// -----------------------------------------------------------------------------------
//
//	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.
//
/*

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

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

*/
//=====================================================================================
// Lightbox V2.0.4 with slideshow and EXIF data handling: by  Yasuaki    Oct 27th 2009
//
//   Last Updated : Feb 2nd, 2011
//=====================================================================================
//
//  Configurationl
//
LightboxOptions = Object.extend({
	
	fileLoadingImage:	'',
	filenaviPrevOffImage:	'',
	filenaviPrevOnImage:	'',
	filenaviNextOffImage:	'',
	filenaviNextOnImage:	'',
	filenaviCloseImage:	'',
	filenaviPlayImage:	'',

	overlayOpacity: 0.9,   // controls transparency of shadow overlay

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

	borderSize: 0,		 //if you adjust the padding in the CSS, you will need to update this variable

	slidePlayInterval: 5.0,	// default interval ( 5.0 sec )
	doSlideShow: 0,
	
	// When grouping images this is used to write: Image # of #.
	// Change it for non-english localization
	labelImage: "",
	labelOf: " / "
	
}, window.LightboxOptions || {});

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

var Lightbox = 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';
		

		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')
							)
						)
					])
				),

			Builder.node('div', {id:'imageInfoContainer'}, [

				Builder.node('div',{id:'navigation'}, [
					Builder.node('span',{id:'imageNumber'}),
					Builder.node('a',{id:'naviPlay', href: '#' },
						Builder.node('img')
					),
					Builder.node('p',{id:'naviPrevOff' },
						Builder.node('img')
					),
					Builder.node('a',{id:'naviPrevOn', href: '#' },
						Builder.node('img')
					),
					Builder.node('p',{id:'naviNextOff' },
						Builder.node('img')
					),
					Builder.node('a',{id:'naviNextOn', href: '#' },
						Builder.node('img')
					),
					Builder.node('a',{id:'naviClose', href: '#' },
						Builder.node('img')
					)
				] ), // Builder.node('div',{id:'navigation'}, [

				Builder.node('div',{id:'imageData'}, [
					Builder.node('div',{id:'imageDetails'}, [
						Builder.node('p',{id:'caption1'}),
						Builder.node('p',{id:'caption2'}),
						Builder.node('p',{id:'caption3'})
					]),
				] ) // Builder.node('div',{id:'imageData'}, [

			] ) // Builder.node('div', {id:'imageInfoContainer'},

		])); // objBody.appendChild()

		$('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(); 
			LightboxOptions.doSlideShow = 0;
			this.changeImage(this.activeImage - 1);
			}).bindAsEventListener(this));
			
		$('nextLink').observe('click', (function(event) { 
			event.stop(); 
			LightboxOptions.doSlideShow = 0;
			this.changeImage(this.activeImage + 1); 
			}).bindAsEventListener(this));
					
		
		$('loadingLink').observe('click', (function(event) { event.stop(); this.end(); }).bind(this));
		
		$('naviPrevOn').observe('click', (function(event) {
			event.stop(); this.changeImage(this.activeImage - 1); 
			}).bindAsEventListener(this));
		
		$('naviNextOn').observe('click', (function(event) { 
			event.stop(); this.changeImage(this.activeImage + 1); 
			}).bindAsEventListener(this));
		
		$('naviPlay').observe('click', (function(event) { 
			event.stop(); this.setupSlideShow(); 
			}).bindAsEventListener(this));
		
		$('naviClose').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 ' + 
				'imageInfoContainer  navigation imageNumber naviPrevOff naviPrevOn naviNextOff naviNextOn naviClose naviPlay  imageData imageDetails caption1 caption2 caption3' ;
			$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));
		
		LightboxOptions.doSlideShow = 0;
	},

//
//  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) { 
				// find the clicked image
				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.imageInfoContainer.setStyle({opacity: .0001});
		this.imageNumber.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.imageInfoContainer.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: 1.0, 
			queue: 'end', 
			afterFinish: ( function(){ this.updateDetails(); } ).bind(this) 
		});
		
	},

//
//  updateDetails()
//  Display caption, image number, and bottom nav.
//
	updateDetails: function() {


		// if caption is not null
		if ( this.imageArray[this.activeImage][1] != "") {
			
			var originalTitleString = String( this.imageArray[this.activeImage][1]);
			var tmpString	   = String("");
			var caption1String = String("");
			var caption2String = String("");
			var caption3String = String("");
			
			// dividing the title string
			tmpString = originalTitleString.split("::");

			// caption line #1
			caption1String = tmpString[0];
			this.caption1.update(caption1String).show();

