).bind(this));
        $('bottomNavClose').observe('click', (function(event) { event.stop(); this.end(); }).bind(this));

        $('outerImageContainer').observe('mouseout', (function(event) { event.stop(); this.mouseout(event); }).bindAsEventListener(this));
        $('imageContainer').observe('mouseout', (function(event) { event.stop(); this.mouseout(event); }).bindAsEventListener(this));
        $('lightboxImage').observe('mouseout', (function(event) { event.stop(); this.mouseout(event); }).bindAsEventListener(this));
        $('hoverNav').observe('mouseout', (function(event) { event.stop(); this.mouseout(event); }).bindAsEventListener(this));
        $('prevLink').observe('mouseout', (function(event) { event.stop(); this.mouseout(event); }).bindAsEventListener(this));
        $('nextLink').observe('mouseout', (function(event) { event.stop(); this.mouseout(event); }).bindAsEventListener(this));
        
        var th = this;
        (function(){
            var ids = 
                'overlay lightbox outerImageContainer imageContainer lightboxImage hoverNav prevLink nextLink loading loadingLink ' + 
                'imageDataContainer imageData imageDetails caption numberDisplay bottomNav bottomNavClose';   
            $w(ids).each(function(id){ th[id] = $(id); });
        }).defer();
    },

    // 
    // mouseout()
    // Handles mouse moves off the image, and closes things down
    // 
    mouseout: function(event) {
        if (this.readyForMouseout != true || !LightboxOptions.closeOnMouseOut)
            return;
    
        var id = null;
        if (event.toElement != null)
            id  = event.toElement.id;
        else if (event.explicitOriginalTarget != null)
            id = event.explicitOriginalTarget.id;
            
        if (id != 'outerImageContainer' &&
            id != 'imageContainer' &&
            id != 'lightboxImage' &&
            id != 'hoverNav' &&
            id != 'prevLink' &&
            id != 'nextLink' &&
            id != 'imageDetails' &&
            id != 'imageDataContainer')
            {  this.end(); }
    },


    //
    // 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() {   
        this.updateImageList = Prototype.emptyFunction;

        document.observe('click', (function(event){
            var target = event.findElement('a[rev^=lightboxclick]') ;
            if (target) {
                event.stop();
                this.start(target);
            }
        }).bind(this));
    },
    
    //
    //  start()
    //  Display overlay and lightbox. If image is part of a set, add siblings to imageArray.
    //
    start: function(imageLink) {    

        this.startWorker();

        this.imageArray = [];
        var imageArray = this.imageArray;
        var imageNum = 0;

        if ((imageLink.rev == 'lightbox' || imageLink.rev == 'lightboxclick')){
            // if image is NOT part of a set, add single image to imageArray
            imageArray.push([imageLink.href, imageLink.title, imageLink.href]);         
        } 
        else if (imageLink.rev.substr(0, 8) == 'lightbox')
        {
            var revElements = imageLink.rev.split('$'); // "lightbox"$group$href or "lightboxclick"$group$href
            var sGroup      = revElements[1];
            var sHref       = revElements[2];
        
            $$(imageLink.tagName).each(function(anchor)
            { 
                var revElementsA = anchor.rev.split('$');
                var sGroupA      = revElementsA[1];
                var sHrefA       = revElementsA[2];

                // If the anchor and the image are the same, ignore the anchor                
                var sAnchorHref  = anchor.href;
                if (sAnchorHref.indexOf(sHrefA) != -1)
                    sAnchorHref  = '';
                    
                if (sGroup == sGroupA && sHrefA != '')
                {
                    // Append parameter for launching the lightbox when we navigate to sAnchorHref
                    if (sGroupA == LightboxOptions.specialGroup && sAnchorHref != '')
                    {
                        if (sAnchorHref.indexOf('?') == -1)
                            sAnchorHref = sAnchorHref + '?';
                        else
                            sAnchorHref = sAnchorHref + '&';
                        sAnchorHref = sAnchorHref + LightboxOptions.specialGroupParam;
                    }
                    imageArray.push([sHrefA, anchor.title, sAnchorHref]);
                }
            });
        
            while (imageArray[imageNum][0] != sHref) { imageNum++; }
        }
            
        this.computeAndSetSize(imageLink,imageNum);
        this.changeImage(imageNum);
    },

