// -----------------------------------------------------------------------------------
//
//	Lightbox v2.1
//	by Lokesh Dhakar (Lightbox - http://www.lokeshdhakar.com) & Joseph Fowler (IFrameLightbox - http://www.d3corp.com)
//	Last Modification: 9/16/08
//
//	For more information, visit:
//	http://www.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.
//
// -----------------------------------------------------------------------------------
/*

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

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

//
//  Configuration
//
LightboxOptions = Object.extend({
    fileLoadingImage:        '/images/lightbox/loading.gif',     
    fileBottomNavCloseImage: '/images/lightbox/closelabel.gif',

    overlayOpacity: 0.8,   // controls transparency of shadow overlay

    animate: true,         // toggles resizing animations
    resizeSpeed: 7,        // controls the speed of the image/map resizing animations (1=slowest and 10=fastest)

    borderSize: 10,         // if you adjust the padding in the CSS, you will need to update this variable
	
	iframeScroll: 'no',	// for the GMap, set to 'yes' or 'no' to allow scrolling

	// When grouping images/maps this is used to write: [Image][Map] # of #.
	// Change it for non-english localization
	labelImage: "Image",
	labelOf: "of",
	labelMap: "Map"
}, window.LightboxOptions || {});

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

var Lightbox		= Class.create();
var IFrameLightbox	= Class.create();

Lightbox.prototype = {
    imageArray: [],
    activeImage: 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">
        //              <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="/images/lightbox/loading.gif">
        //                  </a>
        //              </div>
        //          </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="/images/lightbox/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('img',{id:'lightboxImage'}), 
                    Builder.node('div',{id:'hoverNav'}, [
                        Builder.node('a',{id:'prevLink', href: '#' }),
                        Builder.node('a',{id:'nextLink', href: '#' })
                    ]),
                    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));

        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();
    },

    //
    // 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[rel^=lightbox]') || event.findElement('area[rel^=lightbox]');
            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) {    

        $$('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' });

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

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

        if ((imageLink.rel == 'lightbox')){
            // if image is NOT part of a set, add single image to imageArray
            this.imageArray.push([imageLink.href, imageLink.title]);         
        } else {
            // if image is part of a set..
            this.imageArray = 
                $$(imageLink.tagName + '[href][rel="' + imageLink.rel + '"]').
                collect(function(anchor){ return [anchor.href, anchor.title]; }).
                uniq();
            
            while (this.imageArray[imageNum][0] != imageLink.href) { imageNum++; }
        }

        // calculate top and left offset for the lightbox 
        var arrayPageScroll = document.viewport.getScrollOffsets();
        var lightboxTop = arrayPageScroll[1] + (document.viewport.getHeight() / 10);
        var lightboxLeft = arrayPageScroll[0];
        this.lightbox.setStyle({ top: lightboxTop + 'px', left: lightboxLeft + 'px' }).show();
        
        this.changeImage(imageNum);
    },

    //
    //  changeImage()
    //  Hide most elements and preload image in preparation for resizing image container.
    //
    changeImage: function(imageNum) {   
        
        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];
            this.resizeImageContainer(imgPreloader.width, imgPreloader.height);
        }).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);
    },
    
    //
    //  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();
                }).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.prevLink.show();

        // if not last image in set, display next image button
        if (this.activeImage < (this.imageArray.length - 1)) 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
            if (this.activeImage != 0){
                this.disableKeyboardNav();
                this.changeImage(this.activeImage - 1);
            }
        } else if ((key == 'n') || (keycode == 39)){ // display next image
            if (this.activeImage != (this.imageArray.length - 1)){
                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' });
    },

    //
    //  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];
	}
}

IFrameLightbox.prototype = {
    iframeArray: [],
    activeIFrame: undefined,
    
    // initialize()
    // Constructor runs on completion of the DOM loading. Calls updateIFrameList and then
    // the function inserts html at the bottom of the page which is used to display the shadow 
    // overlay and the iframe container.
    //
    initialize: function() {
        this.updateIFrameList();
        
