// -----------------------------------------------------------------------------------
//
//	Lightbox v2.03
//	by Lokesh Dhakar - http://www.huddletogether.com
//	4/9/06
//
//	For more information on this script, visit:
//	http://huddletogether.com/projects/lightbox2/
//
//	Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
//	
//	Credit also due to those who have helped, inspired, and made their code available to the public.
//	Including: Scott Upton(uptonic.com), Peter-Paul Koch(quirksmode.org), Thomas Fuchs(mir.aculo.us), and others.
//
//
// -----------------------------------------------------------------------------------
/*

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

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

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

//
//	Configuration
//
// Werden in der HTML Datei gesetzt:
//var lightboxImageCountText = 'Bild %1$s von %2$s';
//vat staticFilesUrl = '';
if (window.staticFilesUrl == undefined) {
    var staticFilesUrl = '/';
}

var fileLoadingImage = "images/modules/lightbox/loading.gif";		
var filePrevImage = "images/modules/lightbox/prev.gif";
var fileNextImage = "images/modules/lightbox/next.gif";
var fileSlideShowStartImage = "images/modules/lightbox/play.gif";
var fileSlideShowStopImage = "images/modules/lightbox/pause.gif";
var fileBottomNavCloseImage = "images/modules/lightbox/close.gif";

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

var borderSize = 10;	//if you adjust the padding in the CSS, you will need to update this variable

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

//
//	Global Variables
//
var imageArray = new Array;
var activeImage;

if(animate == true){
    overlayDuration = 0.2;	// shadow fade in/out duration
    if(resizeSpeed > 10){ resizeSpeed = 10;}
    if(resizeSpeed < 1){ resizeSpeed = 1;}
    resizeDuration = (11 - resizeSpeed) * 0.15;
} else { 
    overlayDuration = 0;
    resizeDuration = 0;
}

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

//
//	Additional methods for Element added by SU, Couloir
//	- further additions by Lokesh Dhakar (huddletogether.com)
//
Object.extend(Element, {
    getWidth: function(element) {
        element = $(element);
        return element.offsetWidth; 
    },
    setWidth: function(element,w) {
        element = $(element);
        element.style.width = w +"px";
    },
    setHeight: function(element,h) {
        element = $(element);
        element.style.height = h +"px";
    },
    setTop: function(element,t) {
        element = $(element);
        element.style.top = t +"px";
    },
    setSrc: function(element,src) {
        element = $(element);
        element.src = src; 
    },
    setHref: function(element,href) {
        element = $(element);
        element.href = href; 
    },
    setInnerHTML: function(element,content) {
        element = $(element);
        element.innerHTML = content;
    }
});

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

//
//	Extending built-in Array object
//	- array.removeDuplicates()
//	- array.empty()
//
Array.prototype.removeDuplicates = function () {
    for(i = 0; i < this.length; i++){
        for(j = this.length-1; j>i; j--){        
            if(this[i][0] == this[j][0]){
                this.splice(j,1);
            }
        }
    }
}

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

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

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

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

Lightbox.prototype = {
    /**
     * Id der aktuellen Bilder Gruppe.
     * 
     * @type    {Number}
     */
    _activeImageGroup: undefined,

    /**
     * Läuft die Diashow.
     * 
     * @type    {Boolean}
     */
    _slideShowRunning: false,

    /**
     * Timeout für die Diashow.
     * 
     * @type    {Number}
     */
    _slideShowTimeout: undefined,



    // initialize()
    // Constructor runs on completion of the DOM loading. Loops through anchor tags looking for 
    // 'lightbox' references and applies onclick events to appropriate links. The 2nd section of
    // 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.initializeAnchors();

