// -----------------------------------------------------------------------------------
//
//	Lightbox v2.03
//	by Lokesh Dhakar - http://www.huddletogether.com
//	4/9/06
//
//	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.org), Thomas Fuchs(mir.aculo.us), and others.
//
//	Lightbox v2.03a
//	by Dynamicdrive.com- http://www.dynamicdrive.com
//	Nov 29th, 2007
//	Added ability for the caption ("title" attr of link) to be optionally hyperlinked, by throwing in a "rev" attr containing the desired link
// -----------------------------------------------------------------------------------
/*

 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()
 - showFlash()
 - hideFlash()
 - pause()
 - initLightbox()

 Function Calls
 - addLoadEvent(initLightbox)

 */
// -----------------------------------------------------------------------------------
//
//	Configuration
//
var fileLoadingImage = "/portalimages/remanika/loading.gif";
var fileBottomNavCloseImage = "/portalimages/remanika/closelabel.gif";

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

// -----------------------------------------------------------------------------------

//
// Global Variables
//
var imageArray = new Array;
var activeImage;

if (animate == true) {
	overlayDuration = 0.2; // shadow fade in/out duration
	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";
	},
	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 = 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
// - 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');
		var areas = document.getElementsByTagName('area');

		// 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;
				}
			}
		}

		// loop through all area tags
		// todo: combine anchor & area tag loops
		for ( var i = 0; i < areas.length; i++) {
			var area = areas[i];

			var relAttribute = String(area.getAttribute('rel'));

			// use the string.match() method to catch 'lightbox' references in
			// the rel attribute
			if (area.getAttribute('href')
					&& (relAttribute.toLowerCase().match('lightbox'))) {
				area.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();
		}
		objBody.appendChild(objOverlay);

		var objLightbox = document.createElement("div");
		objLightbox.setAttribute('id', 'lightbox');
		objLightbox.style.display = 'none';
		objLightbox.onclick = function(e) { // close Lightbox is user clicks shadow overlay
			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);

		// When Lightbox starts it will resize itself from 250 by 250 to the
		// current image dimension.
		// If animations are turned off, it will be hidden as to prevent a
		// flicker of a
		// white 250 by 250 box.
		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');
		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) {

		function getImageTitle(anchor) { //DynamicDrive.com added function that allows the caption("title") to be linked ("rev").
			var ddimageTitle = anchor.getAttribute('title')
			var ddimageTitleURL = (ddimageTitle != null && ddimageTitle != "") ? anchor
					.getAttribute('rev')
					: ""
			return ddimageTitleFinal = (ddimageTitleURL != null && ddimageTitleURL != "") ? '<a href="'
					+ ddimageTitleURL
					+ '" class="ddcaptionurl">'
					+ ddimageTitle + '</a>'
					: ddimageTitle
		}
		;

		hideSelectBoxes();
		hideFlash();

		// stretch overlay to fill page and fade in
		var arrayPageSize = getPageSize();
		Element.setHeight('overlay', arrayPageSize[1]);

		new Effect.Appear('overlay', {
			duration : overlayDuration,
			from : 0.0,
			to : 0.8
		});

		imageArray = [];
		imageNum = 0;

		if (!document.getElementsByTagName) {
			return;
		}
		var anchors = document.getElementsByTagName('a');

		// if image is NOT part of a set..
		if ((imageLink.getAttribute('rel') == 'lightbox')) {
			// add single image to imageArray
			imageArray.push(new Array(imageLink.getAttribute('href'),
					getImageTitle(imageLink)));
		} 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'),
							getImageTitle(anchor)));
				}
			}
			imageArray.removeDuplicates();
			while (imageArray[imageNum][0] != imageLink.getAttribute('href')) {
				imageNum++;
			}
		}

		// calculate top offset for the lightbox and display 
		var arrayPageScroll = getPageScroll();
		var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 10);

		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
		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();

		// 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];
	},

	//
	// resizeImageContainer()
	//
	resizeImageContainer : function(imgWidth, imgHeight) {

		// get curren width and height
		this.widthCurrent = Element.getWidth('outerImageContainer');
		this.heightCurrent = Element.getHeight('outerImageContainer');

		// get new width and height
		var widthNew = (imgWidth + (borderSize * 2));
		var heightNew = (imgHeight + (borderSize * 2));

		// scalars based on change from old to new
		this.xScale = (widthNew / this.widthCurrent) * 100;
		this.yScale = (heightNew / this.heightCurrent) * 100;

		// calculate size difference between new and old image, and resize if
		// necessary
		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 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', widthNew);

		this.showImage();
	},

	//
	// showImage()
	// Display image and begin preloading neighbors.
	//
	showImage : function() {
		Element.hide('loading');
		new Effect.Appear('lightboxImage', {
			duration : resizeDuration,
			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,
			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()
	// 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;
			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()
	// 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 : overlayDuration
		});
		showSelectBoxes();
		showFlash();
	}
}

// -----------------------------------------------------------------------------------

//
// 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() {
	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("embeds");
	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";
	}

}

// ---------------------------------------------------

//
// pause(numberMillis)
// Pauses code execution for specified time. Uses busy code, not good.
// Help from Ran Bar-On [ran2103@gmail.com]
//

function pause(ms) {
	var date = new Date();
	curDate = null;
	do {
		var curDate = new Date();
	} while (curDate - date < ms);
}
/*
 function pause(numberMillis) {
 var curently = new Date().getTime() + sender;
 while (new Date().getTime();	
 }
 */
// ---------------------------------------------------
function initLightbox() {
	myLightbox = new Lightbox();
}
Event.observe(window, 'load', initLightbox, false);