// -----------------------------------------------------------------------------------
//
//	Lightbox v2.03.2
//	by Lokesh Dhakar - http://www.huddletogether.com
//	4/30/06
//
//	For more information on this script, visit:
//	http://huddletogether.com/projects/lightbox2/
//
//	Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
//
//	Credit also due to those who have helped, inspired, and made their code available to the public.
//	Including: Scott Upton(uptonic.com), Peter-Paul Koch(quirksmode.org), Thomas Fuchs(mir.aculo.us), and others.
//
//
// -----------------------------------------------------------------------------------
/*

  Table of Contents
  -----------------
  Configuration
  Global Variables

  Extending Built-in Objects
  - Object.extend(Element)
  - Array.prototype.removeDuplicates()
  - Array.prototype.empty()

  Lightbox Class Declaration
  - initialize()
  - start()
  - changeImage()
  - resizeImageContainer()
  - showImage()
  - updateDetails()
  - updateNav()
  - enableKeyboardNav()
  - disableKeyboardNav()
  - keyboardAction()
  - preloadNeighborImages()
  - end()

  Miscellaneous Functions
  - getPageScroll()
  - getPageSize()
  - getKey()
  - listenKey()
  - showSelectBoxes()
  - hideSelectBoxes()
  - showFlash()
  - hideFlash()
  - pause()
  - initLightbox()

  Function Calls
  - addLoadEvent(initLightbox)

*/
// -----------------------------------------------------------------------------------

//
//	Configuration
//
var fileLoadingImage = "/images/lightbox/loading.gif";
var fileBottomNavCloseImage = "/images/lightbox/closelabel.gif";

var overlayOpacity = 0.8;	// controls transparency of shadow overlay

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

var borderSize = 5;		//if you adjust the padding in the CSS, you will need to update this variable

// -----------------------------------------------------------------------------------

//
//	Global Variables
//
var imageArray = new Array;
var activeImage;

if(animate == true){
  overlayDuration = 0.2;	// shadow fade in/out duration
  if(resizeSpeed > 10){ resizeSpeed = 10;}
  if(resizeSpeed < 1){ resizeSpeed = 1;}
  resizeDuration = (11 - resizeSpeed) * 0.15;
} else {
  overlayDuration = 0;
  resizeDuration = 0;
}

// -----------------------------------------------------------------------------------

//
//	Additional methods for Element added by SU, Couloir
//	- further additions by Lokesh Dhakar (huddletogether.com)
//
Object.extend(Element, {
  getWidth: function(element) {
       element = $(element);
       return element.offsetWidth;
  },
  setWidth: function(element,w) {
       element = $(element);
      element.style.width = w +"px";
  },
  setHeight: function(element,h) {
       element = $(element);
      element.style.height = h +"px";
  },
  setTop: function(element,t) {
       element = $(element);
      element.style.top = t +"px";
  },
  setSrc: function(element,src) {
      element = $(element);
      element.src = src;
  },
  setHref: function(element,href) {
      element = $(element);
      element.href = href;
  },
  setInnerHTML: function(element,content) {
    element = $(element);
    element.innerHTML = content;
  }
});

// -----------------------------------------------------------------------------------

//
//	Extending built-in Array object
//	- array.removeDuplicates()
//	- array.empty()
//
Array.prototype.removeDuplicates = function () {
    for(i = 0; i < this.length; i++){
        for(j = this.length-1; j>i; j--){
            if(this[i][0] == this[j][0]){
                this.splice(j,1);
            }
        }
    }
}

// -----------------------------------------------------------------------------------

Array.prototype.empty = function () {
  for(i = 0; i <= this.length; i++){
    this.shift();
  }
}

// -----------------------------------------------------------------------------------

//
//	Lightbox Class Declaration
//	- initialize()
//	- start()
//	- changeImage()
//	- resizeImageContainer()
//	- showImage()
//	- updateDetails()
//	- updateNav()
//	- enableKeyboardNav()
//	- disableKeyboardNav()
//	- keyboardNavAction()
//	- preloadNeighborImages()
//	- end()
//
//	Structuring of code inspired by Scott Upton (http://www.uptonic.com/)
//
var Lightbox = Class.create();

