var fileLoadingImage = "includes/lightbox/images/loading.gif";		
var fileBottomNavCloseImage = "includes/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";
},
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;
}});
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(){	
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: 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: 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;
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(){};
}
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(){
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 xScroll, yScroll;
if(self.pageYOffset){
yScroll = self.pageYOffset;
xScroll = self.pageXOffset;
} else if(document.documentElement && document.documentElement.scrollTop){
yScroll = document.documentElement.scrollTop;
xScroll = document.documentElement.scrollLeft;
} else if(document.body){
yScroll = document.body.scrollTop;
xScroll = document.body.scrollLeft;	
}
arrayPageScroll = new Array(xScroll,yScroll) 
return arrayPageScroll;
}
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){
xScroll = document.body.scrollWidth;
yScroll = document.body.scrollHeight;
}else{
xScroll = document.body.offsetWidth;
yScroll = document.body.offsetHeight;
}
var windowWidth, windowHeight;
if(self.innerHeight){
if(document.documentElement.clientWidth){
windowWidth = document.documentElement.clientWidth; 
}else{
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 = xScroll;		
}else{
pageWidth = windowWidth;
}
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 = "";
}}
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);