// -----------------------------------------------------------------------------------
//
//	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()
    - changeSlideshowStatus()
    - end()
    
    Function Calls
    - document.observe()
   
*/
// -----------------------------------------------------------------------------------

//
//  Configurationl
//
LightboxOptions = Object.extend({
    fileLoadingImage:        'img/loading.gif',     
    fileBottomNavCloseImage: 'img/closelabel.gif',
	fileSlideshowImageStart:		 'img/slideshow.gif',
	fileSlideshowImageStop:		 'img/slideshow2.gif',

    overlayOpacity: 0.8,   // 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: 10,         //if you adjust the padding in the CSS, you will need to update this variable

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

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

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

Lightbox.prototype = {
    imageArray: [],
    activePageImage: undefined,
	activeImage: undefined,
	scaledImgHeight: undefined,
	origImgHeight: undefined,
	origImgWidth: undefined,
	slideshowInterval: undefined,
	slideshowActive: false,
	slideshowPause: false,
	imageCount: undefined,
	isRandom: undefined,
	galArgs: undefined,
	activeOffset: undefined,
	remoteGallery: new ajaxGallery(),
    
    // 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';
		
		//determine window height for image scaling
		if( typeof( window.innerWidth ) == 'number' ) {
			//Non-IE
			this.scaledImgHeight = window.innerHeight - 200;
		} else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
			//IE 6+ in 'standards compliant mode'
			this.scaledImgHeight = document.documentElement.clientHeight - 200;
		}

        // 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="resizeLink"></a>
        //                  <a href="#" id="prevLink"></a>
        //                  <a href="#" id="nextLink"></a>
        //              </div>
        //              <div id="loading">
        //                  <a href="#" id="loadingLink">
        //                      <img src="images/loading.gif">
        //                  </a>
        //              </div>
        //          </div>
        //      </div>
        //      <div id="imageDataContainer">
        //          <div id="imageData">
        //              <div id="imageDetails">
        //                  <span id="caption"></span>
        //                  <span id="numberDisplay"></span>
		//					<div id="rating"></div>
        //              </div>
        //              <div id="slideshow">
        //                 <a href="#" id="slideshowLink">
		//                     <img src="img/slideshow.gif">
        //              </div>
        //              <div id="bottomNav">
        //                  <a href="#" id="bottomNavClose">
        //                      <img src="images/close.gif">
        //                  </a>
        //              </div>
		//				<div id="imgLink"></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:'resizeLink', href: '#' }),
                        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:'rating'})
                    ]),
					Builder.node('div',{id:'slideshow'}, 
						Builder.node('a',{ id:'slideshowLink', href: '#' },
                            Builder.node('img', { id:'slideshowImage', src: LightboxOptions.fileSlideshowImageStart })
                        )
                    ),
                    Builder.node('div',{id:'bottomNav'},
                        Builder.node('a',{id:'bottomNavClose', href: '#' },
                            Builder.node('img', { src: LightboxOptions.fileBottomNavCloseImage })
                        )
                    ),
					Builder.node('div',{id:'imgLink'})
                ])
            )
        ]));


		$('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.activePageImage - 1, true); }).bindAsEventListener(this));
		$('nextLink').observe('click', (function(event) { event.stop(); this.changeImage(this.activePageImage + 1 , true); }).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 resizeLink prevLink nextLink loading loadingLink ' + 
                'imageDataContainer imageData imageDetails caption numberDisplay rating slideshow slideshowLink slideshowImage bottomNav bottomNavClose imgLink';   
            $w(ids).each(function(id){ th[id] = $(id); });
        }).defer();
		myLightbox = this;
    },

    //
    // 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){
			if(event.isLeftClick()) {
				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() / 25);
        var lightboxLeft = arrayPageScroll[0];
        this.lightbox.setStyle({ top: lightboxTop + 'px', left: lightboxLeft + 'px' }).show();
		
		// HACK: Opera9 does not currently support scriptaculous opacity and appear fx
		this.imageDataContainer.setStyle({opacity: .0001});
		this.numberDisplay.hide();
		
