// -----------------------------------------------------------------------------------
//        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.
// -----------------------------------------------------------------------------------
// Configuration
   var overlayOpacity          = 0.8;   // 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 fileLoadingImage        = "/img/lightbox/loading.gif";
   var fileBottomNavCloseImage = "/img/lightbox/closelabel.gif";
// -----------------------------------------------------------------------------------
// Global Variables
   var imageArray = new Array;
   var activeImage;
   if(animate == true){
      overlayDuration = 0.2;
      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.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
   var Lightbox = Class.create();
   Lightbox.prototype = {
      initialize: function() {
                this.updateImageList();
                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) {
                   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);
                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');
                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);
      },
   // updateImageList()
      updateImageList: function() {
                if (!document.getElementsByTagName){ return; }
                var anchors = document.getElementsByTagName('a');
                var areas = document.getElementsByTagName('area');
                for (var i=0; i<anchors.length; i++){
                        var anchor = anchors[i];
                        var relAttribute = String(anchor.getAttribute('rel'));
                        if (anchor.getAttribute('href') && (relAttribute.toLowerCase().match('lightbox'))){ anchor.onclick = function () {myLightbox.start(this); return false;} }
                }
                for (var i=0; i< areas.length; i++){
                        var area = areas[i];
                        var relAttribute = String(area.getAttribute('rel'));
                        if (area.getAttribute('href') && (relAttribute.toLowerCase().match('lightbox'))){ area.onclick = function () {myLightbox.start(this); return false;} }
                }
      },
   // start()
      start: function(imageLink) {
                hideSelectBoxes();
                hideFlash();
                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((imageLink.getAttribute('rel') == 'lightbox')){ imageArray.push(new Array(imageLink.getAttribute('href'), imageLink.getAttribute('title'))); }
                else {
                        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++;}
                }
                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');

                this.changeImage(imageNum);
        },
        changeImage: function(imageNum) {
                activeImage = imageNum;        // update global var
                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();
                imgPreloader.onload=function(){
                        Element.setSrc('lightboxImage', imageArray[activeImage][0]);
                        myLightbox.resizeImageContainer(imgPreloader.width, imgPreloader.height);

                        imgPreloader.onload=function(){};        //        clear onLoad, IE behaves irratically with animated gifs otherwise
                }
                imgPreloader.src = imageArray[activeImage][0];
        },
        resizeImageContainer: function( imgWidth, imgHeight) {
                this.widthCurrent = Element.getWidth('outerImageContainer');
                this.heightCurrent = Element.getHeight('outerImageContainer');
                var widthNew = (imgWidth  + (borderSize * 2));
                var heightNew = (imgHeight  + (borderSize * 2));
                this.xScale = ( widthNew / this.widthCurrent) * 100;
                this.yScale = ( heightNew / this.heightCurrent) * 100;
                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((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: function(){
                Element.hide('loading');
                new Effect.Appear('lightboxImage', { duration: resizeDuration, queue: 'end', afterFinish: function(){        myLightbox.updateDetails(); } });
                this.preloadNeighborImages();
        },
        updateDetails: function() {
                if(imageArray[activeImage][1]){
                        Element.show('caption');
                        Element.setInnerHTML( 'caption', imageArray[activeImage][1]);
                }
                if(imageArray.length > 1){
                        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();
                                }
                        }
                );
        },
        updateNav: function() {
                Element.show('hoverNav');
                if(activeImage != 0){
                        Element.show('prevLink');
                        document.getElementById('prevLink').onclick = function() {
                                myLightbox.changeImage(activeImage - 1); return false;
                        }
                }
                if(activeImage != (imageArray.length - 1)){
                        Element.show('nextLink');
                        document.getElementById('nextLink').onclick = function() {
                                myLightbox.changeImage(activeImage + 1); return false;
                        }
                }

                this.enableKeyboardNav();
        },
        enableKeyboardNav: function() {
                document.onkeydown = this.keyboardAction;
        },
        disableKeyboardNav: function() {
                document.onkeydown = '';
        },
        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: 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: function() {
                this.disableKeyboardNav();
                Element.hide('lightbox');
                new Effect.Fade('overlay', { duration: overlayDuration});
                showSelectBoxes();
                showFlash();
        }
}
// -----------------------------------------------------------------------------------
// getPageScroll()
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()
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;
        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;
        }
        if(yScroll < windowHeight){ pageHeight = windowHeight;  }
        else { pageHeight = yScroll; }
        if(xScroll < windowWidth){ pageWidth = xScroll; }
        else {  pageWidth = windowWidth; }
        arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight)
        return arrayPageSize;
}
// -----------------------------------------------------------------------------------
// getKey(key)
function getKey(e){
        if (e == null) {  keycode = event.keyCode; }
        else { 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";
        }
}
// ---------------------------------------------------
function pause(ms){
        var date = new Date();
        curDate = null;
        do{var curDate = new Date();}
        while( curDate - date < ms);
}
// ---------------------------------------------------
function initLightbox() { myLightbox = new Lightbox(); }
Event.observe(window, 'load', initLightbox, false);