var fileLoadingImage = "/jscript/lightbox/images/loading.gif";
var fileBottomNavCloseImage = "/jscript/lightbox/images/closelabel.gif";
var overlayOpacity = 0.8;
var animate = true;
var resizeSpeed = 7;
var borderSize = 10;
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;
}
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;
    }
});
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();
    }
}
var Lightbox = Class.create();
Lightbox.prototype = {
    initialize: 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;}
            }
        }
        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);
    },
    start: function(imageLink) {
        hideSelectBoxes();
        hideFlash();
        var arrayPageSize = getPageSize();
        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);
        Element.setTop('lightbox', lightboxTop);
        Element.show('lightbox');
        this.changeImage(imageNum);
    },
    changeImage: function(imageNum) {
        activeImage = imageNum;
        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.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() {
        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() {
                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) {
            keycode = event.keyCode;
            escapeKey = 27;
        } else {
            keycode = e.keyCode;
            escapeKey = e.DOM_VK_ESCAPE;
        }
        key = String.fromCharCode(keycode).toLowerCase();
        if((key == 'x') || (key == 'o') || (key == 'c') || (keycode == escapeKey)){
            myLightbox.end();
        } else if((key == 'p') || (keycode == 37)){
            if(activeImage != 0){
                myLightbox.disableKeyboardNav();
                myLightbox.changeImage(activeImage - 1);
            }
        } else if((key == 'n') || (keycode == 39)){
            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();
    }
}
function getPageScroll(){
    var yScroll;
    if (self.pageYOffset) {
        yScroll = self.pageYOffset;
    } else if (document.documentElement && document.documentElement.scrollTop){
        yScroll = document.documentElement.scrollTop;
    } else if (document.body) {
        yScroll = document.body.scrollTop;
    }
    arrayPageScroll = new Array('',yScroll)
    return arrayPageScroll;
}
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){
        xScroll = document.body.scrollWidth;
        yScroll = document.body.scrollHeight;
    } else {
        xScroll = document.body.offsetWidth;
        yScroll = document.body.offsetHeight;
    }
    var windowWidth, windowHeight;
    if (self.innerHeight) {
        windowWidth = self.innerWidth;
        windowHeight = self.innerHeight;
    } else if (document.documentElement && document.documentElement.clientHeight) {
        windowWidth = document.documentElement.clientWidth;
        windowHeight = document.documentElement.clientHeight;
    } else if (document.body) {
        windowWidth = document.body.clientWidth;
        windowHeight = document.body.clientHeight;
    }
    if(yScroll < windowHeight){
        pageHeight = windowHeight;
    } else {
        pageHeight = yScroll;
    }
    if(xScroll < windowWidth){
        pageWidth = windowWidth;
    } else {
        pageWidth = xScroll;
    }
    arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight)
    return arrayPageSize;
}
function getKey(e){
    if (e == null) {
        keycode = event.keyCode;
    } else {
        keycode = e.which;
    }
    key = String.fromCharCode(keycode).toLowerCase();
    if(key == 'x'){
    }
}
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("embeds");
    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);