// -----------------------------------------------------------------------------------
//
//	Lightbox v2.03.3
//	by Lokesh Dhakar - http://www.huddletogether.com
//	5/21/06
//
//	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.com), 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()
	- updateImageList()
	- 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
//
var fileLoadingImage = "/img/common/loading.gif";
var fileBottomNavCloseImage = "images/closelabel.gif";

var overlayOpacity = 0.5;	// controls transparency of shadow overlay

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
var textDataDivWidth = 0;
var textDataDivHeight = 0;

var googleAnalyticsTrack = false;

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

//
//	Global Variables
//
var imageArray = new Array;
var activeImage;
var lastTimeOut = null;
var slideShowTimeout = 5000;

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";
	},
	setLeft: function(element,l) {
	   	element = $(element);
    	element.style.left = l +"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 = {
    
    lightboxExtra : 0,

	// 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(resizeSpeedInt) {
		if (resizeSpeedInt)
            resizeDuration = (11 - resizeSpeedInt) * 0.15;
		this.updateImageList();

		// 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 id="lightboxData"></div>
		//				<div style="" id="hoverNav">
		//					<a href="#" id="prevLink"></a>
		//					<a href="#" id="nextLink"></a>
		//				</div>
		//				<div id="loading">
		//					<a href="#" id="loadingLink">
		//						<img src="images/loading.gif">
		//					</a>
		//				</div>
		//			</div>
		//		</div>
		//		<div id="imageDataContainer">
		//			<div id="imageData">
		//				<div id="imageDetails">
		//					<span id="caption"></span>
		//					<span id="numberDisplay"></span>
		//				</div>
		//				<div id="bottomNav">
		//					<a href="#" id="bottomNavClose">
		//						<img src="images/close.gif">
		//					</a>
		//				</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 objOuterImageContainer = document.createElement("div");
		objOuterImageContainer.setAttribute('id','outerImageContainer');
		objLightbox.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 objLightboxExtraData = document.createElement("div");
		objLightboxExtraData.setAttribute('id','lightboxExtraData');
		objOuterImageContainer.appendChild(objLightboxExtraData);

        var objLightboxExtraDataCloseImg = document.createElement("img");
		objLightboxExtraDataCloseImg.setAttribute('src', '/img/common/popup_close.gif');
        objLightboxExtraDataCloseImg.onclick = function() { myLightbox.end(); }
        objLightboxExtraDataCloseImg.style.cursor = 'pointer'; 
        objLightboxExtraDataCloseImg.style.width = '51px'; 
        objLightboxExtraDataCloseImg.style.height = '12px';
		objLightboxExtraData.appendChild(objLightboxExtraDataCloseImg);

		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 objLightboxData = document.createElement("DIV");
		objLightboxData.setAttribute('id','lightboxData');
		objImageContainer.appendChild(objLightboxData);

		var objHoverNav = document.createElement("div");
		objHoverNav.setAttribute('id','hoverNav');
		objImageContainer.appendChild(objHoverNav);

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

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

		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', fileLoadingImage);
		objLoadingLink.appendChild(objLoadingImage);

		var objImageDataContainer = document.createElement("div");
		objImageDataContainer.setAttribute('id','imageDataContainer');
		objLightbox.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);

        if (this.lightboxExtra && !$('imageNav')) {
            var objImageNav = document.createElement("div");
		    objImageNav.setAttribute('id','imageNav');
		    