Lightbox.prototype = {

  // initialize()
  // Constructor runs on completion of the DOM loading. Loops through anchor tags looking for
  // 'lightbox' references and applies onclick events to appropriate links. The 2nd section of
  // the function inserts html at the bottom of the page which is used to display the shadow
  // overlay and the image container.
  //
  initialize: function() {
    if (!document.getElementsByTagName){ return; }
    var anchors = document.getElementsByTagName('a');
    var areas = document.getElementsByTagName('area');

    // loop through all anchor tags
    for (var i=0; i<anchors.length; i++){
      var anchor = anchors[i];

      var relAttribute = String(anchor.getAttribute('rel'));

      // use the string.match() method to catch 'lightbox' references in the rel attribute
      if (anchor.getAttribute('href') && (relAttribute.toLowerCase().match('lightbox'))){
        anchor.onclick = function () {myLightbox.start(this); return false;}
      }
    }

    // loop through all area tags
    // todo: combine anchor & area tag loops
    for (var i=0; i< areas.length; i++){
      var area = areas[i];

      var relAttribute = String(area.getAttribute('rel'));

      // use the string.match() method to catch 'lightbox' references in the rel attribute
      if (area.getAttribute('href') && (relAttribute.toLowerCase().match('lightbox'))){
        area.onclick = function () {myLightbox.start(this); return false;}
      }
    }

    // The rest of this 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/lightbox/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/lightbox/close.gif">
    //					</a>
    //				</div>
    //			</div>
    //		</div>
    //	</div>

    var objBody = document.getElementsByTagName("body").item(0);

    var objOverlay = document.createElement("div");
    objOverlay.setAttribute('id','overlay');
    objOverlay.style.display = 'none';
    objOverlay.onclick = function() { myLightbox.end(); }
    objBody.appendChild(objOverlay);

    var objLightbox = document.createElement("div");
    objLightbox.setAttribute('id','lightbox');
    objLightbox.style.display = 'none';
    objLightbox.onclick = function(e) {	// close Lightbox is user clicks shadow overlay
      if (!e) var e = window.event;
      var clickObj = Event.element(e).id;
      if ( clickObj == 'lightbox') {
        myLightbox.end();
      }
    };
    objBody.appendChild(objLightbox);

    var objOuterImageContainer = document.createElement("div");
    objOuterImageContainer.setAttribute('id','outerImageContainer');
    objLightbox.appendChild(objOuterImageContainer);

    // 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.
    if(animate){
      Element.setWidth('outerImageContainer', 250);
      Element.setHeight('outerImageContainer', 250);
    } else {
      Element.setWidth('outerImageContainer', 1);
      Element.setHeight('outerImageContainer', 1);
    }

    var objImageContainer = document.createElement("div");
    objImageContainer.setAttribute('id','imageContainer');
    objOuterImageContainer.appendChild(objImageContainer);

    var objLightboxImage = document.createElement("img");
    objLightboxImage.setAttribute('id','lightboxImage');
    objImageContainer.appendChild(objLightboxImage);

    var objHoverNav = document.createElement("div");
    objHoverNav.setAttribute('id','hoverNav');
    objImageContainer.appendChild(objHoverNav);

    var objPrevLink = document.createElement("a");
    objPrevLink.setAttribute('id','prevLink');
    objPrevLink.setAttribute('href','#');
    objHoverNav.appendChild(objPrevLink);

    var objNextLink = document.createElement("a");
    objNextLink.setAttribute('id','nextLink');
    objNextLink.setAttribute('href','#');
    objHoverNav.appendChild(objNextLink);

    var objLoading = document.createElement("div");
    objLoading.setAttribute('id','loading');
    objImageContainer.appendChild(objLoading);

    var objLoadingLink = document.createElement("a");
    objLoadingLink.setAttribute('id','loadingLink');
    objLoadingLink.setAttribute('href','#');
    objLoadingLink.onclick = function() { myLightbox.end(); return false; }
    objLoading.appendChild(objLoadingLink);

    var objLoadingImage = document.createElement("img");
    objLoadingImage.setAttribute('src', fileLoadingImage);
    objLoadingLink.appendChild(objLoadingImage);