    //
    //  startSet()
    //  Display overlay and lightbox. If image is part of a set, add siblings to imageArray.
    //  setName is the name of the set to "start", and index is the offset of the set to display
    //      index == -1 -> last image; index == 0 -> first image
    startSet: function(setName, index) {    

        this.imageArray = [];
        var imageArray = this.imageArray;
        var imageNum = 0;
        var imageLink = '';     

        $$('a').each(function(anchor)
        { 
            var revElementsA = anchor.rev.split("$");
            var sGroupA      = revElementsA[1];
            var sHrefA       = revElementsA[2];

            // If the anchor and the image are the same, ignore the anchor                
            var sAnchorHref  = anchor.href;
            if (sAnchorHref.indexOf(sHrefA) != -1)
                sAnchorHref  = "";
                
            if (setName == sGroupA && sHrefA != "")
            {
                // Append parameter for launching the lightbox when we navigate to sAnchorHref
                if (sGroupA == LightboxOptions.specialGroup && sAnchorHref != '')
                {
                    if (sAnchorHref.indexOf('?') == -1)
                        sAnchorHref = sAnchorHref + '?';
                    else
                        sAnchorHref = sAnchorHref + '&';
                    sAnchorHref = sAnchorHref + LightboxOptions.specialGroupParam;
                }
            
                imageArray.push([sHrefA, anchor.title, sAnchorHref]);
                if (index == -1)
                    imageLink = anchor;
                else if (index == imageArray.length - 1)
                    imageLink = anchor;
            }
        });
    
        if (index == 'first')
            imageNum = 0;
        else if ((index == 'last') || (index == -1))
            imageNum = imageArray.length - 1;
        else 
            imageNum = parseInt(index);

        if (imageArray.length == 0)
            return;
            
        this.startWorker();
        
        if (imageLink != '')
            this.computeAndSetSize(imageLink,imageNum);
        this.changeImage(imageNum);
    },
 
    startWorker: function() {
        var CurrentDate = new Date();
        if (this.lastStart == null)
            this.lastStart = CurrentDate;
        else
        {
            if (CurrentDate.getTime() - this.lastStart.getTime() < 2000)
                return;
            this.lastStart = CurrentDate;
        }    

        $$('select', 'object', 'embed').each(function(node){ node.style.visibility = 'hidden' });

        // stretch overlay to fill page and fade in
        var arrayPageSize = this.getPageSize();
        $('overlay').setStyle({ width: arrayPageSize[0] + 'px', height: arrayPageSize[1] + 'px' });

        if (this.overlay != null)
            new Effect.Appear(this.overlay, { duration: this.overlayDuration, from: 0.0, to: LightboxOptions.overlayOpacity });
    },

    ComputeImageResize: function(imageNum){
        var imgLarge = new Image();
        imgLarge.src            = this.imageArray[imageNum][0];
        var imgLargeWidth       = imgLarge.width;
        var imgLargeHeight      = imgLarge.height;
        var imgMaxWidth         = document.viewport.getWidth()-25;
        var imgMaxHeight        = document.viewport.getHeight()-25;
  
        if((imgLargeWidth == 0) || (imgLargeHeight == 0))
        {
            imgLargeWidth = document.viewport.getWidth();
            imgLargeHeight = document.viewport.getHeight();
        }
  
        if(imgLargeWidth >= imgMaxWidth)
        { 
           imgMaxWidth = imgMaxWidth * 0.85;
        }
      