        // The rest of this code inserts html at the bottom of the page that looks similar to this:
        //
        //	<div id="overlay"></div>
        //	<div id="lightbox">
        //      <div id="lightboxContainer">
        //		    <div id="outerImageContainer">
        //			    <div id="imageContainer">
        //				    <img id="lightboxImage">
        //				    <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>
        //				    <div id="bottomNav">
        //					    <a href="#" id="prevLink">
        //						    <img src="images/prev.gif">
        //                      </a>
        //					    <a href="#" id="nextLink">
        //						    <img src="images/next.gif">
        //                      </a>
        //					    <a href="#" id="bottomNavClose">
        //						    <img src="images/close.gif">
        //					    </a>
        //                      <br />
        //                      <a href="#" id="slideShowStart">
        //                          <img src="images/slideShowStart.gif">
        //                      </a>
        //                      <a href="#" id="slideShowStop">
        //                          <img src="images/slideShowStop.gif">
        //                      </a>
        //				    </div>
        //			    </div>
        //		    </div>
        //      </div>
        //	</div>


        var objBody = document.getElementsByTagName("body").item(0);
        
        var objOverlay = document.createElement("div");
        objOverlay.setAttribute('id','overlay');
        objOverlay.style.display = 'none';
        objOverlay.onclick = function() { myLightbox.end(); }
        objBody.appendChild(objOverlay);
        
        var objLightbox = document.createElement("div");
        objLightbox.setAttribute('id','lightbox');
        objLightbox.style.display = 'none';
        objLightbox.onclick = function(e) {	// close Lightbox is user clicks shadow overlay
            if (!e) var e = window.event;
            var clickObj = Event.element(e).id;
            if ( clickObj == 'lightbox') {
                myLightbox.end();
            }
        };
        objBody.appendChild(objLightbox);

        var objLightboxContainer = document.createElement("div");
        objLightboxContainer.setAttribute('id','lightboxContainer');
        objLightbox.appendChild(objLightboxContainer);
    
        var objOuterImageContainer = document.createElement("div");
        objOuterImageContainer.setAttribute('id','outerImageContainer');
        objLightboxContainer.appendChild(objOuterImageContainer);

        // When Lightbox starts it will resize itself from 250 by 250 to the current image dimension.
        // If animations are turned off, it will be hidden as to prevent a flicker of a
        // white 250 by 250 box.
        if(animate){
            Element.setWidth('outerImageContainer', 250);
            Element.setHeight('outerImageContainer', 250);			
        } else {
            Element.setWidth('outerImageContainer', 1);
            Element.setHeight('outerImageContainer', 1);			
        }

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

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

        var objImageData = document.createElement("div");
        objImageData.setAttribute('id','imageData');
        objImageDataContainer.appendChild(objImageData);
    
        var objImageDetails = document.createElement("div");
        objImageDetails.setAttribute('id','imageDetails');
        objImageData.appendChild(objImageDetails);
    
        var objCaption = document.createElement("span");
        objCaption.setAttribute('id','caption');
        objImageDetails.appendChild(objCaption);
    
        var objNumberDisplay = document.createElement("span");
        objNumberDisplay.setAttribute('id','numberDisplay');
        objImageDetails.appendChild(objNumberDisplay);
        
        var objBottomNav = document.createElement("div");
        objBottomNav.setAttribute('id','bottomNav');
        objImageData.appendChild(objBottomNav);

        var objPrevLink = document.createElement("a");
        objPrevLink.setAttribute('id','prevLink');
        objPrevLink.setAttribute('href','#');
        objBottomNav.appendChild(objPrevLink);

        var objPrevImage = document.createElement("img");
        objPrevImage.setAttribute('src', staticFilesUrl + filePrevImage);
        objPrevLink.appendChild(objPrevImage);

        var objNextLink = document.createElement("a");
        objNextLink.setAttribute('id','nextLink');
        objNextLink.setAttribute('href','#');
        objBottomNav.appendChild(objNextLink);

        var objNextImage = document.createElement("img");
        objNextImage.setAttribute('src', staticFilesUrl + fileNextImage);
        objNextLink.appendChild(objNextImage);

        var objBottomNavCloseLink = document.createElement("a");
        objBottomNavCloseLink.setAttribute('id','bottomNavClose');
        objBottomNavCloseLink.setAttribute('href','#');
        objBottomNavCloseLink.onclick = function() { myLightbox.end(); return false; }
        objBottomNav.appendChild(objBottomNavCloseLink);

