LightboxOptions = Object.extend({
    fileLoadingImage:        'system/8loader.gif',     
    fileBottomNavCloseImage: 'system/btn_close.png',
		previous: 'system/btn_previous.png',
		next: 'system/btn_next.png',
		white: 'system/btn_empty_nav.png',

    overlayOpacity: 1,   // controls transparency of shadow overlay

    animate: true,         // toggles resizing animations
    resizeSpeed: 10,        // controls the speed of the image resizing animations (1=slowest and 10=fastest)

    borderSize: 0,         //if you adjust the padding in the CSS, you will need to update this variable

	// When grouping images this is used to write: Image # of #.
	// Change it for non-english localization
	labelImage: "Image",
	labelOf: "of"
}, window.LightboxOptions || {});

preimgw = 0;
preimgh = 0;
// -----------------------------------------------------------------------------------
var myarray=null;
var Lightbox = Class.create();
Lightbox.prototype = {
    imageArray: [],
    activeImage: undefined,
    
    // initialize()
    // Constructor runs on completion of the DOM loading. Calls updateImageList and then
    // the function inserts html at the bottom of the page which is used to display the shadow 
    // overlay and the image container.
    //
    initialize: function() {    
        
        this.updateImageList();
        
        this.keyboardAction = this.keyboardAction.bindAsEventListener(this);

        if (LightboxOptions.resizeSpeed > 10) LightboxOptions.resizeSpeed = 10;
        if (LightboxOptions.resizeSpeed < 1)  LightboxOptions.resizeSpeed = 1;

	    this.resizeDuration = LightboxOptions.animate ? ((11 - LightboxOptions.resizeSpeed) * 0.15) : 0;
	    this.overlayDuration = LightboxOptions.animate ? 0.2 : 0;  // shadow fade in/out duration

        // 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.
//        var size = (LightboxOptions.animate ? 250 : 1) + 'px';
        

        // 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 = $$('body')[0];

		objBody.appendChild(Builder.node('div',{id:'overlay'}));
		objBody.appendChild(Builder.node('input', {type: 'hidden', id: 'hidden', value: '0px'}));
        objBody.appendChild(Builder.node('div',{id:'lightbox'}, [
            Builder.node('div',{id:'outerImageContainer'}, 
                Builder.node('div',{id:'imageContainer'}, [
                    Builder.node('img',{id:'lightboxImage'}), 
                    Builder.node('div',{id:'loading'}, 
                        Builder.node('a',{id:'loadingLink', href: '#' }, 
                            Builder.node('img', {src: LightboxOptions.fileLoadingImage})
                        )
                    )
                ])
            ),
            Builder.node('div', {id:'imageDataContainer'},
                Builder.node('div',{id:'imageData'}, [
										Builder.node('div',{id:'firstData'}, [
											Builder.node('div',{id:'imageDetails'}, [	
													Builder.node('div',{id:'imageTitle'}),
													Builder.node('div',{id:'imageAuthor'})
											]),
											Builder.node('div',{id:'imageTags'}
											),
										]),
										Builder.node('div',{id:'Nav'}, [
											Builder.node('div',{id:'preNav'}, [																	
												Builder.node('a',{id:'previous', href: '#' },
													Builder.node('img', { src: LightboxOptions.previous })		
												),
												Builder.node('a',{id:'previouswhite', href: '#' },
													Builder.node('img', { src: LightboxOptions.white })		
												),
											]),
											Builder.node('div',{id:'nextNav'}, [
												Builder.node('a',{id:'next', href: '#', onfocus:"this.blur()" },
													Builder.node('img', { src: LightboxOptions.next, id: 'nextimg' })		
												),
												Builder.node('a',{id:'nextwhite', href: '#', onfocus:"this.blur()" },
													Builder.node('img', { src: LightboxOptions.white, id: 'previousimg' })		
												),
											]),
											Builder.node('a',{id:'bottomNavClose', href: '#', onfocus:"this.blur()"},
													Builder.node('img', { src: LightboxOptions.fileBottomNavCloseImage })
											),
										]),
										Builder.node('div',{id: 'imageComments'}
										)
										
                ])
            )
        ]));


		$('overlay').hide().observe('click', (function() { this.end(); }).bind(this));
		$('lightbox').hide().observe('click', (function(event) { if (event.element().id == 'lightbox') this.end(); }).bind(this));
		//$('outerImageContainer').setStyle({ width: size, height: size });
		