        if (imgLargeHeight >= imgMaxHeight)
        {
            imgMaxHeight = imgMaxHeight  * 0.85;
        }
        
        if((imgLargeWidth > imgMaxWidth) || (imgLargeHeight > imgMaxHeight))
        {
            //Determine what dimension is off by more
            var deltaWidth = imgLargeWidth - imgMaxWidth;
            var deltaHeight = imgLargeHeight - imgMaxHeight;
            var dScaleFactor;
            if (deltaHeight > deltaWidth)
            {
                // Scale by the height
                dScaleFactor = imgMaxHeight / imgLargeHeight;
            }
            else
            {
                //Scale by the Width
                dScaleFactor = imgMaxWidth / imgLargeWidth;
            }
            imgLargeWidth   = imgLargeWidth * dScaleFactor;
            imgLargeHeight  = imgLargeHeight * dScaleFactor;
        }
        
        var imgDimenstion = new Array();
        imgDimenstion[0] = imgLargeWidth;
        imgDimenstion[1] = imgLargeHeight;
        return imgDimenstion;
    },

    computeAndSetSize: function(imageLink,imageNum) {
            
        // calculate top and left offset for the lightbox 
        var arrayPageScroll  = document.viewport.getScrollOffsets();
        var imageElement     = imageLink.firstDescendant();
        var cumulativeOffset = imageElement.cumulativeOffset();
        var imgDimension     = this.ComputeImageResize(imageNum);
        var imgLargeWidth  = imgDimension[0]; 
        var imgLargeHeight = imgDimension[1]; 
        var cumulativeWidth = cumulativeOffset[0];
        var cumulativeHeight = cumulativeOffset[1];
        var vpHeight        = document.viewport.getHeight();
        var vpWidth         = document.viewport.getWidth();
        var minWinWidth = arrayPageScroll[0];
        var minWinHeight = arrayPageScroll[1];
        var maxWinWidth = vpWidth + minWinWidth;
        var maxWinHeight = vpHeight + minWinHeight;
        var maxImgWidth = cumulativeWidth + imgLargeWidth;
        var maxImgHeight = cumulativeHeight + imgLargeHeight;
        var lightboxLeft    = cumulativeOffset[0];
        var lightboxTop     = cumulativeOffset[1]; 
       
         // check max image width should not greater than window width
        if( maxImgWidth > maxWinWidth)
        {
            lightboxLeft  = maxWinWidth - imgLargeWidth;
        }
        
        if( cumulativeWidth < minWinWidth)
        {
            lightboxLeft  = minWinWidth;
        }

        // check max image height should not greater than window heigth
        if (maxImgHeight > maxWinHeight)
        {
            lightboxTop  = (minWinHeight + vpHeight)- (imgLargeHeight + 10);
        }
       
        if(cumulativeHeight < minWinHeight)
        {
            lightboxTop = minWinHeight + 10;
        } 
        
       lightboxLeft     = lightboxLeft + (imgLargeWidth / 2) - (document.viewport.getWidth() / 2);
       lightboxTop      = lightboxTop - (imgLargeHeight / 2);       // 

        // // var lightboxLeftMin  = arrayPageScroll[0]  + (document.viewport.getWidth() / 40);
        // var lightboxLeftMin  = (document.viewport.getWidth() / 40);
        var lightboxTopMin   = arrayPageScroll[1]  + (document.viewport.getHeight() / 40);
        // if (lightboxLeft < lightboxLeftMin)
        //     lightboxLeft = lightboxLeftMin;
        if (lightboxTop < lightboxTopMin)
            lightboxTop = lightboxTopMin;
        
        if (this.lightbox != null)
            this.lightbox.setStyle({ top: lightboxTop + 'px', left: lightboxLeft + 'px' }).show();
    },