    var objImageDataContainer = document.createElement("div");
    objImageDataContainer.setAttribute('id','imageDataContainer');
    objLightbox.appendChild(objImageDataContainer);

    var objImageData = document.createElement("div");
    objImageData.setAttribute('id','imageData');
    objImageDataContainer.appendChild(objImageData);

    var objImageDetails = document.createElement("div");
    objImageDetails.setAttribute('id','imageDetails');
    objImageData.appendChild(objImageDetails);

    var objCaption = document.createElement("span");
    objCaption.setAttribute('id','caption');
    objImageDetails.appendChild(objCaption);

    var objNumberDisplay = document.createElement("span");
    objNumberDisplay.setAttribute('id','numberDisplay');
    objImageDetails.appendChild(objNumberDisplay);

    var objBottomNav = document.createElement("div");
    objBottomNav.setAttribute('id','bottomNav');
    objImageData.appendChild(objBottomNav);

    var objBottomNavCloseLink = document.createElement("a");
    objBottomNavCloseLink.setAttribute('id','bottomNavClose');
    objBottomNavCloseLink.setAttribute('href','#');
    objBottomNavCloseLink.onclick = function() { myLightbox.end(); return false; }
    objBottomNav.appendChild(objBottomNavCloseLink);

    var objBottomNavCloseImage = document.createElement("img");
    objBottomNavCloseImage.setAttribute('src', fileBottomNavCloseImage);
    objBottomNavCloseLink.appendChild(objBottomNavCloseImage);
  },

  //
  //	start()
  //	Display overlay and lightbox. If image is part of a set, add siblings to imageArray.
  //
  start: function(imageLink) {

    tXHMCount = false;
    hideSelectBoxes();
    hideFlash();

    // stretch overlay to fill page and fade in
    var arrayPageSize = getPageSize();
    Element.setHeight('overlay', arrayPageSize[1]);

    new Effect.Appear('overlay', { duration: overlayDuration, from: 0.0, to: overlayOpacity });

    imageArray = [];
    imageNum = 0;

    if (!document.getElementsByTagName){ return; }
    var anchors = document.getElementsByTagName( imageLink.tagName);

    // if image is NOT part of a set..
    if((imageLink.getAttribute('rel') == 'lightbox')){
      // add single image to imageArray
      imageArray.push(new Array(imageLink.getAttribute('href'), imageLink.getAttribute('title')));
    } else {
    // if image is part of a set..

      // loop through anchors, find other images in set, and add them to imageArray
      for (var i=0; i<anchors.length; i++){
        var anchor = anchors[i];
        if (anchor.getAttribute('href') && (anchor.getAttribute('rel') == imageLink.getAttribute('rel'))){
          imageArray.push(new Array(anchor.getAttribute('href'), anchor.getAttribute('title')));
        }
      }
      imageArray.removeDuplicates();
      while(imageArray[imageNum][0] != imageLink.getAttribute('href')) { imageNum++;}
    }

    // calculate top offset for the lightbox and display
    var arrayPageScroll = getPageScroll();
    var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 10);

    Element.setTop('lightbox', lightboxTop);
    Element.show('lightbox');

    this.changeImage(imageNum);
  },

  //
  //	changeImage()
  //	Hide most elements and preload image in preparation for resizing image container.
  //
  changeImage: function(imageNum) {

    activeImage = imageNum;	// update global var

    // hide elements during transition
    if(animate){ Element.show('loading');}
    Element.hide('lightboxImage');
    Element.hide('hoverNav');
    Element.hide('prevLink');
    Element.hide('nextLink');
    Element.hide('imageDataContainer');
    Element.hide('numberDisplay');

    imgPreloader = new Image();

    // once image is preloaded, resize image container
    imgPreloader.onload=function(){
      Element.setSrc('lightboxImage', imageArray[activeImage][0]);
      myLightbox.resizeImageContainer(imgPreloader.width, imgPreloader.height);

      imgPreloader.onload=function(){};	//	clear onLoad, IE behaves irratically with animated gifs otherwise
    }
    imgPreloader.src = imageArray[activeImage][0];
  },

