(function($){
	$.fn.lightbox = function(options){
		var opts = $.extend({}, $.fn.lightbox.defaults, options);
		return this.each(function(){
			$(this).click(function(){
				initialize();
				start(this);
				return false;
			});
		});
		function initialize() {
			$('#overlay').remove();
			$('#lightbox').remove();
			opts.inprogress = false;
			if(opts.jsonData && opts.jsonData.length > 0) {
				var parser = opts.jsonDataParser ? opts.jsonDataParser : $.fn.lightbox.parseJsonData;
				opts.imageArray = [];
				opts.imageArray = parser(opts.jsonData);
			}
			var outerImage = '<div id="outerImageContainer"><div id="imageContainer"><iframe id="lightboxIframe" /><img id="lightboxImage"><div id="hoverNav"><a href="javascript://" title="' + opts.strings.prevLinkTitle + '" id="prevLink"></a><a href="javascript://" id="nextLink" title="' + opts.strings.nextLinkTitle + '"></a></div><div id="loading"><a href="javascript://" id="loadingLink"><img src="'+opts.fileLoadingImage+'"></a></div></div></div>';
			var imageData = '<div id="imageDataContainer" class="clearfix"><div id="imageData"><div id="imageDetails"><span id="caption"></span><span id="numberDisplay"></span></div><div id="bottomNav">';
			if (opts.displayHelp)
				imageData += '<span id="helpDisplay">' + opts.strings.help + '</span>';
			imageData += '<a href="javascript://" id="bottomNavClose" title="' + opts.strings.closeTitle + '"><img src="'+opts.fileBottomNavCloseImage+'"></a></div></div></div>';
			var string;
			if (opts.navbarOnTop) {
				string = '<div id="overlay"></div><div id="lightbox">' + imageData + outerImage + '</div>';
				$("body").append(string);
				$("#imageDataContainer").addClass('ontop');
			} else {
				string = '<div id="overlay"></div><div id="lightbox">' + outerImage + imageData + '</div>';
				$("body").append(string);
			}
			$("#overlay").click(function(){ end(); }).hide();
			$("#lightbox").click(function(){ end();}).hide();
			$("#loadingLink").click(function(){ end(); return false;});
			$("#bottomNavClose").click(function(){ end(); return false; });
			$('#outerImageContainer').width(opts.widthCurrent).height(opts.heightCurrent);
			$('#imageDataContainer').width(opts.widthCurrent);
			if (!opts.imageClickClose) {
				$("#lightboxImage").click(function(){ return false; });
				$("#hoverNav").click(function(){ return false; });
			}
		};
		function getPageSize() {
			var jqueryPageSize = new Array($(document).width(),$(document).height(), $(window).width(), $(window).height());
			return jqueryPageSize;
		};
		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;
			}
			var arrayPageScroll = new Array(xScroll,yScroll);
			return arrayPageScroll;
		};
		function pause(ms) {
			var date = new Date();
			var curDate = null;
			do{curDate = new Date();}
			while(curDate - date < ms);
		};
		function start(imageLink) {
			$("select, embed, object").hide();
			var arrayPageSize = getPageSize();
			$("#overlay").hide().css({width: '100%', height: arrayPageSize[1]+'px', opacity : opts.overlayOpacity}).fadeIn();
			imageNum = 0;
			if(!opts.jsonData) {
				opts.imageArray = [];
				if(!imageLink.rel || (imageLink.rel == '')){
					opts.imageArray.push(new Array(imageLink.href, opts.displayTitle ? imageLink.title : ''));
				} else {
					$("a").each(function(){
						if(this.href && (this.rel == imageLink.rel)){
							opts.imageArray.push(new Array(this.href, opts.displayTitle ? this.title : ''));
						}
					});
				}
			}
			if(opts.imageArray.length > 1) {
				for(i = 0; i < opts.imageArray.length; i++){
					for(j = opts.imageArray.length-1; j>i; j--){
						if(opts.imageArray[i][0] == opts.imageArray[j][0]){
							opts.imageArray.splice(j,1);
						}
					}
				}
				while(opts.imageArray[imageNum][0] != imageLink.href) { imageNum++;}
			}
			var arrayPageScroll = getPageScroll();
			var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 10);
			var lightboxLeft = arrayPageScroll[0];