    //
    //  changeImage()
    //  Hide most elements and preload image in preparation for resizing image container.
    //
    changeImage: function(imageNum) {   
        
        if (imageNum < 0 && this.firstPrev != '' && this.firstPrev != null) {
            this.end();
            location = this.firstPrev;
            return;
        }
        else if (imageNum == this.imageArray.length && this.lastNext != '' && this.lastNext != null) {
            this.end();
            location = this.lastNext;
            return;
        }
        else if (imageNum < 0 || imageNum >= this.imageArray.length)
        {
            this.enableKeyboardNav();
            return;
        }
        
        this.readyForMouseout = false;
        this.activeImage = imageNum; // update global var

        // hide elements during transition
        if (LightboxOptions.animate) this.loading.show();
        this.lightboxImage.hide();
        this.hoverNav.hide();
        this.prevLink.hide();
        this.nextLink.hide();
        // HACK: Opera9 does not currently support scriptaculous opacity and appear fx
        this.imageDataContainer.setStyle({opacity: .0001});
        this.numberDisplay.hide();      
        
        var imgPreloader = new Image();
        
        // once image is preloaded, resize image container
        imgPreloader.onload = (function(){
            this.lightboxImage.src = this.imageArray[this.activeImage][0];
            var imgDimension     = this.ComputeImageResize(imageNum);
            this.lightboxImage.setStyle({width: imgDimension[0] + 'px',height: imgDimension[1] + 'px'});
            this.resizeImageContainer(imgDimension[0], imgDimension[1]);
        }).bind(this);
       imgPreloader.src = this.imageArray[this.activeImage][0];
    },

    //
    //  resizeImageContainer()
    //
    resizeImageContainer: function(imgWidth, imgHeight) {

        // get current width and height
        var widthCurrent  = this.outerImageContainer.getWidth();
        var heightCurrent = this.outerImageContainer.getHeight();

        // get new width and height
        var widthNew  = (imgWidth  + LightboxOptions.borderSize * 2);
        var heightNew = (imgHeight + LightboxOptions.borderSize * 2);

        // scalars based on change from old to new
        var xScale = (widthNew  / widthCurrent)  * 100;
        var yScale = (heightNew / heightCurrent) * 100;

        // calculate size difference between new and old image, and resize if necessary
        var wDiff = widthCurrent - widthNew;
        var hDiff = heightCurrent - heightNew;

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

        // if new and old image are same size and no scaling transition is necessary, 
        // do a quick pause to prevent image flicker.
        var timeout = 0;
        if ((hDiff == 0) && (wDiff == 0)){
            timeout = 100;
            if (Prototype.Browser.IE) timeout = 250;   
        }

        (function(){
            this.prevLink.setStyle({ height: imgHeight + 'px' });
            this.nextLink.setStyle({ height: imgHeight + 'px' });
            this.imageDataContainer.setStyle({ width: widthNew + 'px' });
            
            this.showImage();
        }).bind(this).delay(timeout / 1000);

        $(this.outerImageContainer.id).observe('click', (function(event) 
        { 
            event.stop(); 
            this.end(); 
            this.navigate();
        }).bind(this));

        $(this.imageDataContainer.id).observe('click', (function(event) 
        { 
            event.stop(); 
            this.end(); 
            this.navigate();
        }).bind(this));
    },
    
    //
    //  showImage()
    //  Display image and begin preloading neighbors.
    //
    showImage: function(){
        this.loading.hide();
        new Effect.Appear(this.lightboxImage, { 
            duration: this.resizeDuration, 
            queue: 'end', 
            afterFinish: (function() { this.updateDetails(); }).bind(this) 
        });
        this.preloadNeighborImages();
    },

    //
    //  updateDetails()
    //  Display caption, image number, and bottom nav.
    //
    updateDetails: function() {
    
        // if caption is not null
        if (this.imageArray[this.activeImage][1] != ""){
            this.caption.update(this.imageArray[this.activeImage][1]).show();
        }
        