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

    // get curren width and height
    this.widthCurrent = Element.getWidth('outerImageContainer');
    this.heightCurrent = Element.getHeight('outerImageContainer');

    // get new width and height
    var widthNew = (imgWidth  + (borderSize * 2));
    var heightNew = (imgHeight  + (borderSize * 2));

    // scalars based on change from old to new
    this.xScale = ( widthNew / this.widthCurrent) * 100;
    this.yScale = ( heightNew / this.heightCurrent) * 100;

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

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

    // if new and old image are same size and no scaling transition is necessary,
    // do a quick pause to prevent image flicker.
    if((hDiff == 0) && (wDiff == 0)){
      if (navigator.appVersion.indexOf("MSIE")!=-1){ pause(250); } else { pause(100);}
    }

    Element.setHeight('prevLink', imgHeight);
    Element.setHeight('nextLink', imgHeight);
    Element.setWidth( 'imageDataContainer', widthNew);

    this.showImage();
  },

  //
  //	showImage()
  //	Display image and begin preloading neighbors.
  //
  showImage: function(){
    Element.hide('loading');
    new Effect.Appear('lightboxImage', { duration: resizeDuration, queue: 'end', afterFinish: function(){	myLightbox.updateDetails(); } });
    this.preloadNeighborImages();
  },

  //
  //	updateDetails()
  //	Display caption, image number, and bottom nav.
  //
  updateDetails: function() {

    Element.show('caption');
    Element.setInnerHTML( 'caption', imageArray[activeImage][1]);
    var signupvar  = '';
    try {
      var signupLNK = document.getElementById('signupLNK');
      var signupTXT = document.getElementById('nav_signup').innerHTML.toUpperCase();
      signupLNK     = document.getElementById('signupLNK').href;
      if(signupLNK != undefined) {
        signupvar      = '<br /><a href="'+signupLNK+'" target="_parent" class="link_black_box"><img src="/images/arrow-down-red-small.png" title="'+signupTXT+'" alt="'+signupTXT+'" border="0" align="absmiddle"> '+signupTXT+'...</a>';
      }
    } catch (e) {}
    // if image is part of set display 'Image x of x'
    if(imageArray.length > 1){
      Element.show('numberDisplay');
      Element.setInnerHTML( 'numberDisplay', "Image " + eval(activeImage + 1) + " of " + imageArray.length + signupvar);
    }

    new Effect.Parallel(
      [ new Effect.SlideDown( 'imageDataContainer', { sync: true, duration: resizeDuration, from: 0.0, to: 1.0 }),
        new Effect.Appear('imageDataContainer', { sync: true, duration: resizeDuration }) ],
      { duration: resizeDuration, afterFinish: function() {
        // update overlay size and update nav
        var arrayPageSize = getPageSize();
        Element.setHeight('overlay', arrayPageSize[1]);
        myLightbox.updateNav();
        }
      }
    );
  },

  //
  //	updateNav()
  //	Display appropriate previous and next hover navigation.
  //
  updateNav: function() {

    Element.show('hoverNav');

    // if not first image in set, display prev image button
    if(activeImage != 0){
      Element.show('prevLink');
      document.getElementById('prevLink').onclick = function() {
        myLightbox.changeImage(activeImage - 1); return false;
      }
    }

    // if not last image in set, display next image button
    if(activeImage != (imageArray.length - 1)){
      Element.show('nextLink');
      document.getElementById('nextLink').onclick = function() {
        myLightbox.changeImage(activeImage + 1); return false;
      }
    }

    this.enableKeyboardNav();
  },

  //
  //	enableKeyboardNav()
  //
  enableKeyboardNav: function() {
    document.onkeydown = this.keyboardAction;
  },

  //
  //	disableKeyboardNav()
  //
  disableKeyboardNav: function() {
    document.onkeydown = '';
  },

  //
  //	keyboardAction()
  //
  keyboardAction: function(e) {
    if (e == null) { // ie
      keycode = event.keyCode;
      escapeKey = 27;
    } else { // mozilla
      keycode = e.keyCode;
      escapeKey = e.DOM_VK_ESCAPE;
    }

    key = String.fromCharCode(keycode).toLowerCase();

