text: // -----------------------------------------------------------------------------------
  //
  //	Lightbox v2.04
  //	by Lokesh Dhakar - http://www.lokeshdhakar.com
  //	Last Modification: 2/9/08
  //
  //	For more information, visit:
  //	http://lokeshdhakar.com/projects/lightbox2/
  //
  //	Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
  //  	- Free for use in both personal and commercial projects
  //		- Attribution requires leaving author name, author link, and the license info intact.
  //	
  //  Thanks: Scott Upton(uptonic.com), Peter-Paul Koch(quirksmode.com), and Thomas Fuchs(mir.aculo.us) for ideas, libs, and snippets.
  //  		Artemy Tregubenko (arty.name) for cleanup and help in updating to latest ver of proto-aculous.
  //
  // -----------------------------------------------------------------------------------
  /*
  
      Table of Contents
      -----------------
      Configuration
  
      Lightbox Class Declaration
      - initialize()
      - updateImageList()
      - start()
      - changeImage()
      - resizeImageContainer()
      - showImage()
      - updateDetails()
      - updateNav()
      - enableKeyboardNav()
      - disableKeyboardNav()
      - keyboardAction()
      - preloadNeighborImages()
      - end()
      
      Function Calls
      - document.observe()
     
  */
  // -----------------------------------------------------------------------------------
  
  //
  //  Configurationl
  //
  LightboxOptions = Object.extend({
      fileLoadingImage:        '/admin_assistant/img/lightbox/loading.gif',     
      fileBottomNavCloseImage: '/admin_assistant/img/lightbox/closelabel.gif',
  
      overlayOpacity: 0.8,   // 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: 10,         //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 || {});
  
  // -----------------------------------------------------------------------------------
  
  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('div',{id:'lightbox'}, [
              Builder.node('div',{id:'outerImageContainer'}, 
                  Builder.node('div',{id:'imageContainer'}, [
                      Builder.node('img',{id:'lightboxImage'}), 
                      Builder.node('div',{id:'hoverNav'}, [
                          Builder.node('a',{id:'prevLink', href: '#' }),
                          Builder.node('a',{id:'nextLink', href: '#' })
                      ]),
                      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:'imageDetails'}, [
                          Builder.node('span',{id:'caption'}),
                          Builder.node('span',{id:'numberDisplay'})
                      ]),
                      Builder.node('div',{id:'bottomNav'},
                          Builder.node('a',{id:'bottomNavClose', href: '#' },
                              Builder.node('img', { src: LightboxOptions.fileBottomNavCloseImage })
                          )
                      )
                  ])
              )
          ]));
  
  
  		$('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 });
  		$('prevLink').observe('click', (function(event) { event.stop(); this.changeImage(this.activeImage - 1); }).bindAsEventListener(this));
  		$('nextLink').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));
  
          var th = this;
          (function(){
              var ids = 
                  'overlay lightbox outerImageContainer imageContainer lightboxImage hoverNav prevLink nextLink loading loadingLink ' + 
                  'imageDataContainer imageData imageDetails caption numberDisplay bottomNav 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' });
  
          new Effect.Appear(this.overlay, { duration: this.overlayDuration, from: 0.0, to: LightboxOptions.overlayOpacity });
  
          this.imageArray = [];
          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++; }
          }
  
          // 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: lightboxTop + 'px', left: lightboxLeft + 'px' }).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.loading.show();
          this.lightboxImage.hide();
          this.hoverNav.hide();
          this.prevLink.hide();
          this.nextLink.hide();
  		// HACK: Opera9 does not currently support scriptaculous opacity and appear fx
          this.imageDataContainer.setStyle({opacity: .0001});
          this.numberDisplay.hide();      
          
          var imgPreloader = new Image();
          
          // 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);
  
          // 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.prevLink.setStyle({ height: imgHeight + 'px' });
              this.nextLink.setStyle({ height: imgHeight + 'px' });
              this.imageDataContainer.setStyle({ width: widthNew + '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: this.resizeDuration, 
              queue: 'end', 
              afterFinish: (function(){ this.updateDetails(); }).bind(this) 
          });
          this.preloadNeighborImages();
      },
  
      //
      //  updateDetails()
      //  Display caption, image number, and bottom nav.
      //
      updateDetails: function() {
      
          // if caption is not null
          if (this.imageArray[this.activeImage][1] != ""){
              this.caption.update(this.imageArray[this.activeImage][1]).show();
          }
          
          // if image is part of set display 'Image x of x' 
          if (this.imageArray.length > 1){
              this.numberDisplay.update( LightboxOptions.labelImage + ' ' + (this.activeImage + 1) + ' ' + LightboxOptions.labelOf + '  ' + this.imageArray.length).show();
          }
  
          new Effect.Parallel(
              [ 
                  new Effect.SlideDown(this.imageDataContainer, { sync: true, duration: this.resizeDuration, from: 0.0, to: 1.0 }), 
                  new Effect.Appear(this.imageDataContainer, { sync: true, duration: this.resizeDuration }) 
              ], 
              { 
                  duration: this.resizeDuration, 
                  afterFinish: (function() {
  	                // update overlay size and update nav
  	                var arrayPageSize = this.getPageSize();
  	                this.overlay.setStyle({ height: arrayPageSize[1] + 'px' });
  	                this.updateNav();
                  }).bind(this)
              } 
          );
      },
  
      //
      //  updateNav()
      //  Display appropriate previous and next hover navigation.
      //
      updateNav: function() {
  
          this.hoverNav.show();               
  
          // if not first image in set, display prev image button
          if (this.activeImage > 0) this.prevLink.show();
  
          // if not last image in set, display next image button
          if (this.activeImage < (this.imageArray.length - 1)) this.nextLink.show();
          
          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(); });