			// get an active lightboxed image
			var theLightBoxImage = document.getElementById("lightboxImage");

			if ( theLightBoxImage ) {
			
				EXIF.getData( theLightBoxImage,  function() {

					var theDateTime = EXIF.getTag( theLightBoxImage, "DateTimeOriginal" ); 
					var theMake = EXIF.getTag( theLightBoxImage, "Make" ); 
					var theModel = EXIF.getTag( theLightBoxImage, "Model" ); 
					var theApertureValue = EXIF.getTag( theLightBoxImage, "ApertureValue" ); 
					var theFNumber = EXIF.getTag( theLightBoxImage, "FNumber" );
					var theExposureTime = EXIF.getTag( theLightBoxImage, "ExposureTime" ); 
					var theISOSpeedRatings = EXIF.getTag( theLightBoxImage, "ISOSpeedRatings" ); 
					var theExposureBias = EXIF.getTag( theLightBoxImage, "ExposureBias" ); 
					var theFocalLength = EXIF.getTag( theLightBoxImage, "FocalLength" ); 
					var theFocalLengthIn35 = EXIF.getTag( theLightBoxImage, "FocalLengthIn35mmFilm" ); 
					var theExposureMode = EXIF.getTag( theLightBoxImage, "ExposureMode" ); 
					var theSubjectDistanceRange = EXIF.getTag( theLightBoxImage, "SubjectDistanceRange" ); 
					var theGPSLatitude = EXIF.getTag( theLightBoxImage, "GPSLatitude" ); 
					var theGPSLatitudeRef = EXIF.getTag( theLightBoxImage, "GPSLatitudeRef" ); 
					var theGPSLongitude = EXIF.getTag( theLightBoxImage, "GPSLongitude" ); 
					var theGPSLongitudeRef = EXIF.getTag( theLightBoxImage, "GPSLongitudeRef" ); 
					var theGPSAltitude = EXIF.getTag( theLightBoxImage, "GPSAltitude" ); 
					var theGPSAltitudeRef = EXIF.getTag( theLightBoxImage, "GPSAltitudeRef" ); 
					var theGPSMapDatum = EXIF.getTag( theLightBoxImage, "GPSMapDatum" ); 
					var theGPSSatellites = EXIF.getTag( theLightBoxImage, "GPSSatellites" ); 
					var theGPSDateStamp = EXIF.getTag( theLightBoxImage, "GPSDateStamp" ); 
					var theGPSTimeStamp = EXIF.getTag( theLightBoxImage, "GPSTimeStamp" ); 
					var theGPSImgDirection = EXIF.getTag( theLightBoxImage, "GPSImgDirection" ); 
					var theGPSImgDirectionRef = EXIF.getTag( theLightBoxImage, "GPSImgDirectionRef" ); 

					var descrition = 
						( theDateTime ?  "Date/Time: " + theDateTime  : "" ) + 
						( theGPSLatitude ? "  Location: " + ExifGPSValueToDMSString( theGPSLatitude, theGPSLatitudeRef ) : "" ) + 
						( theGPSLongitude ?  ", " + ExifGPSValueToDMSString( theGPSLongitude, theGPSLongitudeRef ) : "" ) +
						( theGPSAltitude ? "  Altitude: " + ExifGPSAltitudeString( theGPSAltitude, theGPSAltitudeRef ) : "" ) +
						( theGPSMapDatum ? "  " + theGPSMapDatum : "" );

					var exifData = 
						( ( theModel || theMake ) ?  " Model: " + theMake + " " + theModel : "" ) + 
						( theExposureTime ?  " Exposure Time: 1/" +  Math.floor( ( Math.round( (1.0/theExposureTime) * 100 ) ) ) / 100.0 + " s," : "" ) + 
						( theFNumber ?  " F: " + theFNumber + ",": "" ) + 
						( theExposureBias ?  " Bias: " + theExposureBias  : "" ) +
						( theISOSpeedRatings ? " ISO: " + theISOSpeedRatings : "" ) +
						( theFocalLength ? " Focal Length: " + theFocalLength + "mm" : "" ) +
						( theGPSImgDirection ? " Direction: " + ( Math.round( theGPSImgDirection ) ) + " " + theGPSImgDirectionRef : "" );

					// caption line #2
					if ( descrition ) {
						var theCaption2 = document.getElementById("caption2");
						theCaption2.update(descrition).show();
					}

					// caption line #3
					if ( exifData ) {
						var theCaption3 = document.getElementById("caption3");
						theCaption3.update(exifData).show();
					}

				} ); // end of function  [ EXIF.getData() ]

			} // end if ( theLightBoxImage )

		} // if ( this.imageArray[this.activeImage][1] != "") 
		


		// if image is part of set display 'Image x of x' 
		if ( this.imageArray.length > 1 ) {
		
			this.imageNumber.update( LightboxOptions.labelImage + ' ' + (this.activeImage + 1) + ' ' + LightboxOptions.labelOf + '  ' + this.imageArray.length).show();
		}

		new Effect.Parallel(
			[ 
				new Effect.SlideDown(this.imageInfoContainer, { sync: true, duration: this.resizeDuration, from: 0.0, to: 1.0 }), 
				new Effect.Appear(this.imageInfoContainer, { 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)
			} 
		);
				