        var objBottomNavCloseImage = document.createElement("img");
        objBottomNavCloseImage.setAttribute('src', staticFilesUrl + fileBottomNavCloseImage);
        objBottomNavCloseLink.appendChild(objBottomNavCloseImage);

        var objBr = document.createElement('br');
        objBottomNav.appendChild(objBr);

        var objSlideShowStartLink = document.createElement('a');
        objSlideShowStartLink.setAttribute('id', 'slideShowStart');
        objSlideShowStartLink.setAttribute('href', '#');
        objSlideShowStartLink.onclick = function() { myLightbox.slideShowStart(); return false; }
        objBottomNav.appendChild(objSlideShowStartLink);

        var objSlideShowStartImage = document.createElement('img');
        objSlideShowStartImage.setAttribute('src', staticFilesUrl + fileSlideShowStartImage);
        objSlideShowStartLink.appendChild(objSlideShowStartImage);

        var objSlideShowStopLink = document.createElement('a');
        objSlideShowStopLink.setAttribute('id', 'slideShowStop');
        objSlideShowStopLink.setAttribute('href', '#');
        objSlideShowStopLink.onclick = function() { myLightbox.slideShowStop(); return false; }
        objBottomNav.appendChild(objSlideShowStopLink);

        var objSlideShowStopImage = document.createElement('img');
        objSlideShowStopImage.setAttribute('src', staticFilesUrl + fileSlideShowStopImage);
        objSlideShowStopLink.appendChild(objSlideShowStopImage);

        Event.observe('lightboxImage', 'click', this.observeDetailImage.bind(this));
    },

    /**
     * Stellt den Effekt bei den Lightbox Links ein.
     */
    initializeAnchors: function() {
        if (!document.getElementsByTagName){ return; }
        var anchors = document.getElementsByTagName('a');
        var areas = document.getElementsByTagName('area');

        // loop through all anchor tags
        for (var i=0; i<anchors.length; i++){
            var anchor = anchors[i];
            
            var relAttribute = String(anchor.getAttribute('rel'));
            
            // use the string.match() method to catch 'lightbox' references in the rel attribute
            if (anchor.getAttribute('href') && (relAttribute.toLowerCase().match('lightbox'))){
                anchor.onclick = function (e) {Event.stop(e||window.event); myLightbox.start(this); return false;}
            }
        }

        // loop through all area tags
        // todo: combine anchor & area tag loops
        for (var i=0; i< areas.length; i++){
            var area = areas[i];
            
            var relAttribute = String(area.getAttribute('rel'));
            
            // use the string.match() method to catch 'lightbox' references in the rel attribute
            if (area.getAttribute('href') && (relAttribute.toLowerCase().match('lightbox'))){
                area.onclick = function () {myLightbox.start(this); return false;}
            }
        }
    },

    /**
     * Kontrolliert ob das Detailansicht Bild angeklickt wurde und ob ein
     * externer Link für das Bild hinterlegt ist.
     */
    observeDetailImage: function() {
        if (CM_ImageGalleryInstance.galleries[this._activeImageGroup].links[activeImage] != undefined) {
            if (!CM_ImageGalleryInstance.galleries[this._activeImageGroup].linkOpenWindow) {
                window.location.href = CM_ImageGalleryInstance.galleries[this._activeImageGroup].links[activeImage];
            } else {
                window.open(CM_ImageGalleryInstance.galleries[this._activeImageGroup].links[activeImage], (new Date()).getTime());
            }
        }
    },

    
    //
    //	start()
    //	Display overlay and lightbox. If image is part of a set, add siblings to imageArray.
    //
    start: function(imageLink) {
        this._slideShowRunning = false;
        window.clearTimeout(this._slideShowTimeout);