		$('previous').observe('click', (function(event) { event.stop(); this.changeImage(this.activeImage - 1); }).bindAsEventListener(this));
		$('next').observe('click', (function(event) { event.stop(); this.changeImage(this.activeImage + 1); }).bindAsEventListener(this));
		$('loadingLink').observe('click', (function(event) { event.stop(); this.end(); }).bind(this));
		$('bottomNavClose').observe('click', (function(event) { event.stop(); this.end(); }).bind(this));
		$('imageDataContainer').hide();
        var th = this;
        (function(){
            var ids = 
                'overlay lightbox outerImageContainer imageContainer lightboxImage loading loadingLink ' + 
                'imageDataContainer imageData previouswhite nextwhite next previous imageDetails imageTitle imageAuthor imageTags imageComments bottomNavClose';   
            $w(ids).each(function(id){ th[id] = $(id); });
        }).defer();
    },

    //
    // updateImageList()
    // Loops through anchor tags looking for 'lightbox' references and applies onclick
    // events to appropriate links. You can rerun after dynamically adding images w/ajax.
    //
    updateImageList: function() {   
        this.updateImageList = Prototype.emptyFunction;
        document.observe('click', (function(event){
            var target = event.findElement('a[rel^=lightbox]') || event.findElement('area[rel^=lightbox]');
						
						
						
						
            if (target) {		
                event.stop();
                this.start(target);
            }
        }).bind(this));
    },
    
    //
    //  start()
    //  Display overlay and lightbox. If image is part of a set, add siblings to imageArray.
    //
    start: function(imageLink) {    

        $$('select', 'object', 'embed').each(function(node){ node.style.visibility = 'hidden' });

        // stretch overlay to fill page and fade in
        var arrayPageSize = this.getPageSize();
//        $('overlay').setStyle({ width: arrayPageSize[0] + 'px', height: arrayPageSize[1] + 'px' });

        this.overlay.show()

        this.imageArray = new Array();
        var imageNum = 0;
				
			  if ((imageLink.rel == 'lightbox')){
            // if image is NOT part of a set, add single image to imageArray
            this.imageArray.push([imageLink.href, imageLink.title]);         
        } else {
            // if image is part of a set..
            this.imageArray = 
                $$(imageLink.tagName + '[href][rel="' + imageLink.rel + '"]').
                collect(function(anchor){ return [anchor.href, anchor.title]; }).
                uniq();
            
            while (this.imageArray[imageNum][0] != imageLink.href) { imageNum++; }
        }

//while (this.imageArray[imageNum][0] != imageLink.href) { imageNum++; }
				
				/*
				url = imageLink.href.split(imageLink.title)[0];
				name = imageLink.title.substring(0, imageLink.title.length - 3);
				
				length = $$(imageLink.tagName + '[href][rel="' + imageLink.rel + '"]').collect(function(anchor){ return [anchor.href, anchor.title]; }).uniq().length;
				
				for (var i = 2; i <= length; i++)
				{
					for (var j = 0; j < this.array.length; j++)
					{
						if (i < 10)
						{
							if (url+name+'00'+i+".jpg" == array[j][0])
								this.imageArray.push([url+name+'00'+i+".jpg", name+"00"+i]);
						}
						else if (i < 100)
						{
							if (url+name+'0'+i+".jpg" == array[j][0])
								this.imageArray.push([url+name+'0'+i+".jpg", name+"0"+i]);
						}
						else if (i < 1000)
						{
							if (url+name+i+".jpg" == array[j][0])
								this.imageArray.push([url+name+i+".jpg", name+i]);
						}
					}
				}
				*/

        // calculate top and left offset for the lightbox 
        var arrayPageScroll = document.viewport.getScrollOffsets();
        var lightboxTop = arrayPageScroll[1] + (document.viewport.getHeight() / 10);
        var lightboxLeft = arrayPageScroll[0];
        this.lightbox.setStyle({ top: '0px'}).show();
        
        this.changeImage(imageNum);
    },

    //
    //  changeImage()
    //  Hide most elements and preload image in preparation for resizing image container.
    //
    changeImage: function(imageNum) {   
        
        this.activeImage = imageNum; // update global var

        // hide elements during transition
        if (LightboxOptions.animate)
				{
					this.imageDataContainer.hide();
					this.loading.show();
				}
        this.lightboxImage.hide();
		// HACK: Opera9 does not currently support scriptaculous opacity and appear fx
        
        var imgPreloader = new Image();
        