        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 IFrameLightbox starts it will resize itself from 250 by 250 to the current iframe 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="iframe_overlay"></div>
        //  <div id="iframe_lightbox">
        //      <div id="iframe_outerIFrameContainer">
        //          <div id="iframe_iframeContainer">
        //              <iframe src="" id="iframe_lightboxIFrame" frameborder="0" scrolling="no">
        //          </div>
        //      </div>
        //      <div id="iframe_iframeDataContainer">
        //          <div id="iframe_iframeData">
        //              <div id="iframe_iframeDetails">
        //                  <span id="iframe_caption"></span>
        //                  <span id="iframe_numberDisplay"></span>
        //              </div>
        //              <div id="iframe_bottomNav">
        //                  <a href="#" id="iframe_bottomNavClose">
        //                      <img src="/images/lightbox/close.gif">
        //                  </a>
        //              </div>
        //          </div>
        //      </div>
        //  </div>

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

		objBody.appendChild(Builder.node('div',{id:'iframe_overlay'}));
	
        objBody.appendChild(Builder.node('div',{id:'iframe_lightbox'}, [
            Builder.node('div',{id:'iframe_outerIFrameContainer'}, 
                Builder.node('div',{id:'iframe_iframeContainer'}, [
                    Builder.node('iframe',{id:'iframe_lightboxIFrame', frameborder: '0', scrolling: LightboxOptions.iframeScroll })
                ])
            ),
            Builder.node('div', {id:'iframe_iframeDataContainer'},
                Builder.node('div',{id:'iframe_iframeData'}, [
                    Builder.node('div',{id:'iframe_iframeDetails'}, [
                        Builder.node('span',{id:'iframe_caption'}),
                        Builder.node('span',{id:'iframe_numberDisplay'})
                    ]),
                    Builder.node('div',{id:'iframe_bottomNav'},
                        Builder.node('a',{id:'iframe_bottomNavClose', href: '#' },
                            Builder.node('img', { src: LightboxOptions.fileBottomNavCloseImage })
                        )
                    )
                ])
            )
        ]));

		$('iframe_overlay').hide().observe('click', (function() { this.end(); }).bind(this));
		$('iframe_lightbox').hide().observe('click', (function(event) { if (event.element().id == 'iframe_lightbox') this.end(); }).bind(this));
		$('iframe_outerIFrameContainer').setStyle({ width: size, height: size });
		$('iframe_bottomNavClose').observe('click', (function(event) { event.stop(); this.end(); }).bind(this));

        var th = this;
        (function() {
            var ids = 
                'iframe_overlay iframe_lightbox iframe_outerIFrameContainer iframe_iframeContainer iframe_lightboxIFrame ' + 
                'iframe_iframeDataContainer iframe_iframeData iframe_iframeDetails iframe_caption iframe_numberDisplay iframe_bottomNav iframe_bottomNavClose';   
            $w(ids).each(function(id) { th[id] = $(id); });
        }).defer();
    },

    //
    // updateIFrameList()
    // Loops through anchor tags looking for 'iframe_lightbox' references and applies onclick
    // events to appropriate links. You can rerun after dynamically adding iframes w/ajax.
    //
    updateIFrameList: function() {   
        this.updateIFrameList = Prototype.emptyFunction;

        document.observe('click', (function(event) {
            var target = event.findElement('a[rel^=iframe_lightbox]') || event.findElement('area[rel^=iframe_lightbox]');
            if (target) {
                event.stop();
                this.start(target);
            }
        }).bind(this));
    },
    
    //
    //  start()
    //  Display iframe_overlay and iframe_lightbox. If iframe is part of a set, add siblings to iframeArray.
    //
    start: function(iframeLink) {
        $$('select', 'object', 'embed').each(function(node) { node.style.visibility = 'hidden' });

