(function($){
    $.fn.lightBox = function(settings){
        settings = jQuery.extend({
            overlayBgColor: '#000',
            overlayOpacity: 0.8,
            fixedNavigation: false,
            imageLoading: 'site/js/images/lightbox-ico-loading.gif',
            imageBtnPrev: 'site/js/images/lightbox-btn-prev.gif',
            imageBtnNext: 'site/js/images/lightbox-btn-next.gif',
            imageBtnClose: 'site/js/images/lightbox-btn-close.gif',
            imageBlank: 'site/js/images/lightbox-blank.gif',
            containerBorderSize: 10,
            containerResizeSpeed: 400,
            txtImage: 'Obrazek',
            txtOf: 'z',
            keyToClose: 'c',
            keyToPrev: 'p',
            keyToNext: 'n',
            imageArray: [],
            activeImage: 0
        }, settings);
        var jQueryMatchedObj = this;
        function _initialize(){
            _start(this, jQueryMatchedObj);
            return false;
        }
        function _start(objClicked, jQueryMatchedObj){
            $('embed, object, select').css({
                'visibility': 'hidden'
            });
            _set_interface();
            settings.imageArray.length = 0;
            settings.activeImage = 0;
            if (jQueryMatchedObj.length == 1) {
                settings.imageArray.push(new Array(objClicked.getAttribute('href'), objClicked.getAttribute('title')));
            }
            else {
                for (var i = 0; i < jQueryMatchedObj.length; i++) {
                    settings.imageArray.push(new Array(jQueryMatchedObj[i].getAttribute('href'), jQueryMatchedObj[i].getAttribute('title')));
                }
            }
            while (settings.imageArray[settings.activeImage][0] != objClicked.getAttribute('href')) {
                settings.activeImage++;
            }
            _set_image_to_view();
        }
        function _set_interface(){
            $('body').append('<div id="jquery-overlay"></div><div id="jquery-lightbox"><div id="lightbox-container-image-box"><div id="lightbox-container-image"><img id="lightbox-image"><div style="" id="lightbox-nav"><a href="#" id="lightbox-nav-btnPrev"></a><a href="#" id="lightbox-nav-btnNext"></a></div><div id="lightbox-loading"><a href="#" id="lightbox-loading-link"><img src="' + settings.imageLoading + '"></a></div></div></div><div id="lightbox-container-image-data-box"><div id="lightbox-container-image-data"><div id="lightbox-image-details"><span id="lightbox-image-details-caption"></span><span id="lightbox-image-details-currentNumber"></span></div><div id="lightbox-secNav"><a href="#" id="lightbox-secNav-btnClose"><img src="' + settings.imageBtnClose + '"></a></div></div></div></div>');
            var arrPageSizes = ___getPageSize();
            $('#jquery-overlay').css({
                backgroundColor: settings.overlayBgColor,
                opacity: settings.overlayOpacity,
                width: arrPageSizes[0],
                height: arrPageSizes[1]
            }).fadeIn();
            var arrPageScroll = ___getPageScroll();
            $('#jquery-lightbox').css({
                top: arrPageScroll[1] + (arrPageSizes[3] / 10),
                left: arrPageScroll[0]
            }).show();
            $('#jquery-overlay,#jquery-lightbox').click(function(){
                _finish();
            });
            $('#lightbox-loading-link,#lightbox-secNav-btnClose').click(function(){
                _finish();
                return false;
            });
            $(window).resize(function(){
                var arrPageSizes = ___getPageSize();
                $('#jquery-overlay').css({
                    width: arrPageSizes[0],
                    height: arrPageSizes[1]
                });
                var arrPageScroll = ___getPageScroll();
                $('#jquery-lightbox').css({
                    top: arrPageScroll[1] + (arrPageSizes[3] / 10),
                    left: arrPageScroll[0]
                });
            });
        }
        function _set_image_to_view(){
            $('#lightbox-loading').show();
            if (settings.fixedNavigation) {
                $('#lightbox-image,#lightbox-container-image-data-box,#lightbox-image-details-currentNumber').hide();
            }
            else {
                $('#lightbox-image,#lightbox-nav,#lightbox-nav-btnPrev,#lightbox-nav-btnNext,#lightbox-container-image-data-box,#lightbox-image-details-currentNumber').hide();
            }
            var objImagePreloader = new Image();
            objImagePreloader.onload = function(){
                $('#lightbox-image').attr('src', settings.imageArray[settings.activeImage][0]);
                _resize_container_image_box(objImagePreloader.width, objImagePreloader.height);
                objImagePreloader.onload = function(){
                };
            };
            objImagePreloader.src = settings.imageArray[settings.activeImage][0];
        };
        function _resize_container_image_box(intImageWidth, intImageHeight){
            var intCurrentWidth = $('#lightbox-container-image-box').width();
            var intCurrentHeight = $('#lightbox-container-image-box').height();
            var intWidth = (intImageWidth + (settings.containerBorderSize * 2));
            var intHeight = (intImageHeight + (settings.containerBorderSize * 2));
            var intDiffW = intCurrentWidth - intWidth;
            var intDiffH = intCurrentHeight - intHeight;
            $('#lightbox-container-image-box').animate({
                width: intWidth,
                height: intHeight
            }, settings.containerResizeSpeed, function(){
                _show_image();
            });
            if ((intDiffW == 0) && (intDiffH == 0)) {
                if ($.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();