/*				
				if (this.activeImage == this.imageArray.length)
					this.next.hide();
									
				if (this.activeImage == 1)
					this.previous.hide();
        // once image is preloaded, resize image container

*/
        imgPreloader.onload = (function(){
            this.lightboxImage.src = this.imageArray[this.activeImage][0];
            this.resizeImageContainer(imgPreloader.width, imgPreloader.height);
        }).bind(this);
        imgPreloader.src = this.imageArray[this.activeImage][0];
    },

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

        // get current width and height
        var widthCurrent  = this.outerImageContainer.getWidth();
        var heightCurrent = this.outerImageContainer.getHeight();

        // get new width and height
        var widthNew  = (imgWidth  + LightboxOptions.borderSize * 2);
        var heightNew = (imgHeight + LightboxOptions.borderSize * 2);
				
				if(typeof( window.innerWidth ) == 'number' ) 
				{
					if (imgHeight < window.innerHeight)
						$('outerImageContainer').style.marginTop = ((window.innerHeight - imgHeight) / 2) + "px";
					else
					{
						$('outerImageContainer').style.marginTop = "30px";
						$('overlay').style.height = imgHeight + 30 + "px";
					}
					
					if ((imgWidth + 210) < window.innerWidth)
						$('outerImageContainer').style.marginLeft = ((window.innerWidth - (imgWidth + 180)) / 2) + "px";
					else
					{
						$('overlay').style.width = imgWidth + 30 + 180 + "px";
						$('outerImageContainer').style.marginLeft = "30px";
					}
				} 
				else if( document.documentElement && document.documentElement.clientHeight) 
				{
					if (imgHeight < document.documentElement.clientHeight)
						$('outerImageContainer').style.marginTop = ((document.documentElement.clientHeight - imgHeight) / 2) + "px";
					else
						$('outerImageContainer').style.marginTop = "30px";
					if ((imgWidth + 210) < document.documentElement.clientWidth)
						$('outerImageContainer').style.marginLeft = ((document.documentElement.clientWidth - (imgWidth + 180)) / 2) + "px";
					else
						$('outerImageContainer').style.marginLeft = "30px";
				}
				
				$('imageDataContainer').style.marginTop = parseInt($('outerImageContainer').style.marginTop.replace("px", "")) + 100 + "px";
				$('imageDataContainer').style.marginLeft = parseInt($('outerImageContainer').style.marginLeft.replace("px", "")) + imgWidth + "px";
//				$('imageComments').style.bottom = imgWidth + parseInt($('outerImageContainer').style.marginTop.replace("px", "")) + "px";			
				
				$('hidden').value = imgHeight + " " + imgWidth;
				
        // scalars based on change from old to new
        var xScale = (widthNew  / widthCurrent)  * 100;
        var yScale = (heightNew / heightCurrent) * 100;

        // calculate size difference between new and old image, and resize if necessary
        var wDiff = widthCurrent - widthNew;
        var hDiff = heightCurrent - heightNew;

        if (hDiff != 0) new Effect.Scale(this.outerImageContainer, yScale, {scaleX: false, duration: this.resizeDuration, queue: 'front'}); 
        if (wDiff != 0) new Effect.Scale(this.outerImageContainer, xScale, {scaleY: false, duration: this.resizeDuration, delay: this.resizeDuration}); 

        // if new and old image are same size and no scaling transition is necessary, 
        // do a quick pause to prevent image flicker.
        var timeout = 0;
        if ((hDiff == 0) && (wDiff == 0)){
            timeout = 100;
            if (Prototype.Browser.IE) timeout = 250;   
        }

        (function(){
            this.imageDataContainer.setStyle({ height: (heightNew - 100) + 'px' });

            this.showImage();
        }).bind(this).delay(timeout / 1000);
    },
    
    //
    //  showImage()
    //  Display image and begin preloading neighbors.
    //
    showImage: function(){
        this.loading.hide();
        new Effect.Appear(this.lightboxImage, { 
						duration: 0.2,
            queue: 'end', 
        });
				new Effect.Appear(this.updateDetails(), {
						duration: 2,
						queue: 'end'
				});
        this.preloadNeighborImages();
    },