		// update image count, check if random section is active and set active offset
		var randomRegEx = /\?show=random/;
		this.isRandom = randomRegEx.test(window.location.search);
		if(this.isRandom) {
			this.getHTTPGetVars();
			if(this.galArgs['view'] == "single") {
				this.imageCount = this.imageArray.length;
				this.changeImage(imageNum, false);
			}
			else {
				this.imageCount = this.remoteGallery.getCompleteRandomSize();
				this.activeOffset = parseInt(document.getElementById('activeOffset').innerHTML) * 12;
				this.changeImage(imageNum, true);
			}
		}
		else {
			this.getHTTPGetVars();
			if(this.galArgs['view'] == "split") {
				this.activeOffset = document.getElementById('activeOffset') != null ? (parseInt(document.getElementById('activeOffset').innerHTML) * 12) : 0;
				this.imageCount = this.remoteGallery.getCompleteGallerySize(this.galArgs['galName'], this.galArgs['album']);
			}
			else {
				this.imageCount = this.imageArray.length;
			}
			this.changeImage(imageNum, true);
		}
    },

	//
	//	continueLightbox()
	//	Continues the display of the lightbox with the new Pictures which were loaded wihtin an previous ajax call
	//
	continueLightbox: function(newOffset, startWithLastImage, groupName) {
		
		this.activeOffset = parseInt(newOffset);

		this.imageArray = [];
		this.imageArray = 
                $$('A[href][rel="lightbox[' + groupName + ']"]').
                collect(function(anchor){ return [anchor.href, anchor.title]; }).
                uniq();
            
		if(startWithLastImage) {
			var imageNum = this.imageArray.length - 1;
		}
		else {
			var imageNum = 0;
		}
		this.changeImage(imageNum, true);
	},
		
    //
    //  changeImage()
    //  Hide most elements and preload image in preparation for resizing image container.
    //
    changeImage: function(imageNum, doResize) {   
        
		this.activePageImage = imageNum; // update global var
		if(this.galArgs['view'] == "split") {
			this.activeImage = parseInt(this.activeOffset) + parseInt(this.activePageImage);
		}
		else {
			this.activeImage = this.activePageImage;
		}
		// hide elements during transition
		if (LightboxOptions.animate) this.loading.show();
		this.lightboxImage.hide();
		this.hoverNav.hide();
		this.resizeLink.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.activePageImage][0];
			this.origImgHeight = imgPreloader.height;
			this.origImgWidth = imgPreloader.width;
			if(this.origImgHeight > this.scaledImgHeight && doResize) {
				var scaling = this.scaledImgHeight / imgPreloader.height;
				scaledWidth = Math.round(imgPreloader.width * scaling);
				scaledHeight = this.scaledImgHeight;
				this.resizeImageContainer(scaledWidth, scaledHeight, true);
			}
			else {
				this.resizeImageContainer(imgPreloader.width, imgPreloader.height, false);
			}
		}).bind(this);
		if(this.slideshowActive) {
			this.slideshowPause = true;
			this.deactivateSlideshow();
		}
		imgPreloader.src = this.imageArray[this.activePageImage][0];
    },

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

        // 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(doResize);
        }).bind(this).delay(timeout / 1000);
    },
    
    //
    //  showImage()
    //  Display image and begin preloading neighbors.
    //
    showImage: function(doResize){
        this.loading.hide();
		// resize the image
		if(this.origImgHeight > this.scaledImgHeight && doResize) {
			var scaling = this.scaledImgHeight / this.origImgHeight;
			this.lightboxImage.setStyle({ width: Math.round(this.origImgWidth * scaling) + 'px' });
			this.lightboxImage.setStyle({ height: this.scaledImgHeight + 'px' });
		}
		else {
			this.lightboxImage.setStyle({ width: this.origImgWidth + 'px' });
			this.lightboxImage.setStyle({ height: this.origImgHeight + 'px' });
		}
        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.activePageImage][1] != ""){
            this.caption.update('<a href="' + this.imageArray[this.activePageImage][0] + '">' + this.imageArray[this.activePageImage][1] + '</a>').show();
        }
        
