// -----------------------------------------------------------------------------------
//
//	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 = "scripts/images/closelabel.gif";

var iframeWidth = 500;
var iframeHeight = 530;

var resizeSpeed = 7;	// 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';
   		objLightboxIframe.style.overflow = 'hidden';
   		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);