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

        new Effect.Appear(this.iframe_overlay, { duration: this.overlayDuration, from: 0.0, to: LightboxOptions.overlayOpacity });

        this.iframeArray	= [];
        var iframeNum		= 0;       

        if ((iframeLink.rel == 'iframe_lightbox')) {
            // if iframe is NOT part of a set, add single iframe to iframeArray
            this.iframeArray.push([iframeLink.href, iframeLink.title]);         
        } else {
            // if iframe is part of a set..
            this.iframeArray = 
                $$(iframeLink.tagName + '[href][rel="' + iframeLink.rel + '"]').
                collect(function(anchor) { return [anchor.href, anchor.title]; }).
                uniq();
            
            while (this.iframeArray[iframeNum][0] != iframeLink.href) { iframeNum++; }
        }

        // calculate top and left offset for the iframe_lightbox 
        var arrayPageScroll		= document.viewport.getScrollOffsets();
        var iframe_lightboxTop	= arrayPageScroll[1] + (document.viewport.getHeight() / 10);
        var iframe_lightboxLeft	= arrayPageScroll[0];
        this.iframe_lightbox.setStyle({ top: iframe_lightboxTop + 'px', left: iframe_lightboxLeft + 'px' }).show();
        
        this.changeIFrame(iframeNum);
    },

    //
    //  changeIFrame()
    //  Hide most elements and prep for resizing iframe container.
    //
    changeIFrame: function(iframeNum) {
        this.activeIFrame = iframeNum; // update global var

        // hide elements during transition
        this.iframe_lightboxIFrame.hide();
		// HACK: Opera9 does not currently support scriptaculous opacity and appear fx
        this.iframe_iframeDataContainer.setStyle({opacity: .0001});
        this.iframe_numberDisplay.hide();
		
        this.iframe_lightboxIFrame.src = this.iframeArray[this.activeIFrame][0];
		this.resizeIFrameContainer(500, 300);
    },

    //
    //  resizeIFrameContainer()
    //
    resizeIFrameContainer: function(iframeWidth, iframeHeight) {
        // get current width and height
        var widthCurrent 	= this.iframe_outerIFrameContainer.getWidth();
        var heightCurrent	= this.iframe_outerIFrameContainer.getHeight();

        // get new width and height
        var widthNew		= (iframeWidth  + LightboxOptions.borderSize * 2);
        var heightNew		= (iframeHeight + 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 iframe, and resize if necessary
        var wDiff			= widthCurrent - widthNew;
        var hDiff			= heightCurrent - heightNew;

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

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

        (function() {
            this.iframe_iframeDataContainer.setStyle({ width: widthNew + 'px' });

            this.showIFrame();
        }).bind(this).delay(timeout / 1000);
    },
    
    //
    //  showIFrame()
    //  Display iframe.
    //
    showIFrame: function() {
        new Effect.Appear(this.iframe_lightboxIFrame, { 
            duration: this.resizeDuration, 
            queue: 'end', 
            afterFinish: (function() { this.updateDetails(); }).bind(this) 
        });
    },

    //
    //  updateDetails()
    //  Display iframe_caption, iframe number, and bottom nav.
    //
    updateDetails: function() {
        // if iframe_caption is not null
        if (this.iframeArray[this.activeIFrame][1] != "") {
            this.iframe_caption.update(this.iframeArray[this.activeIFrame][1]).show();
        }

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

    //
    //  updateNav()
    //  Display appropriate previous and next hover navigation.
    //
    updateNav: function() {        
        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 iframe_lightbox
            this.end();
        } else if ((key == 'p') || (keycode == 37)) { // display previous iframe
            if (this.activeIFrame != 0) {
                this.disableKeyboardNav();
                this.changeIFrame(this.activeIFrame - 1);
            }
        } else if ((key == 'n') || (keycode == 39)) { // display next iframe
            if (this.activeIFrame != (this.iframeArray.length - 1)) {
                this.disableKeyboardNav();
                this.changeIFrame(this.activeIFrame + 1);
            }
        }
    },

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

    //
    //  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 () { new IFrameLightbox(); });