    //
    //  updateDetails()
    //  Display caption, image number, and bottom nav.
    //
    updateDetails: function() {
			
				if (this.activeImage == 0) 
				{
					this.previous.hide();
					this.previouswhite.show();
				}
				else 
				{
					this.previous.show();
					this.previouswhite.hide();
				}
				if (this.activeImage == this.imageArray.length - 1)
				{
					this.next.hide();
					this.nextwhite.show();
				}
				else
				{
					this.next.show();
					this.nextwhite.hide();
				}
				
				if (!window.innerHeight)
				{
					$('imageTags').style.marginLeft = '-10px';
					$('imageTags').style.marginTop = "40px";
				}
				
				
				
        // if caption is not null
				name = "";
        name = this.imageArray[this.activeImage][1];
				
				author = "";
				tags = "";
				comments = "";
				title = "";
				
					var title = $(name+'_title').value;
					var author = $(name+'_author').value;
					var tags = $(name+'_tags').value;
					var comments = $(name+'_comments').value;
				
					if (title == "")
						this.imageTitle.update("<br/>").show();
					else
            this.imageTitle.update(title).show();
					if (author == "")
						this.imageAuthor.update("<br/>").show();
					else
            this.imageAuthor.update(author).show();
					if (tags == "<br/>" || tags == "")
						this.imageTags.update("").show();
					else
						this.imageTags.update(tags).show();
          this.imageComments.update(comments).show();

        new Effect.Parallel(
            [ 
                new Effect.Appear(this.imageDataContainer, { duration: 0.5 })
            ], 
            { 
                afterFinish: (function() {
	                // update overlay size and update nav
	                var arrayPageSize = this.getPageSize();
	                this.updateNav();
                }).bind(this)
            } 
        );
    },

    //
    //  updateNav()
    //  Display appropriate previous and next hover navigation.
    //
    updateNav: function() {            
        this.enableKeyboardNav();
    },

    //
    //  enableKeyboardNav()
    //
    enableKeyboardNav: function() {
        document.observe('keydown', this.keyboardAction); 
    },

    //
    //  disableKeyboardNav()
    //
    disableKeyboardNav: function() {
        document.stopObserving('keydown', this.keyboardAction); 
    },

    //
    //  keyboardAction()
    //
    keyboardAction: function(event) {
        var keycode = event.keyCode;

        var escapeKey;
        if (event.DOM_VK_ESCAPE) {  // mozilla
            escapeKey = event.DOM_VK_ESCAPE;
        } else { // ie
            escapeKey = 27;
        }

        var key = String.fromCharCode(keycode).toLowerCase();
        
        if (key.match(/x|o|c/) || (keycode == escapeKey)){ // close lightbox
            this.end();
        } else if ((key == 'p') || (keycode == 37)){ // display previous image
            if (this.activeImage != 0){
                this.disableKeyboardNav();
                this.changeImage(this.activeImage - 1);
            }
        } else if ((key == 'n') || (keycode == 39)){ // display next image
            if (this.activeImage != (this.imageArray.length - 1)){
                this.disableKeyboardNav();
                this.changeImage(this.activeImage + 1);
            }
        }
    },

    //
    //  preloadNeighborImages()
    //  Preload previous and next images.
    //
    preloadNeighborImages: function(){
        var preloadNextImage, preloadPrevImage;
        if (this.imageArray.length > this.activeImage + 1){
            preloadNextImage = new Image();
            preloadNextImage.src = this.imageArray[this.activeImage + 1][0];
        }
        if (this.activeImage > 0){
            preloadPrevImage = new Image();
            preloadPrevImage.src = this.imageArray[this.activeImage - 1][0];
        }
    
    },

    //
    //  end()
    //
    end: function() {
        this.disableKeyboardNav();
        this.lightbox.hide();
        new Effect.Fade(this.overlay, { duration: this.overlayDuration });
        $$('select', 'object', 'embed').each(function(node){ node.style.visibility = 'visible' });
    },

    //
    //  getPageSize()
    //
    getPageSize: function() {
	        
	     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){ // 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
			if(document.documentElement.clientWidth){
				windowWidth = document.documentElement.clientWidth; 
			} else {
				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 = xScroll;		
		} else {
			pageWidth = windowWidth;
		}

		return [pageWidth,pageHeight];
	}
}


document.observe('dom:loaded', function () { new Lightbox(); });