(function($){
	
	$.fn.lightBox = function(settings) {
		
		settings = jQuery.extend({
			// Configuration related to overlay
			overlayBgColor: 		'#000',		
			overlayOpacity:			0.8,
			// Configuration related to navigation
			fixedNavigation:		false,	
			// Configuration related to images
			imageLoading:			'img/lightbox-ico-loading.gif',		
			imageBtnPrev:			'img/lightbox-btn-prev.gif',			
			imageBtnNext:			'img/lightbox-btn-next.gif',			
			imageBtnClose:			'img/lightbox-btn-close.gif',	
			imageBlank:				'img/lightbox-blank.gif',	
			// Configuration related to container image box
			containerBorderSize:	10,			
			containerResizeSpeed:	400,	
			// Configuration related to texts in caption. For example: Image 2 of 8. You can alter either "Image" and "of" texts.
			txtImage:				'Immagine',
			txtOf:					'di',		
			// Configuration related to keyboard navigation
			keyToClose:				'c',	
			keyToPrev:				'p',
			keyToNext:				'n',
			// Don´t alter these variables in any way
			imageArray:				[],
			fotoNow:				'',
			activeImage:			0
		},settings);
		
		
		
		function initialize() {
			$('body').css("overflow", "visible");
			// nascondo alcuni elementi che possono dare problemi con IE
			$('embed, object, select').css({ 'visibility' : 'hidden' });
			// creo la struttura html, stili e animazioni
			settoInterfaccia();
			
			// trovo la foto cliccata
			while ( settings.imageArray[settings.activeImage][0] != settings.fotoNow ) {
				settings.activeImage++;
			}
			// vedo l'immagine now
			vedoImmagine();
		}
		
		
		function creoHtml(){
			var testo = "<div id=\"jquery-overlay\"></div>";
			testo += "<div id=\"jquery-lightbox\">";
			testo += "	<div id=\"lightbox-container-image-box\">";
			testo += "		<div id=\"lightbox-container-image\">";
			testo += "			<img id=\"lightbox-image\">";
			testo += "			<div style=\"\" id=\"lightbox-nav\">";
			testo += "				<a href=\"#\" id=\"lightbox-nav-btnPrev\"></a>";
			testo += "				<a href=\"#\" id=\"lightbox-nav-btnNext\"></a>";
			testo += "			</div>";
			testo += "			<div id=\"lightbox-loading\">";
			testo += "				<a href=\"#\" id=\"lightbox-loading-link\">";
			testo += "					<img src=\"" + settings.imageLoading + "\">";
			testo += "				</a>";
			testo += "			</div>";
			testo += "		</div>";
			testo += "	</div>";
			testo += "	<div id=\"lightbox-container-image-data-box\">";
			testo += "		<div id=\"lightbox-container-image-data\">";
			testo += "			<div id=\"lightbox-image-details\">";
			testo += "				<span id=\"lightbox-image-details-caption\"></span>";
			testo += "				<span id=\"lightbox-image-details-currentNumber\"></span>";
			testo += "			</div>";
			testo += "			<div id=\lightbox-secNav\">";
			testo += "				<a href=\"#\" id=\lightbox-secNav-btnClose\">";
			testo += "					<img src= \"" + settings.imageBtnClose + "\">";
			testo += "				</a>";
			testo += "			</div>";
			testo += "		</div>";
			testo += "	</div>";
			testo += "</div>";
			
			return testo;
		}
		
		
		
		
		
		
		
		function settoInterfaccia() {
			// Creo l'hmtl
			var testoHtml = creoHtml();
			$('body').append(testoHtml);	
			
			// Get page sizes
			var arrPageSizes = takeDimensioniPag();
			
			$('#jquery-overlay').css({
				backgroundColor:	settings.overlayBgColor,
				opacity:			settings.overlayOpacity,
				width:				arrPageSizes[2],
				height:				arrPageSizes[3]
			}).fadeIn();
			
			// Get page scroll
			var arrPageScroll = ___getPageScroll();
			// Calculate top and left offset for the jquery-lightbox div object and show it
			$('#jquery-lightbox').css({
				top:	arrPageScroll[1] + (arrPageSizes[3] / 10),
				left:	arrPageScroll[0]
			}).show();
			// Assigning click events in elements to close overlay
			$('#jquery-overlay,#jquery-lightbox').click(function() {
				_finish();									
			});
			// Assign the _finish function to lightbox-loading-link and lightbox-secNav-btnClose objects
			$('#lightbox-loading-link,#lightbox-secNav-btnClose').click(function() {
				_finish();
				return false;
			});
			// If window was resized, calculate the new overlay dimensions
			$(window).resize(function() {
				// Get page sizes
				var arrPageSizes = takeDimensioniPag();
				// Style overlay and show it
				$('#jquery-overlay').css({
					width:		arrPageSizes[2],
					height:		arrPageSizes[3]
				});
				// Get page scroll
				var arrPageScroll = ___getPageScroll();
				// Calculate top and left offset for the jquery-lightbox div object and show it
				$('#jquery-lightbox').css({
					top:	arrPageScroll[1] + (arrPageSizes[3] / 10),
					left:	arrPageScroll[0]
				});
			});
			
