// -----------------------------------------------------------------------------------
//
//	Lightbox v2.02
//	by Lokesh Dhakar - http://www.huddletogether.com
//	3/31/06
//
//	hacked to use iframe for non-jpeg urls
//	by Tim Morgan - http://timmorgan.org
//	8/9/06
//
//	For more information on this script, visit:
//	http://huddletogether.com/projects/lightbox2/
//	...and...
//	http://mpov.wordpress.com/2006/08/08/lightbox-with-iframes/
//
//	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.
//
//
// -----------------------------------------------------------------------------------
/*
 
 	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()
 	- pause()
 	- initLightbox()
  	
  	Function Calls
  	- addLoadEvent(initLightbox)
  	
  */
  // -----------------------------------------------------------------------------------
 
  //
  //	Configuration
  //
  var fileLoadingImage = "images/loading.gif";		
  var fileBottomNavCloseImage = "images/closelabel.gif";
 
  var iframeWidth = 400;
  var iframeHeight = 600;
  
  var resizeSpeed = 10;	// controls the speed of the image resizing (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(resizeSpeed > 10){ resizeSpeed = 10;}
  if(resizeSpeed < 1){ resizeSpeed = 1;}
  resizeDuration = (11 - resizeSpeed) * 0.15;
 
  // -----------------------------------------------------------------------------------
  
  //
  //	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 = 1; i < this.length; i++){
  		if(this[i][0] == this[i-1][0]){
  			this.splice(i,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');
 
 		// 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;}
 			}
 		}
 
 		// 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(); return false; }
 		objBody.appendChild(objOverlay);
 		
 		var objLightbox = document.createElement("div");
 		objLightbox.setAttribute('id','lightbox');
 		objLightbox.style.display = 'none';
 		objBody.appendChild(objLightbox);
 	
 		var objOuterImageContainer = document.createElement("div");
 		objOuterImageContainer.setAttribute('id','outerImageContainer');
 		objLightbox.appendChild(objOuterImageContainer);
 
 		var objImageContainer = document.createElement("div");
 		objImageContainer.setAttribute('id','imageContainer');
 		objOuterImageContainer.appendChild(objImageContainer);
 			
 		var objLightboxIframe = document.createElement("iframe");
 		objLightboxIframe.setAttribute('id','lightboxIframe');
 		objLightboxIframe.style.width = iframeWidth + 'px';
 		objLightboxIframe.style.height = iframeHeight + 'px';
 		objLightboxIframe.style.border = 'none';
 		objImageContainer.appendChild(objLightboxIframe);
 
 		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) {	
 
 		hideSelectBoxes();
 
 		// stretch overlay to fill page and fade in
 		var arrayPageSize = getPageSize();
 		Element.setHeight('overlay', arrayPageSize[1]);
 		new Effect.Appear('overlay', { duration: 0.2, from: 0.0, to: 0.8 });
 
 		imageArray = [];
 		imageNum = 0;		
 
 		if (!document.getElementsByTagName){ return; }
 		var anchors = document.getElementsByTagName('a');
 		
 		var rel = imageLink.getAttribute('rel');
 
 		// if image is NOT part of a set..
 		if(!rel.match(/\[/)){
 			// add single image to imageArray
 			imageArray.push(new Array(imageLink.getAttribute('href'), imageLink.getAttribute('title')));			
 			if(rel.match(/\|/)) iframeHeight = parseInt(rel.split(/\|/)[1]);
 		} 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++;}
 		}
 
 		// calculate top offset for the lightbox and display 
 		var arrayPageSize = getPageSize();
 		var arrayPageScroll = getPageScroll();
 		var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 15);
 
 		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
 		Element.show('loading');
 		Element.hide('lightboxImage');
 		Element.hide('lightboxIframe');
 		Element.hide('hoverNav');
 		Element.hide('prevLink');
 		Element.hide('nextLink');
 		Element.hide('imageDataContainer');
 		Element.hide('numberDisplay');		
 		
 		if(imageArray[activeImage][0].match(/\.jpg$/)) {
 
 			this.content_is_image = true;
 