		    var navImgs = ['first','previous','play','pause','next','last'];
		    var navTable = document.createElement('table');
		    navTable.cellPadding = 0;
		    navTable.cellSpacing = 0;
		    navTable.id = 'nav_container_table';
		    navTable.style.position = 'relative';
		    var navTbody = document.createElement('tbody');
		    var navRow = document.createElement('tr');
		    navImgs.each(function(element) {
		        var td = document.createElement('td');
                var img = document.createElement('img');
                img.id = 'photoslide_nav_' + element;                
		        img.src = '/img/common/erdee.nl/photoslide_nav_' + element + ((element == 'pause') ? '_inactive' : '') + '.gif';
		        img.style.cursor = 'pointer';
		        td.appendChild(img);
		        navRow.appendChild(td);
            });
            navTbody.appendChild(navRow);
            navTable.appendChild(navTbody);
            objImageNav.appendChild(navTable);
		    $('imageDetails').appendChild(objImageNav);
		    $('outerImageContainer').style.border = '0px none';
        }
		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 objBottomNavCloseLink = document.createElement("a");
		objBottomNavCloseLink.setAttribute('id','bottomNavClose');
		objBottomNavCloseLink.setAttribute('href','#');
		objBottomNavCloseLink.onclick = function() { myLightbox.end(); return false; }
		objBottomNav.appendChild(objBottomNavCloseLink);
	},
	

    //
    // 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() {
        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.match(/^lightbox_ajax[^_i]/i))){
                 anchor.onclick = function () { myLightbox.start(this, 1, 1); return false; }
            } else if (anchor.getAttribute('href') && (matches = relAttribute.match(/^lightbox(_extra)?$/i))) { 
                if (relAttribute.match(/^lightbox_extra$/i))
                    this.lightboxExtra = 1;
                anchor.onclick = function () {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;}
            }
        }
    },


    //
    //    start()
    //    Display overlay and lightbox. If image is part of a set, add siblings to imageArray.
    // third parameter define the display state of the bottom balk
    //
    start: function(imageLink, ajaxData) {
        hideBottomBalk = (((arguments) && arguments.length > 2) && arguments[2] == 1) ? 1 : 0;
        hideSelectBoxes();
        hideFlash();

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

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

        imageArray = [];
        imageNum = 0;

        if (!document.getElementsByTagName){ return; }
        var anchors = document.getElementsByTagName( imageLink.tagName);

        // if image is NOT part of a set..
        if((imageLink.getAttribute('rel').match(/^lightbox(_ajax(?:_i)?)?(\|\d+\|\d+\|.+)?$/i))){ /* ajax call or ajax_internal call */
            // 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++;}
        }
        
            try {
                if (!imageArray || (imageArray.length <= 1)) {
                    $imageNav = document.getElementById('imageNav');
                    $imageNav.style.display = 'none';
                }
            } catch ($error) {}

        // calculate top and left offset for the lightbox
        var arrayPageScroll = getPageScroll();
        var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 10);
        var lightboxLeft = arrayPageScroll[0];
        Element.setTop('lightbox', lightboxTop);
        Element.setLeft('lightbox', lightboxLeft);

        Element.show('lightbox');
        if (ajaxData) {
            relAttribute = String(imageLink.getAttribute('rel'));
            if (matches = relAttribute.split('|'))
                this.changeImage(imageNum, ajaxData, matches[1], matches[2], matches[3], imageLink, hideBottomBalk);
        } else {
            this.changeImage(imageNum);
        }
    },

    //
    //    changeImage()
    //    Hide most elements and preload image in preparation for resizing image container.
    //
    changeImage: function(imageNum, ajaxData, ajaxDataDivWidth, ajaxDataDivHeight, ajaxDataTemplateElement, imageLink, hideBottomBalk) {
        activeImage = imageNum;    // update global var

        // hide elements during transition
        if(animate){ Element.show('loading');}
        Element.hide('lightboxImage');
        try {
            Element.hide('hoverNav');
            Element.hide('prevLink');
            Element.hide('nextLink');
        } catch (error) {}
        