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

  },

  //
  //	preloadNeighborImages()
  //	Preload previous and next images.
  //
  preloadNeighborImages: function(){

    if((imageArray.length - 1) > activeImage){
      preloadNextImage = new Image();
      preloadNextImage.src = imageArray[activeImage + 1][0];
    }
    if(activeImage > 0){
      preloadPrevImage = new Image();
      preloadPrevImage.src = imageArray[activeImage - 1][0];
    }

  },

  //
  //	end()
  //
  end: function() {
    this.disableKeyboardNav();
    Element.hide('lightbox');
    new Effect.Fade('overlay', { duration: overlayDuration});
    showSelectBoxes();
    tXHMCount = true;
    showFlash();
  }
}

// -----------------------------------------------------------------------------------

//
// getPageScroll()
// Returns array with x,y page scroll values.
// Core code from - quirksmode.org
//
function getPageScroll(){

  var yScroll;

  if (self.pageYOffset) {
    yScroll = self.pageYOffset;
  } else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
    yScroll = document.documentElement.scrollTop;
  } else if (document.body) {// all other Explorers
    yScroll = document.body.scrollTop;
  }

  arrayPageScroll = new Array('',yScroll)
  return arrayPageScroll;
}

// -----------------------------------------------------------------------------------

//
// getPageSize()
// Returns array with page width, height and window width, height
// Core code from - quirksmode.org
// Edit for Firefox by pHaez
//
function getPageSize(){

  var xScroll, yScroll;

  if (window.innerHeight && window.scrollMaxY) {
    xScroll = document.body.scrollWidth;
    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
    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 = windowWidth;
  } else {
    pageWidth = xScroll;
  }

  arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight)
  return arrayPageSize;
}

// -----------------------------------------------------------------------------------

//
// getKey(key)
// Gets keycode. If 'x' is pressed then it hides the lightbox.
//
function getKey(e){
  if (e == null) { // ie
    keycode = event.keyCode;
  } else { // mozilla
    keycode = e.which;
  }
  key = String.fromCharCode(keycode).toLowerCase();

  if(key == 'x'){
  }
}

// -----------------------------------------------------------------------------------

//
// listenKey()
//
function listenKey () {	document.onkeypress = getKey; }

// ---------------------------------------------------

function showSelectBoxes(){
  var selects = document.getElementsByTagName("select");
  for (i = 0; i != selects.length; i++) {
    selects[i].style.visibility = "visible";
  }
}

// ---------------------------------------------------

function hideSelectBoxes(){
  var selects = document.getElementsByTagName("select");
  for (i = 0; i != selects.length; i++) {
    selects[i].style.visibility = "hidden";
  }
}

// ---------------------------------------------------

function showFlash(){
  var flashObjects = document.getElementsByTagName("object");
  for (i = 0; i < flashObjects.length; i++) {
    flashObjects[i].style.visibility = "visible";
  }

  var flashEmbeds = document.getElementsByTagName("embed");
  for (i = 0; i < flashEmbeds.length; i++) {
    flashEmbeds[i].style.visibility = "visible";
  }
}

// ---------------------------------------------------

function hideFlash(){
  var flashObjects = document.getElementsByTagName("object");
  for (i = 0; i < flashObjects.length; i++) {
    flashObjects[i].style.visibility = "hidden";
  }

  var flashEmbeds = document.getElementsByTagName("embed");
  for (i = 0; i < flashEmbeds.length; i++) {
    flashEmbeds[i].style.visibility = "hidden";
  }

}


// ---------------------------------------------------

//
// pause(numberMillis)
// Pauses code execution for specified time. Uses busy code, not good.
// Help from Ran Bar-On [ran2103@gmail.com]
//

function pause(ms){
  var date = new Date();
  curDate = null;
  do{var curDate = new Date();}
  while( curDate - date < ms);
}
/*
function pause(numberMillis) {
  var curently = new Date().getTime() + sender;
  while (new Date().getTime();
}
*/
// ---------------------------------------------------



function initLightbox() { myLightbox = new Lightbox(); }
Event.observe(window, 'load', initLightbox, false);