        // if image is part of set display 'Image x of x' 
        if (this.imageCount > 1){
			this.numberDisplay.update( LightboxOptions.labelImage + ' ' + (this.activeImage + 1) + ' ' + LightboxOptions.labelOf + '  ' + this.imageCount).show();
        }
		
		//if random page display rating block
		if(this.isRandom) {
			if(this.galArgs['view'] == "single") {
				var getit = new Array();
				id = this.imageArray[this.activePageImage][0].split("id=");
				var imageDetails = this.remoteGallery.getImageDetails("", id[1]);
			}
			else {
				var getit = new Array();
				filename = this.imageArray[this.activePageImage][0].split("random/");
				var imageDetails = this.remoteGallery.getImageDetails(filename[1], "");
			}
			var rating = imageDetails[0];
			var count = imageDetails[1];
			var voted = imageDetails[2];
			var randomID = imageDetails[3];
			var rating1 = Math.round(rating * 10) / 10;
			var rating2 = Math.round(rating * 100) / 100;
			var rating_width = rating2 * 25;
			var rater = '<div id="lightbox_rating' + randomID + '" class="lightbox_ratingblock">';
			rater = rater + '<div id="lightbox_unit_long' + randomID + '">';
			rater = rater + '  <ul id="lightbox_unit_ul' + randomID + '" class="unit-rating" style="width:125px;">';
			rater = rater + '     <li class="current-rating" style="width:' + rating_width + 'px;">Currently ' + rating2 + '/5</li>';
				
			if(!voted) { // if the user hasn't yet voted, draw the voting stars
				for (ncount = 1; ncount <= 5; ncount++) { // loop from 1 to the number of units
					rater = rater + '<li><a href="#" title="' + ncount + ' out of 5" class="r' + ncount + '-unit rater" rel="nofollow" onClick="doRate(' + randomID + ', ' + ncount + ', true, ' + this.galArgs['view'] + ', true); return false;">' + ncount + '</a></li>';
				}
			}

			rater = rater + '  </ul>';
			rater = rater + '  <p style="margin:0px; padding:0px; font-size:9px;"';
			if(voted){ rater = rater + ' class="voted"'; }
			rater = rater + '>Rating: <strong> ' + rating1 + '</strong>/5 - ' + count + ' votes';
			rater = rater + '  </p>';
			rater = rater + '</div>';
			rater = rater + '</div>';
			this.rating.update(rater);
			
			// update image Link {
			if(this.galArgs['view'] == "single") {
				this.imgLink.update('<span style="color:#9F3BBF;">Image link:</span> <input type="text" value="http://jaybee.cc/index.php?show=random&imgid=' + this.galArgs['imgid'] + '"  style="width:310px; height:13px; font-size:11px;" readonly>');
			}
			else {
				this.imgLink.update('<span style="color:#9F3BBF;">Image link:</span> <input type="text" value="http://jaybee.cc/index.php?show=random&imgid=' + randomID + '"  style="width:310px; height:13px; font-size:11px;" readonly>');
			}
		}
		
		// adjust slideshow image, status and onClick methods
		$('slideshowLink').stopObserving();
		// activePageImage not last image?
		if(this.activePageImage + 1 < this.imageCount) {
			// if slideshow not active and not paused set onClick methods to active it,
			if(this.slideshowActive != true && this.slideshowPause != true) {
				if(this.galArgs['view'] == "split" && this.activePageImage % 11 == 0 && this.activePageImage != 0) {
					if(this.isRandom) {
						$('slideshowLink').observe('click', (function(event) { event.stop(); this.activateSlideshow("myLightbox.remoteGallery.updateImages(true, myLightbox.activeOffset + 12, false);"); }).bind(this));
					}
					else {
						$('slideshowLink').observe('click', (function(event) { event.stop(); this.activateSlideshow("myLightbox.remoteGallery.updateImages(false, myLightbox.activeOffset + 12, false, myLightbox.galArgs);"); }).bind(this));
					}
				}
				else {
					$('slideshowLink').observe('click', (function(event) { event.stop(); this.activateSlideshow("myLightbox.changeImage(myLightbox.activePageImage + 1 , true);"); }).bind(this));
				}
			}
			