        };
        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 (settings.imageArray.length > 1) {
                $('#lightbox-image-details-currentNumber').html(settings.txtImage + ' ' + (settings.activeImage + 1) + ' ' + settings.txtOf + ' ' + settings.imageArray.length).show();
            }
        }
        function _set_navigation(){
            $('#lightbox-nav').show();
            $('#lightbox-nav-btnPrev,#lightbox-nav-btnNext').css({
                'background': 'transparent url(' + settings.imageBlank + ') no-repeat'
            });
            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;
                        _set_image_to_view();
                        return false;
                    });
                }
                else {
                    $('#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;
                        _set_image_to_view();
                        return false;
                    });
                }
            }
            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;
                        _set_image_to_view();
                        return false;
                    });
                }
                else {
                    $('#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;
                        _set_image_to_view();
                        return false;
                    });
                }
            }
            _enable_keyboard_navigation();
        }
        function _enable_keyboard_navigation(){
            $(document).keydown(function(objEvent){
                _keyboard_action(objEvent);
            });
        }
        function _disable_keyboard_navigation(){
            $(document).unbind();
        }
        function _keyboard_action(objEvent){
            if (objEvent == null) {
                keycode = event.keyCode;
                escapeKey = 27;
            }
            else {
                keycode = objEvent.keyCode;
                escapeKey = objEvent.DOM_VK_ESCAPE;
            }
            key = String.fromCharCode(keycode).toLowerCase();
            if ((key == settings.keyToClose) || (key == 'x') || (keycode == escapeKey)) {
                _finish();
            }
            if ((key == settings.keyToPrev) || (keycode == 37)) {
                if (settings.activeImage != 0) {
                    settings.activeImage = settings.activeImage - 1;
                    _set_image_to_view();
                    _disable_keyboard_navigation();
                }
            }
            if ((key == settings.keyToNext) || (keycode == 39)) {
                if (settings.activeImage != (settings.imageArray.length - 1)) {
                    settings.activeImage = settings.activeImage + 1;
                    _set_image_to_view();
                    _disable_keyboard_navigation();
                }
            }
        }
        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];
            }
        }
        function _finish(){
            $('#jquery-lightbox').remove();
            $('#jquery-overlay').fadeOut(function(){
                $('#jquery-overlay').remove();
            });
            $('embed, object, select').css({
                'visibility': 'visible'
            });
        }
        function ___getPageSize(){
            var xScroll, yScroll;
            if (window.innerHeight && window.scrollMaxY) {
                xScroll = window.innerWidth + window.scrollMaxX;
                yScroll = window.innerHeight + window.scrollMaxY;
            }
            else 
                if (document.body.scrollHeight > document.body.offsetHeight) {
                    xScroll = document.body.scrollWidth;
                    yScroll = document.body.scrollHeight;
                }
                else {
                    xScroll = document.body.offsetWidth;
                    yScroll = document.body.offsetHeight;
                }
            var windowWidth, windowHeight;
            if (self.innerHeight) {
                if (document.documentElement.clientWidth) {
                    windowWidth = document.documentElement.clientWidth;
                }
                else {
                    windowWidth = self.innerWidth;
                }
                windowHeight = self.innerHeight;
            }
            else 
                if (document.documentElement && document.documentElement.clientHeight) {
                    windowWidth = document.documentElement.clientWidth;
                    windowHeight = document.documentElement.clientHeight;
                }
                else 
                    if (document.body) {
                        windowWidth = document.body.clientWidth;
                        windowHeight = document.body.clientHeight;
                    }
            if (yScroll < windowHeight) {
                pageHeight = windowHeight;
            }
            else {
                pageHeight = yScroll;
            }
            if (xScroll < windowWidth) {
                pageWidth = xScroll;
            }
            else {
                pageWidth = windowWidth;
            }
            arrayPageSize = new Array(pageWidth, pageHeight, windowWidth, windowHeight);
            return arrayPageSize;
        };
        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;
                    }
            arrayPageScroll = new Array(xScroll, yScroll);
            return arrayPageScroll;
        };
        function ___pause(ms){
            var date = new Date();
            curDate = null;
            do {
                var curDate = new Date();
            }
            while (curDate - date < ms);
        };
        return this.unbind('click').click(_initialize);
    };
})(jQuery);