			$('#lightbox').css({top: lightboxTop+'px', left: lightboxLeft+'px'}).show();
			if (!opts.slideNavBar)
				$('#imageData').hide();
			changeImage(imageNum);
		};
		function changeImage(imageNum) {
			if(opts.inprogress == false){
				opts.inprogress = true;
				opts.activeImage = imageNum;
				$('#loading').show();
				$('#lightboxImage').hide();
				$('#hoverNav').hide();
				$('#prevLink').hide();
				$('#nextLink').hide();
				if (opts.slideNavBar) {
					$('#imageDataContainer').hide();
					$('#imageData').hide();
					doChangeImage();
				} else {
					doChangeImage();
				}
			}
		};
		function doChangeImage() {
			imgPreloader = new Image();
			imgPreloader.onload=function(){
				var newWidth = imgPreloader.width;
				var newHeight = imgPreloader.height;
				if (opts.fitToScreen) {
					var arrayPageSize = getPageSize();
					var ratio;
					var initialPageWidth = arrayPageSize[2] - 2 * opts.borderSize;
					var initialPageHeight = arrayPageSize[3] - 200;
					var dI = initialPageWidth/initialPageHeight;
					var dP = imgPreloader.width/imgPreloader.height;
					if((imgPreloader.height > initialPageHeight) || (imgPreloader.width > initialPageWidth)){
						if(dI > dP){
							newWidth = parseInt((initialPageHeight/imgPreloader.height) * imgPreloader.width);
							newHeight = initialPageHeight;
						} else {
							newHeight = parseInt((initialPageWidth/imgPreloader.width) * imgPreloader.height);
							newWidth = initialPageWidth;
						}
					}
				}
				$('#lightboxImage').attr('src', opts.imageArray[opts.activeImage][0]).width(newWidth).height(newHeight);
				resizeImageContainer(newWidth, newHeight);
			};
			imgPreloader.src = opts.imageArray[opts.activeImage][0];
		};
		function end() {
			disableKeyboardNav();
			$('#lightbox').hide();
			$('#overlay').fadeOut();
			$('select, object, embed').show();
		};
		function preloadNeighborImages(){
			if(opts.loopImages && opts.imageArray.length > 1) {
				preloadNextImage = new Image();
				preloadNextImage.src = opts.imageArray[(opts.activeImage == (opts.imageArray.length - 1)) ? 0 : opts.activeImage + 1][0]
				
				preloadPrevImage = new Image();
				preloadPrevImage.src = opts.imageArray[(opts.activeImage == 0) ? (opts.imageArray.length - 1) : opts.activeImage - 1][0]
			} else {
				if((opts.imageArray.length - 1) > opts.activeImage){
					preloadNextImage = new Image();
					preloadNextImage.src = opts.imageArray[opts.activeImage + 1][0];
				}
				if(opts.activeImage > 0){
					preloadPrevImage = new Image();
					preloadPrevImage.src = opts.imageArray[opts.activeImage - 1][0];
				}
			}
		};
		function resizeImageContainer(imgWidth, imgHeight) {
			opts.widthCurrent = $("#outerImageContainer").outerWidth();
			opts.heightCurrent = $("#outerImageContainer").outerHeight();
			var widthNew = Math.max(350, imgWidth  + (opts.borderSize * 2));
			var heightNew = (imgHeight  + (opts.borderSize * 2));
			opts.xScale = ( widthNew / opts.widthCurrent) * 100;
			opts.yScale = ( heightNew / opts.heightCurrent) * 100;
			wDiff = opts.widthCurrent - widthNew;
			hDiff = opts.heightCurrent - heightNew;
			$('#imageDataContainer').animate({width: widthNew},opts.resizeSpeed,'linear');
			$('#outerImageContainer').animate({width: widthNew},opts.resizeSpeed,'linear',function(){
				$('#outerImageContainer').animate({height: heightNew},opts.resizeSpeed,'linear',function(){
					showImage();
				});
			});
			if((hDiff == 0) && (wDiff == 0)){
				if (jQuery.browser.msie){ pause(250); } else { pause(100);}
			}
			$('#prevLink').height(imgHeight);
			$('#nextLink').height(imgHeight);
		};
		function showImage() {
			$('#loading').hide();
			$('#lightboxImage').fadeIn("fast");
			updateDetails();
			preloadNeighborImages();
			opts.inprogress = false;
		};
		function updateDetails() {
			$('#numberDisplay').html('');
			if(opts.imageArray[opts.activeImage][1]){
				$('#caption').html(opts.imageArray[opts.activeImage][1]).show();
			}
			if(opts.imageArray.length > 1){