        Element.hide('imageDataContainer');
        Element.hide('numberDisplay');

        try {
            obj = $('number_of_photo_div_id');
            obj.parentNode.removeChild(obj);
            
            obj = $('bottom_black_div');
            obj.parentNode.removeChild(obj);
        } catch (error) {}
        
        imgPreloader = new Image();
        if (!ajaxData) {
            Element.hide('lightboxData');
            // once image is preloaded, resize image container
            imgPreloader.onload=function(){
                Element.setSrc('lightboxImage', imageArray[activeImage][0]);
                myLightbox.resizeImageContainer(imgPreloader.width, imgPreloader.height, hideBottomBalk);

                imgPreloader.onload=function(){};    //    clear onLoad, IE behaves irratically with animated gifs otherwise
            }
            if (imageArray[activeImage])
                imgPreloader.src = imageArray[activeImage][0];
    		try {
		        if(googleAnalyticsTrack){
		            if (urchinTracker) {
    			        urchinTracker(imageArray[activeImage][0]);
		            } else if (pageTracker) {
		                pageTracker._trackPageview(imageArray[activeImage][0]);
		            }
		        }
	        } catch(error) {
	        }
        } else {
            Element.show('lightboxData');
            // hide the tab group if available
            if ($('tab_group_container'))
               $('tab_group_container').setStyle({'display':'none'});
            Element.setSrc('lightboxImage', '/img/common/erdee.nl/blank.gif');
            if (navigator.userAgent.match(/^.+\(.+;\s*MSIE\s*6\.[0-9]+.+$/i)) { /* IE6 use other sizes */
                myLightbox.resizeImageContainer(parseInt(ajaxDataDivWidth-100), parseInt(ajaxDataDivHeight), hideBottomBalk);
            } else {
                myLightbox.resizeImageContainer(parseInt(ajaxDataDivWidth), parseInt(ajaxDataDivHeight), hideBottomBalk);
            }
            imgPreloader.onload=function(){};    //    clear onLoad, IE behaves irratically with animated gifs otherwise
            if (ajaxDataTemplateElement.match(/^(~href~|&)/)) { 
                var outputType = 'text';
                if (ajaxDataTemplateElement.match(/^&/)) {
                    var $ajaxParamPairs = ajaxDataTemplateElement.split('&');
                    var $ajaxParams = new Object();
                    for (var $i = 0; $i < $ajaxParamPairs.length; $i++) {
                        if ($matches = $ajaxParamPairs[$i].match(/^([^=]+)(=(.*))?$/))
                            $ajaxParams[$matches[1]] = unescape($matches[3]);
                    }
                    var imageLinkFine = $ajaxParams['href'];
                } else {
                    var imageLinkFine = imageLink.getAttribute('href').replace(/^#/,'');
                }
                var suppressHeader = false;
                if (targetUrlMatches = imageLinkFine.match(/^.+[&\?](?:_[a-z0-9]+-)?output=(text|json|xml)(?:&.+)?$/))
                    outputType = targetUrlMatches[1];
                if (suppressHeaderMatches = imageLinkFine.match(/^.+[&\?]suppressHeader=(false|true)(?:&.+)?$/))
                    suppressHeader = suppressHeaderMatches[1];
          
                if (outputType.match(/text/i)) {
                    new Ajax.Updater('lightboxData', imageLinkFine, { method: 'get', evalScripts: true });
                } else if (outputType.match(/json/)) {
                    new Ajax.Request(imageLinkFine,
                    {
                        method:'get',
                        onSuccess: function(transport){
                            var response = transport.responseText || "no response text";
                            while($('lightboxData').hasChildNodes())
                                $('lightboxData').removeChild($('lightboxData').lastChild);
                            var myObject = eval('(' + response + ')');
                            if ((myObject.header != '') && suppressHeader ==true)
                                $('lightboxData').innerHTML = myObject.header;
                            Element.update($('lightboxData'), myObject.body);
                            // track it
                            try {
                                pageTracker._trackPageview(imageLinkFine);
                            } catch(error) {
                            }
                        },
                        onFailure: function(){}
                    });
                } 
            } else {
                var imageLinkFine = '/ajax_server.php?act=getTemplate&template=' + ajaxDataTemplateElement;
                new Ajax.Updater('lightboxData', imageLinkFine, { method: 'get', evalScripts: true });
                try {
                    pageTracker._trackPageview(imageLinkFine);
                } catch(error) {
                }
            }
        }
    },