        /* 
         * Klassen Namen für unterschiedliche Hintergrundfarben festlegen.
         */
        this._activeImageGroup = imageLink.rel.match(/\[([0-9_]+)\]/)[1];
        $('overlay').setAttribute('className', 'image_gallery_overlay_background_' + this._activeImageGroup);
        $('overlay').setAttribute('class', 'image_gallery_overlay_background_' + this._activeImageGroup);
        $('lightbox').setAttribute('className', 'image_gallery_overlay_' + this._activeImageGroup);
        $('lightbox').setAttribute('class', 'image_gallery_overlay_' + this._activeImageGroup);

        hideSelectBoxes();
        hideFlash();

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

        new Effect.Appear('overlay', { duration: overlayDuration, from: 0.0, to: 0.8 });

        imageArray = [];
        imageNum = 0;		

        if (!document.getElementsByTagName){ return; }
        var anchors = document.getElementsByTagName('a');

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

            // loop through anchors, find other images in set, and add them to imageArray
            for (var i=0; i<anchors.length; i++){
                var anchor = anchors[i];
                if (anchor.getAttribute('href') && (anchor.getAttribute('rel') == imageLink.getAttribute('rel'))){
                    imageArray.push(new Array(anchor.getAttribute('href'), anchor.getAttribute('title')));
                }
            }
            imageArray.removeDuplicates();
            while(imageArray[imageNum][0] != imageLink.getAttribute('href')) { imageNum++;}
        }

        if (
            CM_ImageGalleryInstance.galleries[this._activeImageGroup].linkedPreview &&
            CM_ImageGalleryInstance.galleries[this._activeImageGroup].links[imageNum] != undefined
        ) {
            if (!CM_ImageGalleryInstance.galleries[this._activeImageGroup].linkOpenWindow) {
                window.location.href = CM_ImageGalleryInstance.galleries[this._activeImageGroup].links[imageNum];
            } else {
                window.open(CM_ImageGalleryInstance.galleries[this._activeImageGroup].links[imageNum], (new Date()).getTime());
            }
            return;
        }

        if (
            CM_ImageGalleryInstance.galleries[this._activeImageGroup].slideShow.type == 1 && (
                CM_ImageGalleryInstance.galleries[this._activeImageGroup].slideShow.repeat ||
                imageNum + 1 != imageArray.length
            )
        ) {
            this._slideShowRunning = true;
        }

        // calculate top offset for the lightbox and display 
        var arrayPageScroll = getPageScroll();
        var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 10);

        Element.setTop('lightbox', lightboxTop);
        Element.show('lightbox');

        $('prevLink').firstChild.setAttribute('title', Lightbox.toolTips.prev);
        $('nextLink').firstChild.setAttribute('title', Lightbox.toolTips.next);
        $('bottomNavClose').firstChild.setAttribute('title', Lightbox.toolTips.close);
        $('slideShowStart').firstChild.setAttribute('title', Lightbox.toolTips.play);
        $('slideShowStop').firstChild.setAttribute('title', Lightbox.toolTips.pause);

        this.changeImage(imageNum);
    },

    //
    //	changeImage()
    //	Hide most elements and preload image in preparation for resizing image container.
    //
    changeImage: function(imageNum) {	
        
        activeImage = imageNum;	// update global var
        if (CM_ImageGalleryInstance.galleries[this._activeImageGroup].links[activeImage] != undefined) {
            $('lightboxImage').setStyle({cursor: 'pointer'});
        } else {
            $('lightboxImage').setStyle({cursor: 'auto'});
        }

        // hide elements during transition
        if(animate){ Element.show('loading');}
        Element.hide('lightboxImage');
        Element.hide('imageDataContainer');
        Element.hide('numberDisplay');		
        
        imgPreloader = new Image();
        
        // once image is preloaded, resize image container
        imgPreloader.onload=function(){
            Element.setSrc('lightboxImage', imageArray[activeImage][0]);
            myLightbox.resizeImageContainer(imgPreloader.width, imgPreloader.height);
        }
        imgPreloader.src = imageArray[activeImage][0];
    },

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

        // get curren width and height
        this.widthCurrent = Element.getWidth('outerImageContainer');
        this.heightCurrent = Element.getHeight('outerImageContainer');