		}
		
		
		function ___getPageScroll() {
			var xScroll, yScroll;
			if (self.pageYOffset) {
				yScroll = self.pageYOffset;
				xScroll = self.pageXOffset;
			} else if (document.documentElement && document.documentElement.scrollTop) {	 // Explorer 6 Strict
				yScroll = document.documentElement.scrollTop;
				xScroll = document.documentElement.scrollLeft;
			} else if (document.body) {// all other Explorers
				yScroll = document.body.scrollTop;
				xScroll = document.body.scrollLeft;	
			}
			arrayPageScroll = new Array(xScroll,yScroll);
			return arrayPageScroll;
		};
		
		
		function takeDimensioniPag() {
			var windowWidth = $(window).width();
			var windowHeight = $(window).height();
			var pageWidth = $('body').width();
			var pageHeight = $('body').height();
			
			arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight);
			return arrayPageSize;
		};
		
		
		
		function vedoImmagine() { // show the loading
			// Show the loading
			$('#lightbox-loading').show();
			if ( settings.fixedNavigation ) {
				$('#lightbox-image,#lightbox-container-image-data-box,#lightbox-image-details-currentNumber').hide();
			} else {
				// Hide some elements
				$('#lightbox-image,#lightbox-nav,#lightbox-nav-btnPrev,#lightbox-nav-btnNext,#lightbox-container-image-data-box,#lightbox-image-details-currentNumber').hide();
			}
			// Image preload process
			var objImagePreloader = new Image();
			objImagePreloader.onload = function() {
				$('#lightbox-image').attr('src',settings.imageArray[settings.activeImage][0]);
				// Perfomance an effect in the image container resizing it
				_resize_container_image_box(objImagePreloader.width,objImagePreloader.height);
				//	clear onLoad, IE behaves irratically with animated gifs otherwise
				objImagePreloader.onload=function(){};
			};
			objImagePreloader.src = settings.imageArray[settings.activeImage][0];
		};
		/**
		 * Perfomance an effect in the image container resizing it
		 *
		 * @param integer intImageWidth The image´s width that will be showed
		 * @param integer intImageHeight The image´s height that will be showed
		 */
		function _resize_container_image_box(intImageWidth,intImageHeight) {
			// Get current width and height
			var intCurrentWidth = $('#lightbox-container-image-box').width();
			var intCurrentHeight = $('#lightbox-container-image-box').height();
			// Get the width and height of the selected image plus the padding
			var intWidth = (intImageWidth + (settings.containerBorderSize * 2)); // Plus the image´s width and the left and right padding value
			var intHeight = (intImageHeight + (settings.containerBorderSize * 2)); // Plus the image´s height and the left and right padding value
			// Diferences
			var intDiffW = intCurrentWidth - intWidth;
			var intDiffH = intCurrentHeight - intHeight;
			// Perfomance the effect
			$('#lightbox-container-image-box').animate({ width: intWidth, height: intHeight },settings.containerResizeSpeed,function() { _show_image(); });
			if ( ( intDiffW == 0 ) && ( intDiffH == 0 ) ) {
				if ( $.browser.msie ) {
					___pause(250);
				} else {
					___pause(100);	
				}
			} 
			$('#lightbox-container-image-data-box').css({ width: intImageWidth });
			$('#lightbox-nav-btnPrev,#lightbox-nav-btnNext').css({ height: intImageHeight + (settings.containerBorderSize * 2) });
		};
		
		
		function _show_image() {
			$('#lightbox-loading').hide();
			$('#lightbox-image').fadeIn(function() {
				_show_image_data();
				_set_navigation();
			});
			_preload_neighbor_images();
		};
		/**
		 * Show the image information
		 *
		 */
		function _show_image_data() {
			$('#lightbox-container-image-data-box').slideDown('fast');
			$('#lightbox-image-details-caption').hide();
			if ( settings.imageArray[settings.activeImage][1] ) {
				$('#lightbox-image-details-caption').html(settings.imageArray[settings.activeImage][1]).show();
			}
			// If we have a image set, display 'Image X of X'
			if ( settings.imageArray.length > 1 ) {
				$('#lightbox-image-details-currentNumber').html(settings.txtImage + ' ' + ( settings.activeImage + 1 ) + ' ' + settings.txtOf + ' ' + settings.imageArray.length).show();
			}		
		}
		/**
		 * Display the button navigations
		 *
		 */
		function _set_navigation() {
			$('#lightbox-nav').show();

			// Instead to define this configuration in CSS file, we define here. And it´s need to IE. Just.
			$('#lightbox-nav-btnPrev,#lightbox-nav-btnNext').css({ 'background' : 'transparent url(' + settings.imageBlank + ') no-repeat' });
			