				var nav_html;
				nav_html = opts.strings.image + (opts.activeImage + 1) + opts.strings.of + opts.imageArray.length;
				if (!opts.disableNavbarLinks) {
					if ((opts.activeImage) > 0 || opts.loopImages) {
						nav_html = '<a title="' + opts.strings.prevLinkTitle + '" href="#" id="prevLinkText">' + opts.strings.prevLinkText + "</a>" + nav_html;
					}
					if (((opts.activeImage + 1) < opts.imageArray.length) || opts.loopImages) {
						nav_html += '<a title="' + opts.strings.nextLinkTitle + '" href="#" id="nextLinkText">' + opts.strings.nextLinkText + "</a>";
					}
				}
				$('#numberDisplay').html(nav_html).show();
			}
			if (opts.slideNavBar) {
				$("#imageData").slideDown(opts.navBarSlideSpeed);
			} else {
				$("#imageData").show();
			}
			var arrayPageSize = getPageSize();
			$('#overlay').height(arrayPageSize[1]);
			updateNav();
		};
		function updateNav() {
			if(opts.imageArray.length > 1){
				$('#hoverNav').show();
				if(opts.loopImages) {
					$('#prevLink,#prevLinkText').show().click(function(){
						changeImage((opts.activeImage == 0) ? (opts.imageArray.length - 1) : opts.activeImage - 1); return false;
					});
					$('#nextLink,#nextLinkText').show().click(function(){
						changeImage((opts.activeImage == (opts.imageArray.length - 1)) ? 0 : opts.activeImage + 1); return false;
					});
				} else {
					if(opts.activeImage != 0){
						$('#prevLink,#prevLinkText').show().click(function(){
							changeImage(opts.activeImage - 1); return false;
						});
					}
					if(opts.activeImage != (opts.imageArray.length - 1)){
						$('#nextLink,#nextLinkText').show().click(function(){
							changeImage(opts.activeImage +1); return false;
						});
					}
				}
				enableKeyboardNav();
			}
		};
		function keyboardAction(e) {
			var o = e.data.opts
			var keycode = e.keyCode;
			var escapeKey = 27;
			var key = String.fromCharCode(keycode).toLowerCase();
			if((key == 'x') || (key == 'o') || (key == 'c') || (keycode == escapeKey)){
				end();
			} else if((key == 'p') || (keycode == 37)){
				if(o.loopImages) {
					disableKeyboardNav();
					changeImage((o.activeImage == 0) ? (o.imageArray.length - 1) : o.activeImage - 1);
				} else if(o.activeImage != 0){
					disableKeyboardNav();
					changeImage(o.activeImage - 1);
				}
			} else if((key == 'n') || (keycode == 39)){
				if (opts.loopImages) {
					disableKeyboardNav();
					changeImage((o.activeImage == (o.imageArray.length - 1)) ? 0 : o.activeImage + 1);
				} else if(o.activeImage != (o.imageArray.length - 1)){
					disableKeyboardNav();
					changeImage(o.activeImage + 1);
				}
			}
		};
		function enableKeyboardNav() {
			$(document).bind('keydown', {opts: opts}, keyboardAction);
		};
		function disableKeyboardNav() {
			$(document).unbind('keydown');
		};
	};
	$.fn.lightbox.parseJsonData = function(data) {
		var imageArray = [];
		$.each(data, function(){
			imageArray.push(new Array(this.url, this.title));
		});
		return imageArray;
	};
	$.fn.lightbox.defaults = {
		fileLoadingImage : 'images/loading.gif',
		fileBottomNavCloseImage : 'images/closelabel.gif',
		overlayOpacity : 0.8,
		borderSize : 10,
		imageArray : new Array,
		activeImage : null,
		inprogress : false,
		resizeSpeed : 350,
		widthCurrent: 250,
		heightCurrent: 250,
		xScale : 1,
		yScale : 1,
		displayTitle: true,
		navbarOnTop: false,
		slideNavBar: false,
		navBarSlideSpeed: 350,
		displayHelp: false,
		strings : {
			help: ' \u2190 / P - previous image\u00a0\u00a0\u00a0\u00a0\u2192 / N - next image\u00a0\u00a0\u00a0\u00a0ESC / X - close image gallery',
			prevLinkTitle: 'previous image',
			nextLinkTitle: 'next image',
			prevLinkText:  '&laquo; Previous',
			nextLinkText:  'Next &raquo;',
			closeTitle: 'close image gallery',
			image: 'Image ',
			of: ' of '
		},
		fitToScreen: false,
		disableNavbarLinks: false,
		loopImages: false,
		imageClickClose: true,
		jsonData: null,
		jsonDataParser: null
	};
})(jQuery);