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

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

        // 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)){ new Effect.Scale('outerImageContainer', this.xScale, {scaleY: false, delay: resizeDuration, duration: resizeDuration}); }

        // 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);}
        }
        try {
            Element.setHeight('prevLink', imgHeight);
            Element.setHeight('nextLink', imgHeight);
        } catch (error) {}
        if (hideBottomBalk == 1) { 
          Element.setWidth('imageDataContainer', 0);
        } else {
            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() {

       try {
            // if caption is not null
            if(imageArray[activeImage][1]){
                Element.show('caption');
                Element.setInnerHTML( 'caption', imageArray[activeImage][1]);
            }

            // if image is part of set display 'Image x of x'
            if((imageArray.length > 1) && !myLightbox.lightboxExtra) {
                Element.show('numberDisplay');
                Element.setInnerHTML( 'numberDisplay', "Image " + eval(activeImage + 1) + " of " + imageArray.length);
            }

            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.updateNav();
                    if ((imageArray.length > 1) && myLightbox.lightboxExtra) {
                        /* black div on the bottom of the loaded photo */
                        var blackDiv = document.createElement('div');
                	    blackDiv.id = 'bottom_black_div';
                	    blackDiv.innerHTML = '&nbsp;';
                	    $('imageContainer').appendChild(blackDiv);
        	           
            		    var numberOfPhotosDiv = document.createElement('div');
            		    numberOfPhotosDiv.id = 'number_of_photo_div_id';
            		    numberOfPhotosDiv.innerHTML = 'foto ' + eval(activeImage + 1) + ' van ' + imageArray.length;
            		    $('imageContainer').appendChild(numberOfPhotosDiv);
                    }
                    }
                }
            );
        } catch (Exception){}
    },

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

        if (!this.lightboxExtra) {
            Element.show('hoverNav');
            // if not first image in set, display prev image button
            if(activeImage != 0){
                Element.show('prevLink');
                document.getElementById('prevLink').onclick = function() {
                    myLightbox.changeImage(activeImage - 1); return false;
                }
            }
    
            // if not last image in set, display next image button
            if(activeImage != (imageArray.length - 1)){
                Element.show('nextLink');
                document.getElementById('nextLink').onclick = function() {
                    myLightbox.changeImage(activeImage + 1); return false;
                }
            }
        } else {
            try {
                $('hoverNav').remove();
            } catch (error) {};
            /* activate navigate buttons */
            if(activeImage != 0){
                $('photoslide_nav_previous').onclick = function() {
                    myLightbox.stopSlideShow();
                    myLightbox.changeImage(activeImage - 1);
                    return false;
                }
                $('photoslide_nav_first').onclick = function() {
                    myLightbox.stopSlideShow();
                    myLightbox.changeImage(0);
                    return false;
                }
            } else {
                $('photoslide_nav_previous').onclick = null;
                $('photoslide_nav_first').onclick = null;
            }
            if(activeImage != (imageArray.length - 1)){
                $('photoslide_nav_next').onclick = function() {
                    myLightbox.stopSlideShow();
                    myLightbox.changeImage(activeImage + 1); return false;
                }
                $('photoslide_nav_last').onclick = function() {
                    myLightbox.stopSlideShow();
                    myLightbox.changeImage(imageArray.length-1); return false;
                }
            } else {
                $('photoslide_nav_next').onclick = null;
                $('photoslide_nav_last').onclick = null;
            }
            $('photoslide_nav_play').onclick = function() {
                myLightbox.startSlideShow();
                return false;
            }
            $('photoslide_nav_pause').onclick = function() {
                myLightbox.stopSlideShow();
                return false;
            }
            $('photoslide_nav_first').src = '/img/common/erdee.nl/photoslide_nav_first'  + ((activeImage == 0) ? '_inactive' : '') + '.gif';
            $('photoslide_nav_previous').src = '/img/common/erdee.nl/photoslide_nav_previous'  + ((activeImage == 0) ? '_inactive' : '') + '.gif';
            $('photoslide_nav_next').src = '/img/common/erdee.nl/photoslide_nav_next'  + ((activeImage == (imageArray.length - 1)) ? '_inactive' : '') + '.gif';
            $('photoslide_nav_last').src = '/img/common/erdee.nl/photoslide_nav_last'  + ((activeImage == (imageArray.length - 1)) ? '_inactive' : '') + '.gif';
        }
        this.enableKeyboardNav();
    },
    