		// loading next image
		this.preloadNeighborImages();
		
	},

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

		this.hoverNav.show();

		if ( this.imageArray.length == 1) {
		
			this.naviPrevOn.hide();
			this.naviNextOn.hide();
			this.naviPrevOff.show();
			this.naviNextOff.show();
			this.naviPlay.hide();
			
		} else {
		
			this.naviPlay.show();
		}
		
		// if not first image in set, display prev image button
		if (this.activeImage > 0) {
		
			this.prevLink.show();
			this.naviPrevOff.hide();
			this.naviPrevOn.show();
			
		} else {
			// the first image
			
			this.naviPrevOn.hide();
			this.naviPrevOff.show();
			this.naviNextOff.hide();
			this.naviNextOn.show();
		}
		
		// if not last image in set, display next image button
		if (this.activeImage < (this.imageArray.length - 1)) {
		
			this.nextLink.show();
 			this.naviNextOff.hide();
			this.naviNextOn.show();
			
		} else {
			// the last image
			
			this.naviPrevOff.hide();
			this.naviPrevOn.show();
 			this.naviNextOn.hide();
			this.naviNextOff.show();
		}

		// hide navigation button ( single image )
		if ( this.imageArray.length == 1) {		
			this.naviPrevOn.hide();
 			this.naviNextOn.hide();
			this.naviPrevOff.show();
			this.naviNextOff.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)){ 
		
			//alert( "Escape Key was pressed : " + LightboxOptions.doSlideShow );
			
			if ( LightboxOptions.doSlideShow == 0 ) {
				// close lightbox
				this.end();
			} else {
				this.pauseSlideShow();
			}
			
		} 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];
	},
	
//===================================================================================
//  setupSlideShow()
//===================================================================================
	setupSlideShow: function() {
	
		LightboxOptions.doSlideShow = 1;
		
		this.imageInfoContainer.setStyle({opacity: .0001});
		this.imageNumber.hide();

		this.doShowTheNextSlide();
		
	},

//===================================================================================
//  pauseSlideShow()
//===================================================================================
	pauseSlideShow: function() {
	
		LightboxOptions.doSlideShow = 0;
		
		//  back to the previous image
		if ( this.activeImage != 0 ) {
			this.activeImage = this.activeImage - 1;
		} else {
			// return to the last image
			this.activeImage = (this.imageArray.length - 1); 
		}
		this.changeImage(this.activeImage);
		
	},
	
//===================================================================================
//  doShowTheNextSlide()
//===================================================================================
	doShowTheNextSlide: function() {

	var delayTime = LightboxOptions.slidePlayInterval;
	var durationTime = 1.0;
	
	// set interval 
	if ( this.imageArray[this.activeImage][1] != "") {
			
			var originalTitleString = String( this.imageArray[this.activeImage][1]);
			var tmpString	 = originalTitleString.split("::");
			
			if ( tmpString[2] ) {
				delayTime = tmpString[2];
			}
	}

	if ( LightboxOptions.doSlideShow == 1 ) {
	
		// fadeout previous slide and show a new slide
		
		new Effect.Fade( this.lightboxImage, { 
				duration: durationTime, 
				queue: 'end', 
				delay: delayTime,
					
				afterFinish: ( function(){ 
					// set next slide
					if ( this.activeImage != (this.imageArray.length - 1) ) {
						this.activeImage = this.activeImage + 1;
					} else {
						// return to the first image
						this.activeImage = 0; 
					}
					this.changeSlideImage( this.activeImage );
					
				} ).bind(this) 
		});
	}
	
	},

//===================================================================================
//  changeSlideImage()
//===================================================================================
	changeSlideImage: function( imageNum ) {

		this.activeImage = imageNum; // update global var

		var imgPreloader = new Image();

		// once image is preloaded, resize image container
		imgPreloader.onload = (function(){
			this.lightboxImage.src = this.imageArray[this.activeImage][0];
			this.resizeSlideImageContainer(imgPreloader.width, imgPreloader.height);
		}).bind(this);
		
		imgPreloader.src = this.imageArray[this.activeImage][0];
	},
	
//===================================================================================
//  resizeSlideImageContainer()
//===================================================================================
	resizeSlideImageContainer: 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.showSlideImage();
			
		}).bind(this).delay(timeout / 1000);
	},
	
//===================================================================================
//  showSlideImage()
//===================================================================================
	showSlideImage: function(){

		this.loading.hide();

		new Effect.Appear(this.lightboxImage, { 
			duration: 1.0, 
			queue: 'end', 
			afterFinish: ( function(){ 
					this.doShowTheNextSlide();
				 } ).bind(this) 
		});
		
	}
	
} 
//===================================================================================

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

//=================================================================================
function hi_pause( millisec ) {
	var theDate = new Date();
	var currentDate = null;

	do { 
		currentDate = new Date(); 
	} while( currentDate - theDate < millisec );
}