        // if image is part of set display 'Image x of x' 
        if (this.imageArray.length > 1){
            this.numberDisplay.update( LightboxOptions.labelImage + ' ' + (this.activeImage + 1) + ' ' + LightboxOptions.labelOf + '  ' + this.imageArray.length).show();
        }

        new Effect.Parallel(
            [ 
                new Effect.SlideDown(this.imageDataContainer, { sync: true, duration: this.resizeDuration, from: 0.0, to: 1.0 }), 
                new Effect.Appear(this.imageDataContainer, { sync: true, duration: this.resizeDuration }) 
            ], 
            { 
                duration: this.resizeDuration, 
                afterFinish: (function() {
                    // update overlay size and update nav
                    var arrayPageSize = this.getPageSize();
                    this.overlay.setStyle({ height: arrayPageSize[1] + 'px' });
                    this.updateNav();
                    this.readyForMouseout = true;
                }).bind(this)
            } 
        );        
    },

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

        this.hoverNav.show();               

        // if not first image in set, display prev image button
        if (this.activeImage > 0 || 
           (this.firstPrev != '' && this.firstPrev != null)) 
            this.prevLink.show();

        // if not last image in set, display next image button
        if ((this.activeImage < (this.imageArray.length - 1)) || 
            (this.lastNext != '' && this.lastNext != null)) 
             this.nextLink.show();
        
        this.enableKeyboardNav();
    },

    //
    //  enableKeyboardNav()
    //
    enableKeyboardNav: function() {
        document.observe('keydown', this.keyboardAction); 
    },

    //
    //  disableKeyboardNav()
    //
    disableKeyboardNav: function() {
        document.stopObserving('keydown', this.keyboardAction); 
    },

    //
    //  keyboardAction()
    //
    keyboardAction: function(event) {
        var keycode = event.keyCode;

        var escapeKey;
        if (event.DOM_VK_ESCAPE) {  // mozilla
            escapeKey = event.DOM_VK_ESCAPE;
        } else { // ie
            escapeKey = 27;
        }

        var key = String.fromCharCode(keycode).toLowerCase();
        
        if (key.match(/x|o|c/) || (keycode == escapeKey)){ // close lightbox
            this.end();
        } else if ((key == 'p') || (keycode == 37)){ // display previous image
            this.disableKeyboardNav();
            this.changeImage(this.activeImage - 1);
        } else if ((key == 'n') || (keycode == 39)){ // display next image
            this.disableKeyboardNav();
            this.changeImage(this.activeImage + 1);
        }
    },

    //
    //  preloadNeighborImages()
    //  Preload previous and next images.
    //
    preloadNeighborImages: function(){
        var preloadNextImage, preloadPrevImage;
        if (this.imageArray.length > this.activeImage + 1){
            preloadNextImage = new Image();
            preloadNextImage.src = this.imageArray[this.activeImage + 1][0];
        }
        if (this.activeImage > 0){
            preloadPrevImage = new Image();
            preloadPrevImage.src = this.imageArray[this.activeImage - 1][0];
        }
    
    },

    //
    //  end()
    //
    end: function() {
        this.disableKeyboardNav();
        this.lightbox.hide();
        new Effect.Fade(this.overlay, { duration: this.overlayDuration });
        $$('select', 'object', 'embed').each(function(node){ node.style.visibility = 'visible' });
    },


    //
    //  navigate()
    //
    navigate: function() {
        if (this.imageArray[this.activeImage][2] != undefined && 
            this.imageArray[this.activeImage][2] != "")
            location = this.imageArray[this.activeImage][2];
    },


    //
    //  getPageSize()
    //
    getPageSize: function() {
            
         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;
        }

        return [pageWidth,pageHeight];
    }
}

// document.observe('dom:loaded', function () { new Lightbox(); });
// document.observe('dom:loaded', function () { initLightbox(); });
// document.observe('dom:loaded', initLightbox());