			// Show the prev button, if not the first image in set
			if ( settings.activeImage != 0 ) {
				if ( settings.fixedNavigation ) {
					$('#lightbox-nav-btnPrev').css({ 'background' : 'url(' + settings.imageBtnPrev + ') left 15% no-repeat' })
						.unbind()
						.bind('click',function() {
							settings.activeImage = settings.activeImage - 1;
							vedoImmagine();
							return false;
						});
				} else {
					// Show the images button for Next buttons
					$('#lightbox-nav-btnPrev').unbind().hover(function() {
						$(this).css({ 'background' : 'url(' + settings.imageBtnPrev + ') left 15% no-repeat' });
					},function() {
						$(this).css({ 'background' : 'transparent url(' + settings.imageBlank + ') no-repeat' });
					}).show().bind('click',function() {
						settings.activeImage = settings.activeImage - 1;
						vedoImmagine();
						return false;
					});
				}
			}
			
			// Show the next button, if not the last image in set
			if ( settings.activeImage != ( settings.imageArray.length -1 ) ) {
				if ( settings.fixedNavigation ) {
					$('#lightbox-nav-btnNext').css({ 'background' : 'url(' + settings.imageBtnNext + ') right 15% no-repeat' })
						.unbind()
						.bind('click',function() {
							settings.activeImage = settings.activeImage + 1;
							vedoImmagine();
							return false;
						});
				} else {
					// Show the images button for Next buttons
					$('#lightbox-nav-btnNext').unbind().hover(function() {
						$(this).css({ 'background' : 'url(' + settings.imageBtnNext + ') right 15% no-repeat' });
					},function() {
						$(this).css({ 'background' : 'transparent url(' + settings.imageBlank + ') no-repeat' });
					}).show().bind('click',function() {
						settings.activeImage = settings.activeImage + 1;
						vedoImmagine();
						return false;
					});
				}
			}
			// Enable keyboard navigation
			_enable_keyboard_navigation();
		}
		/**
		 * Enable a support to keyboard navigation
		 *
		 */
		function _enable_keyboard_navigation() {
			$(document).keydown(function(objEvent) {
				_keyboard_action(objEvent);
			});
		}
		/**
		 * Disable the support to keyboard navigation
		 *
		 */
		function _disable_keyboard_navigation() {
			$(document).unbind();
		}
		/**
		 * Perform the keyboard actions
		 *
		 */
		function _keyboard_action(objEvent) {
			// To ie
			if ( objEvent == null ) {
				keycode = event.keyCode;
				escapeKey = 27;
			// To Mozilla
			} else {
				keycode = objEvent.keyCode;
				escapeKey = objEvent.DOM_VK_ESCAPE;
			}
			// Get the key in lower case form
			key = String.fromCharCode(keycode).toLowerCase();
			// Verify the keys to close the ligthBox
			if ( ( key == settings.keyToClose ) || ( key == 'x' ) || ( keycode == escapeKey ) ) {
				_finish();
			}
			// Verify the key to show the previous image
			if ( ( key == settings.keyToPrev ) || ( keycode == 37 ) ) {
				// If we´re not showing the first image, call the previous
				if ( settings.activeImage != 0 ) {
					settings.activeImage = settings.activeImage - 1;
					vedoImmagine();
					_disable_keyboard_navigation();
				}
			}
			// Verify the key to show the next image
			if ( ( key == settings.keyToNext ) || ( keycode == 39 ) ) {
				// If we´re not showing the last image, call the next
				if ( settings.activeImage != ( settings.imageArray.length - 1 ) ) {
					settings.activeImage = settings.activeImage + 1;
					vedoImmagine();
					_disable_keyboard_navigation();
				}
			}
		}
		/**
		 * Preload prev and next images being showed
		 *
		 */
		function _preload_neighbor_images() {
			if ( (settings.imageArray.length -1) > settings.activeImage ) {
				objNext = new Image();
				objNext.src = settings.imageArray[settings.activeImage + 1][0];
			}
			if ( settings.activeImage > 0 ) {
				objPrev = new Image();
				objPrev.src = settings.imageArray[settings.activeImage -1][0];
			}
		}
		/**
		 * Remove jQuery lightBox plugin HTML markup
		 *
		 */
		function _finish() {
			$('#jquery-lightbox').remove();
			$('#jquery-overlay').fadeOut(function() { $('#jquery-overlay').remove(); });
			// Show some elements to avoid conflict with overlay in IE. These elements appear above the overlay.
			$('embed, object, select').css({ 'visibility' : 'visible' });
			$('body').css("overflow", "hidden");
		}
		
		function ___pause(ms) {
			var date = new Date(); 
			curDate = null;
			do { var curDate = new Date(); }
			while ( curDate - date < ms);
		};
		
		return initialize();
	};
})(jQuery);