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

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

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

        if(!( hDiff == 0)){ new Effect.Scale('outerImageContainer', this.yScale, {scaleX: false, duration: resizeDuration, queue: 'front'}); }
        if(!( wDiff == 0)){
            Element.setStyle('lightboxContainer', {width: '100%', position: 'static'});
            new Effect.Scale(
                'outerImageContainer',
                this.xScale,
                {
                    scaleY: false,
                    delay: resizeDuration,
                    duration: resizeDuration,
                    afterFinish: function() {
                        Element.setWidth( 'lightboxContainer', imgWidth + (borderSize * 2));
                        Position.absolutize('lightboxContainer');
                    }
                }
            );
        }

        // if new and old image are same size and no scaling transition is necessary, 
        // do a quick pause to prevent image flicker.
        if((hDiff == 0) && (wDiff == 0)){
            if (navigator.appVersion.indexOf("MSIE")!=-1){ pause(250); } else { pause(100);} 
        }

        Element.setWidth( 'imageDataContainer', widthNew);

        this.showImage();
    },
    
    //
    //	showImage()
    //	Display image and begin preloading neighbors.
    //
    showImage: function(){
        Element.hide('loading');
        new Effect.Appear('lightboxImage', { duration: resizeDuration, queue: 'end', afterFinish: function(){	myLightbox.updateDetails(); } });
        this.preloadNeighborImages();
    },

    //
    //	updateDetails()
    //	Display caption, image number, and bottom nav.
    //
    updateDetails: function() {
        var width = Element.getWidth('outerImageContainer');
        if (width > 100) {
            width -= 100;
        }
        Element.setWidth('imageDetails', width);

        Element.show('caption');
        Element.setInnerHTML( 'caption', imageArray[activeImage][1]);
        if (CM_ImageGalleryInstance.galleries[this._activeImageGroup].contactLinkTitle != undefined) {
            var target = '';
            if (CM_ImageGalleryInstance.galleries[this._activeImageGroup].linkOpenWindow) {
                target = ' target="_blank"';
            }
            new Insertion.Bottom('caption', '<p class="image_gallery_item_contact_link"><a href="' + CM_ImageGalleryInstance.galleries[this._activeImageGroup].links[activeImage] + '"' + target + '>' + CM_ImageGalleryInstance.galleries[this._activeImageGroup].contactLinkTitle +  '</a></p>');
        }

        // if image is part of set display 'Image x of x' 
        if(imageArray.length > 1){
            Element.show('numberDisplay');
            Element.setInnerHTML( 'numberDisplay', lightboxImageCountText.replace('%1$s', eval(activeImage + 1)).replace('%2$s', imageArray.length));
        }

        myLightbox.updateNav();

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

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

        // if not first image in set, display prev image button
        if(activeImage != 0 && !this._slideShowRunning) {
            Element.show('prevLink');
            document.getElementById('prevLink').onclick = function() {
                myLightbox.changeImage(activeImage - 1); return false;
            }
        } else {
            Element.hide('prevLink');
        }

        // if not last image in set, display next image button
        if(activeImage != (imageArray.length - 1) && !this._slideShowRunning){
            Element.show('nextLink');
            document.getElementById('nextLink').onclick = function() {
                myLightbox.changeImage(activeImage + 1); return false;
            }
        } else {
            Element.hide('nextLink');
        }


        if (CM_ImageGalleryInstance.galleries[this._activeImageGroup].slideShow.type > 0) {
            if (!this._slideShowRunning) {
                if (CM_ImageGalleryInstance.galleries[this._activeImageGroup].slideShow.repeat || activeImage + 1 != imageArray.length) {
                    $('slideShowStart').show();
                } else {
                    $('slideShowStart').hide();
                }
                $('slideShowStop').hide();
            }

            if (this._slideShowRunning) {
                $('slideShowStart').hide();
                $('slideShowStop').show();
            }
        } else {
            $('slideShowStart').hide();
            $('slideShowStop').hide();
        }


        this.enableKeyboardNav();
    },

    //
    //	enableKeyboardNav()
    //
    enableKeyboardNav: function() {
        document.onkeydown = this.keyboardAction; 
    },