			// if slideshowPause flag is set, slideshow must have been disabled during image change. reactivate it
			if(this.slideshowPause == true) {
				if( this.galArgs['view'] == "split" && this.activePageImage % 11 == 0 && this.activePageImage != 0) {
					if(this.isRandom) {
						this.activateSlideshow("myLightbox.remoteGallery.updateImages(true, myLightbox.activeOffset + 12, false);");
					}
					else {
						this.activateSlideshow("myLightbox.remoteGallery.updateImages(false, myLightbox.activeOffset + 12, false, myLightbox.galArgs);");
					}
				}
				else {
					this.activateSlideshow("myLightbox.changeImage(myLightbox.activePageImage + 1 , true);");
				}
				this.slideshowPause = false;
			}
		}
		else {
			if(this.slideshowActive || this.slideshowPause) {
				this.deactivateSlideshow();
				this.slideshowPause = false;
				$('slideshowLink').stopObserving();
				$('slideshowLink').observe('click', (function(event) { event.stop(); alert("Can not start slideshow!\nYou are at the end of the image set."); }).bind(this));
			}
		}

        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 image was resized, display resize Button
		var lightboxImgHeigth = this.lightboxImage.getStyle('height').substring(0, this.lightboxImage.getStyle('height').length - 2)
		if(lightboxImgHeigth < this.origImgHeight) {
			this.resizeLink.show();
			$('resizeLink').stopObserving();
			$('resizeLink').observe('click', (function(event) { event.stop(); this.changeImage(this.activePageImage, false); }).bindAsEventListener(this));
		}
		else if(lightboxImgHeigth > 600) {
			this.resizeLink.show();
			$('resizeLink').stopObserving();
			$('resizeLink').observe('click', (function(event) { event.stop(); this.changeImage(this.activePageImage, true); }).bindAsEventListener(this));
		}
		
        // if not first image in set, display prev image button
        if (this.activePageImage > 0) {
			$('prevLink').stopObserving();
			$('prevLink').observe('click', (function(event) { event.stop(); this.changeImage(this.activePageImage - 1, true); }).bindAsEventListener(this));
			this.prevLink.show();
		}
		else {
			// if not on first page display prev button with ajax reload
			if(this.galArgs['view'] == "split") {
				if(this.activeOffset != 0) {
					$('prevLink').stopObserving();
					if(this.isRandom) {
						$('prevLink').observe('click', (function(event) { event.stop(); this.remoteGallery.updateImages(true, this.activeOffset - 12, true); }).bindAsEventListener(this));
					}
					else {
						$('prevLink').observe('click', (function(event) { event.stop(); this.remoteGallery.updateImages(false, this.activeOffset - 12, true, [this.galArgs['galName'], this.galArgs['album']]); }).bindAsEventListener(this));
					}
					this.prevLink.show();
				}
			}
		}