 		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];
 
 		} else {
 			this.content_is_image = false;
 			Element.setSrc('lightboxIframe', imageArray[activeImage][0]);
 			myLightbox.resizeImageContainer(iframeWidth, iframeHeight);
 		}
 	},
 
 	//
 	//	resizeImageContainer()
 	//
 	resizeImageContainer: function( imgWidth, imgHeight) {
 		
 		$('lightboxIframe').style.height = iframeHeight + 'px';
 
 		// get current height and width
 		this.wCur = Element.getWidth('outerImageContainer');
 		this.hCur = Element.getHeight('outerImageContainer');
 
 		// scalars based on change from old to new
 		this.xScale = ((imgWidth  + (borderSize * 2)) / this.wCur) * 100;
 		this.yScale = ((imgHeight  + (borderSize * 2)) / this.hCur) * 100;
 
 		// calculate size difference between new and old image, and resize if necessary
 		wDiff = (this.wCur - borderSize * 2) - imgWidth;
 		hDiff = (this.hCur - borderSize * 2) - imgHeight;
 
 		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', imgWidth + (borderSize * 2));
 
 		this.showImage();
 	},
 	
 	//
 	//	showImage()
 	//	Display image and begin preloading neighbors.
 	//
 	showImage: function(){
 		Element.hide('loading');
 		new Effect.Appear(this.content_is_image ? 'lightboxImage' : 'lightboxIframe', { duration: 0.5, 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', "Image " + eval(activeImage + 1) + " of " + imageArray.length);
 		}
 
 		new Effect.Parallel(
 			[ new Effect.SlideDown( 'imageDataContainer', { sync: true, duration: resizeDuration + 0.25, from: 0.0, to: 1.0 }), 
 			  new Effect.Appear('imageDataContainer', { sync: true, duration: 1.0 }) ], 
 			{ duration: 0.65 } 
 		);
 	},
 
 	//
 	//	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;
 		} else { // mozilla
 			keycode = e.which;
 		}
 
 		key = String.fromCharCode(keycode).toLowerCase();
 		
 		if((key == 'x') || (key == 'o') || (key == 'c')){	// close lightbox
 			myLightbox.end();
 		} else if(key == 'p'){	// display previous image
 			if(activeImage != 0){
 				myLightbox.disableKeyboardNav();
 				myLightbox.changeImage(activeImage - 1);
 			}
 		} else if(key == 'n'){	// 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: 0.2});
 		showSelectBoxes();
 	Element.setSrc('lightboxIframe', 'about:blank');
 	}
 	}
 
 // -----------------------------------------------------------------------------------
 
 	//
 // 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(){
 	selects = document.getElementsByTagName("select");
 	for (i = 0; i != selects.length; i++) {
 		selects[i].style.visibility = "visible";
 	}
 }
 
 // ---------------------------------------------------
 
 function hideSelectBoxes(){
 	selects = document.getElementsByTagName("select");
 	for (i = 0; i != selects.length; i++) {
 		selects[i].style.visibility = "hidden";
 	}
 }
 
 // ---------------------------------------------------
 
 //
 // pause(numberMillis)
 // Pauses code execution for specified time. Uses busy code, not good.
 // Code from http://www.faqts.com/knowledge_base/view.phtml/aid/1602
 //
 function pause(numberMillis) {
 	var now = new Date();
 	var exitTime = now.getTime() + numberMillis;
 	while (true) {
 		now = new Date();
 		if (now.getTime() > exitTime)
 			return;
 	}
 }
 
 // ---------------------------------------------------
 
 
 
 function initLightbox() { myLightbox = new Lightbox(); }
 Event.observe(window, 'load', initLightbox, false);