    
    startSlideShow : function()
    {
        if (activeImage == imageArray.length-1)
            activeImage = 0;
        //lastTimeOut = setTimeout('myLightbox.nextSlide()', slideShowTimeout);
        $('photoslide_nav_play').src = '/img/common/erdee.nl/photoslide_nav_play_inactive.gif';
        $('photoslide_nav_pause').src = '/img/common/erdee.nl/photoslide_nav_pause.gif';
        myLightbox.nextSlide();
    },
    
    nextSlide : function()
    {
        if (activeImage < imageArray.length - 1) {
            activeImage++;
        } else {
            activeImage = 0;
            myLightbox.stopSlideShow();
            myLightbox.end();
            return;
        }
        myLightbox.changeImage(activeImage);
        lastTimeOut = setTimeout('myLightbox.nextSlide()', slideShowTimeout);
    },
    
    stopSlideShow : function()
    {
        if (lastTimeOut)
            clearTimeout(lastTimeOut);
        $('photoslide_nav_play').src = '/img/common/erdee.nl/photoslide_nav_play.gif';
        $('photoslide_nav_pause').src = '/img/common/erdee.nl/photoslide_nav_pause_inactive.gif';
    },

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

    },

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

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

    },

    //
    //    end()
    //
    end: function() {
        this.disableKeyboardNav();
        Element.hide('lightbox');
        new Effect.Fade('overlay', { duration: overlayDuration});
        showSelectBoxes();
        showFlash();
        try {
            $('outerImageContainer').removeChild($('lightboxData'));
        } catch (error) {}
        
        ajaxDataDivWidth = 0;
        ajaxDataDivHeight = 0;
        imgWidth = 0;
        imgHeight = 0;
    }
}

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

//
// getPageScroll()
// Returns array with x,y page scroll values.
// Core code from - quirksmode.com
//
function getPageScroll(){

    var xScroll, yScroll;

    if (self.pageYOffset) {
        yScroll = self.pageYOffset;
        xScroll = self.pageXOffset;
    } else if (document.documentElement && document.documentElement.scrollTop){     // Explorer 6 Strict
        yScroll = document.documentElement.scrollTop;
        xScroll = document.documentElement.scrollLeft;
    } else if (document.body) {// all other Explorers
        yScroll = document.body.scrollTop;
        xScroll = document.body.scrollLeft;
    }

    arrayPageScroll = new Array(xScroll,yScroll)
    return arrayPageScroll;
}

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

//
// getPageSize()
// Returns array with page width, height and window width, height
// Core code from - quirksmode.com
// Edit for Firefox by pHaez
//
function getPageSize(){

    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;

//    console.log(self.innerWidth);
//    console.log(document.documentElement.clientWidth);

    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;
    }

//    console.log("xScroll " + xScroll)
//    console.log("windowWidth " + windowWidth)

    // for small pages with total width less then width of the viewport
    if(xScroll < windowWidth){
        pageWidth = xScroll;
    } else {
        pageWidth = windowWidth;
    }
//    console.log("pageWidth " + pageWidth)

    arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight)
    return arrayPageSize;
}

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

//
// 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("embed");
    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("embed");
    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();
}
*/
// ---------------------------------------------------



function initLightbox() { myLightbox = new Lightbox(9); }
document.observe("dom:loaded", initLightbox);