        // if not last image in set, display next image button 
        if (this.activePageImage < (this.imageCount - 1)) {
			// if on activePageImage is the last one on current page display next image button with ajax reload
			if(this.galArgs['view'] == "split" && this.activePageImage % 11 == 0 && this.activePageImage != 0) {
				$('nextLink').stopObserving();
				if(this.isRandom) {
					$('nextLink').observe('click', (function(event) { event.stop(); this.remoteGallery.updateImages(true, this.activeOffset + 12, false); }).bindAsEventListener(this));
				}
				else {
					$('nextLink').observe('click', (function(event) { event.stop(); this.remoteGallery.updateImages(false, this.activeOffset + 12, false, [this.galArgs['galName'], this.galArgs['album']]); }).bindAsEventListener(this));
				}
			}
			else {
				$('nextLink').stopObserving();
				$('nextLink').observe('click', (function(event) { event.stop(); this.changeImage(this.activePageImage + 1 , true); }).bindAsEventListener(this));
			}
			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 (keycode == escapeKey){ // close lightbox
            this.end();
        } else if ((key == 'p') || (keycode == 37)){ // display previous image
            if (this.activePageImage != 0){
                this.disableKeyboardNav();
                this.changeImage(this.activePageImage - 1);
            }
        } else if ((key == 'n') || (keycode == 39)){ // display next image
            if (this.activePageImage != (this.imageCount - 1)){
                this.disableKeyboardNav();
                this.changeImage(this.activePageImage + 1);
            }
        }
    },

    //
    //  preloadNeighborImages()
    //  Preload previous and next images.
    //
    preloadNeighborImages: function() {
        var preloadNextImage, preloadPrevImage;
        if (this.imageArray.length > this.activePageImage + 1){
            preloadNextImage = new Image();
            preloadNextImage.src = this.imageArray[this.activePageImage + 1][0];
        }
        if (this.activePageImage > 0){
            preloadPrevImage = new Image();
            preloadPrevImage.src = this.imageArray[this.activePageImage - 1][0];
        }
    },
		
	//
	//	activateSlideshow();
	//	Start slideshow
	//
	activateSlideshow: function(handle){
		
			this.slideshowInterval = window.setInterval(handle, 8000);
			this.slideshowActive = true;
			this.slideshowImage.writeAttribute('src', LightboxOptions.fileSlideshowImageStop);
			$('slideshowLink').stopObserving();
			$('slideshowLink').observe('click', (function(event) { event.stop(); this.deactivateSlideshow(); }).bind(this));
	},
	
	//
	//	deactivateSlideshow();
	//	Stop slideshow
	//
	deactivateSlideshow: function() {
		
		window.clearInterval(this.slideshowInterval);
		this.slideshowActive = false;
		this.slideshowImage.writeAttribute('src', LightboxOptions.fileSlideshowImageStart);
		if(this.activePageImage % 11 == 0 && this.activePageImage != 0) {
			$('slideshowLink').observe('click', (function(event) { event.stop(); this.activateSlideshow("myLightbox.remoteGallery.updateRandom(myLightbox.activeOffset + 12, true);"); }).bind(this));
		}
		else {
			$('slideshowLink').observe('click', (function(event) { event.stop(); this.activateSlideshow("myLightbox.changeImage(myLightbox.activePageImage + 1 , true);"); }).bind(this));
		}
	},
	
	getHTTPGetVars: function() {
		HTTP_GET_VARS = new Array();
		this.galArgs = new Array();
		strGET = document.location.search.substr(1,document.location.search.length);
		if(strGET != '') {
			gArr = strGET.split('&');
			for(i=0;i<gArr.length;++i) {
				v = '';
				vArr = gArr[i].split('=');
				if(vArr.length > 1) v = vArr[1];
				HTTP_GET_VARS[unescape(vArr[0])] = unescape(v);
			}
		}
		if(this.isRandom) {
			this.galArgs['view'] = HTTP_GET_VARS['view'] ? "split" : "single";
			this.galArgs['imgid'] = HTTP_GET_VARS['imgid'];
		}
		else {
			this.galArgs['galName'] = HTTP_GET_VARS['galName'];
			this.galArgs['album'] = HTTP_GET_VARS['album'] ? HTTP_GET_VARS['album'] : "";
			this.galArgs['view'] = HTTP_GET_VARS['view'] ? HTTP_GET_VARS['view'] : "split";
		}
	},

    //
    //  end()
    //
    end: function() {
		if(this.slideshowActive) {
			this.deactivateSlideshow();
			this.slideshowPause = false;
		}
        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];
	}
}
	
document.observe('dom:loaded', function () { new Lightbox(); });