    //
    //	disableKeyboardNav()
    //
    disableKeyboardNav: function() {
        document.onkeydown = '';
    },

    //
    //	keyboardAction()
    //
    keyboardAction: function(e) {
        if (e == null) { // ie
            keycode = event.keyCode;
            escapeKey = 27;
        } else { // mozilla
            keycode = e.keyCode;
            escapeKey = e.DOM_VK_ESCAPE;
        }

        key = String.fromCharCode(keycode).toLowerCase();

        if((key == 'x') || (key == 'o') || (key == 'c') || (keycode == escapeKey)){	// close lightbox
            myLightbox.end();
        } else if((key == 'p') || (keycode == 37)){	// display previous image
            if(activeImage != 0 && !myLightbox._slideShowRunning){
                myLightbox.disableKeyboardNav();
                myLightbox.changeImage(activeImage - 1);
            }
        } else if((key == 'n') || (keycode == 39)){	// display next image
            if(activeImage != (imageArray.length - 1) && !myLightbox._slideShowRunning){
                myLightbox.disableKeyboardNav();
                myLightbox.changeImage(activeImage + 1);
            }
        }
    },

    //
    //	preloadNeighborImages()
    //	Preload previous and next images.
    //
    preloadNeighborImages: function(){

        if(imageArray.length > 2 || activeImage == 0){
            var next = activeImage + 1;
            if (next == imageArray.length) {
                next = 0;
            }
            preloadNextImage = new Image();
            preloadNextImage.src = imageArray[next][0];
        }
        if(activeImage > 0){
            preloadPrevImage = new Image();
            preloadPrevImage.src = imageArray[activeImage - 1][0];
        }
    
    },

    //
    //	end()
    //
    end: function() {
        this.slideShowStop();
        this.disableKeyboardNav();
        Element.hide('lightbox');
        new Effect.Fade('overlay', { duration: overlayDuration});
        showSelectBoxes();
        showFlash();
    },



    /**
     * Zeigt das nächste Bild der Diashow an.
     */
    slideShowNext: function() {
        if (activeImage + 1 == imageArray.length) {
            activeImage = -1;
        }

        activeImage++;

        if (activeImage + 1 == imageArray.length && !CM_ImageGalleryInstance.galleries[this._activeImageGroup].slideShow.repeat) {
            this.slideShowStop();
        }

        this.changeImage(activeImage);
    },



    /**
     * Startet die Diashow.
     */
    slideShowStart: function() {
        this._slideShowRunning = true;
        this.slideShowStartTimeout();
        this.updateNav();
    },



    /**
     * Startet den Timeout für das nächste Bild.
     */
    slideShowStartTimeout: function() {
        if (this._slideShowRunning) {
            this._slideShowTimeout = window.setTimeout(this.slideShowNext.bind(this), CM_ImageGalleryInstance.galleries[this._activeImageGroup].slideShow.interval * 1000);
        }
    },



    /**
     * Beendet die Diashow.
     */
    slideShowStop: function() {
        this._slideShowRunning = false;
        window.clearTimeout(this._slideShowTimeout);
        this.updateNav();
    }
}

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

/**
 * Texte für die Tooltipps der Navigation.
 * 
 * @type    {Hash}
 */
Lightbox.toolTips = {
    'prev': '',
    'next': '',
    'close': '',
    'play': '',
    'pause': ''
}

/**
 * Klasse für die Bestimmung der Seitengröße.
 */
var tc_PageSize = function() {};

/**
 * Liefert die Gesamtgröße der Seite.
 * 
 * @return  {Object}    Objekt mit width und height der Seite.
 */
tc_PageSize.getSize = function() {
    var size = tc_PageSize.getVisibleSize();
    var htmlElement = document.getElementsByTagName('html')[0];
    var bodyElement = document.getElementsByTagName('body')[0];

    var height = htmlElement.scrollHeight;
    if (height < size.height) {
        height = size.height;
    }
    if (height < bodyElement.scrollHeight) {
        height = bodyElement.scrollHeight;
    }

    var width = htmlElement.scrollWidth;
    if (width < size.width) {
        width = size.width;
    }
    if (width < bodyElement.scrollWidth) {
        width = bodyElement.scrollWidth;
    }

    return {width: width, height: height};
};

