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

//

//	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.

//

//	Lightbox v2.03a

//	by Dynamicdrive.com- http://www.dynamicdrive.com

//	Nov 29th, 2007

//	Added ability for the caption ("title" attr of link) to be optionally hyperlinked, by throwing in a "rev" attr containing the desired link

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

/*



	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

//

var fileLoadingImage = "/content/img/lightbox/loading.gif";

var fileBottomNavCloseImage = "/content/img/lightbox/closelabel.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 = {

	

    // 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() {

        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 () {
                    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;
                }

            }

        }



        // 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="outerImageContainer">

        //			<div id="imageContainer">

        //				<img id="lightboxImage">

        //				<div style="" id="hoverNav">

        //					<a href="#" id="prevLink"></a>

        //					<a href="#" id="nextLink"></a>

        //				</div>

        //				<div id="loading">

        //					<a href="#" id="loadingLink">

        //						<img src="images/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 objImageContainer = document.createElement("div");

        objImageContainer.setAttribute('id','imageContainer');

        objOuterImageContainer.appendChild(objImageContainer);

	

        var objLightboxImage = document.createElement("img");

        objLightboxImage.setAttribute('id','lightboxImage');

        objImageContainer.appendChild(objLightboxImage);

	

        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');

        objImageDataContainer.className = 'clearfix';

        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);

	

        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);

	

        var objBottomNavCloseImage = document.createElement("img");

        objBottomNavCloseImage.setAttribute('src', fileBottomNavCloseImage);

        objBottomNavCloseLink.appendChild(objBottomNavCloseImage);

    },

	

    //

    //	start()

    //	Display overlay and lightbox. If image is part of a set, add siblings to imageArray.

    //

    start: function(imageLink) {



        function getImageTitle(anchor){ //DynamicDrive.com added function that allows the caption("title") to be linked ("rev").

            var ddimageTitle=anchor.getAttribute('title')

            var ddimageTitleURL=(ddimageTitle!=null && ddimageTitle!="")? anchor.getAttribute('rev') : null

            return ddimageTitleFinal=(ddimageTitleURL!=null && ddimageTitleURL!="")? '<a href="'+ddimageTitleURL+'" class="ddcaptionurl">'+ddimageTitle+'</a>' : ddimageTitle

        };



        hideSelectBoxes();

        hideFlash();



        // stretch overlay to fill page and fade in

        var arrayPageSize = getPageSize();

        Element.setHeight('overlay', arrayPageSize[1]);



        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'), getImageTitle(imageLink)));

        } 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'), getImageTitle(anchor)));

                }

            }

            imageArray.removeDuplicates();

            while(imageArray[imageNum][0] != imageLink.getAttribute('href')) {
                imageNum++;
            }

        }



        // 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');

		

        this.changeImage(imageNum);

    },



    //

    //	changeImage()

    //	Hide most elements and preload image in preparation for resizing image container.

    //

    changeImage: function(imageNum) {

		

        activeImage = imageNum;	// update global var



        // hide elements during transition

        if(animate){
            Element.show('loading');
        }

        Element.hide('lightboxImage');

        Element.hide('hoverNav');

        Element.hide('prevLink');

        Element.hide('nextLink');

        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)){
            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);
            }

        }



        Element.setHeight('prevLink', imgHeight);

        Element.setHeight('nextLink', imgHeight);

        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() {

	

    Element.show('caption');

    Element.setInnerHTML( 'caption', imageArray[activeImage][1]);

		

    // if image is part of set display 'Image x of x'

    if(imageArray.length > 1){

        Element.show('numberDisplay');

        Element.setInnerHTML( 'numberDisplay', "Fotografija " + eval(activeImage + 1) + " od " + 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();

            }

        }

        );

},



//

//	updateNav()

//	Display appropriate previous and next hover navigation.

//

updateNav: function() {



    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;

        }

    }

		

    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.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();

}

}



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



//

// getPageScroll()

// Returns array with x,y page scroll values.

// Core code from - quirksmode.org

//

function getPageScroll(){



    var yScroll;



    if (self.pageYOffset) {

        yScroll = self.pageYOffset;

    } else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict

        yScroll = document.documentElement.scrollTop;

    } else if (document.body) {// all other Explorers

        yScroll = document.body.scrollTop;

    }



    arrayPageScroll = new Array('',yScroll)

    return arrayPageScroll;

}



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



//

// getPageSize()

// Returns array with page width, height and window width, height

// Core code from - quirksmode.org

// Edit for Firefox by pHaez

//

function getPageSize(){

	

    var xScroll, yScroll;

	

    if (window.innerHeight && window.scrollMaxY) {

        xScroll = document.body.scrollWidth;

        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

        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 = windowWidth;

    } else {

        pageWidth = xScroll;

    }



    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("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();	

}

*/

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

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