/**
 * Liefert die Größe des sichtbaren Bereichs.
 * 
 * @return  {Object}    Objekt mit width und height des sichtbaren Bereichs.
 */
tc_PageSize.getVisibleSize = function() {
    var htmlElement = document.getElementsByTagName('html')[0];
    if (!window.opera) {
        var width = htmlElement.clientWidth;
        var height = htmlElement.clientHeight;
    } else {
        var height = window.innerHeight;
        var width = window.innerWidth;

        if (htmlElement.clientWidth > width) {
            height -= 16;
        }
        if (htmlElement.clientHeight > height) {
            width -= 16;
        }
    } 

    return {width: width, height: height};
};

tc_PageSize.getVisiblePosition = function() {
    var top = 0;
    var left = 0;

    if (window.pageXOffset === undefined) {
        var html = document.getElementsByTagName('html')[0];
        var body = document.getElementsByTagName('body')[0];

        if (html.scrollTop !== 0) {
            top  = html.scrollTop;
        } else {
            top = body.scrollTop;
        }
        if (html.scrollLeft !== 0) {
            left = html.scrollLeft;
        } else {
            left = body.scrollLeft;
        }
    } else {
        top  = window.pageYOffset;
        left = window.pageXOffset;
    }

    return {'top': top, 'left': left};
};

//
// getPageScroll()
// Returns array with x,y page scroll values.
// Core code from - quirksmode.org
//
function getPageScroll(){
    var scroll = tc_PageSize.getVisiblePosition();
    return [scroll.left, scroll.top];
}

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

//
// getPageSize()
// Returns array with page width, height and window width, height
// Core code from - quirksmode.org
// Edit for Firefox by pHaez
//
function getPageSize(){
    var windowWidth, windowHeight;
    if (self.innerHeight) { // all except Explorer
        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;
    }

    var size = tc_PageSize.getSize();
    return [size.width, size.height, windowWidth, windowHeight];
}

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

//
// getKey(key)
// Gets keycode. If 'x' is pressed then it hides the lightbox.
//
function getKey(e){
    if (e == null) { // ie
        keycode = event.keyCode;
    } else { // mozilla
        keycode = e.which;
    }
    key = String.fromCharCode(keycode).toLowerCase();
    
    if(key == 'x'){
    }
}

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

//
// listenKey()
//
function listenKey () {	document.onkeypress = getKey; }
    
// ---------------------------------------------------

function showSelectBoxes(){
    var selects = document.getElementsByTagName("select");
    for (i = 0; i != selects.length; i++) {
        selects[i].style.visibility = "visible";
    }
}

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

function hideSelectBoxes(){
    var selects = document.getElementsByTagName("select");
    for (i = 0; i != selects.length; i++) {
        selects[i].style.visibility = "hidden";
    }
}

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

function showFlash(){
    var flashObjects = document.getElementsByTagName("object");
    for (i = 0; i != flashObjects.length; i++) {
        flashObjects[i].style.visibility = "visible";
    }

    var flashEmbeds = document.getElementsByTagName("embeds");
    for (i = 0; i != flashEmbeds.length; i++) {
        flashEmbeds[i].style.visibility = "visible";
    }
}

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

function hideFlash(){
    var flashObjects = document.getElementsByTagName("object");
    for (i = 0; i != flashObjects.length; i++) {
        flashObjects[i].style.visibility = "hidden";
    }

    var flashEmbeds = document.getElementsByTagName("embeds");
    for (i = 0; i != flashEmbeds.length; i++) {
        flashEmbeds[i].style.visibility = "hidden";
    }

}


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

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

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



var myLightbox = undefined;

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