/*
Lightbox JS: Fullsize Image Overlays
by Lokesh Dhakar - http://www.huddletogether.com
For more information on this script, visit:
http://huddletogether.com/projects/lightbox/

Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
(basically, do anything you want, just leave my name and link)
*/

var loadingImage = '/images/lightbox/loading.gif';
var closeButton = '/images/lightbox/close.gif';
  alert(objLink.getAttribute('title'));


function getPageScroll () {

 var yScroll;
 if (self.pageYOffset) yScroll = self.pageYOffset;
 else if (document.documentElement && document.documentElement.scrollTop) yScroll = document.documentElement.scrollTop;
 else if (document.body) yScroll = document.body.scrollTop;
 arrayPageScroll = new Array('',yScroll);
 return arrayPageScroll;

}

function getPageSize () {

 var xScroll, yScroll;
 var windowWidth, windowHeight;
 if (window.innerHeight && window.scrollMaxY) { xScroll = document.body.scrollWidth; 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; }
 if (self.innerHeight) { 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 = windowWidth; else pageWidth = xScroll;
 arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight)
 return arrayPageSize;

}

function pause ( numberMillis ) {

 var now = new Date();
 var exitTime = now.getTime() + numberMillis;
 while (true) { now = new Date(); if (now.getTime() > exitTime); return; }

}

function getKey ( e ) {

 if (e == null) keycode = event.keyCode;
 else keycode = e.which;
 key = String.fromCharCode(keycode).toLowerCase();
 if (key == 'x') hideLightbox();

}

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

function showLightbox ( objLink ) {

 var objOverlay = document.getElementById('overlay');
 var objLightbox = document.getElementById('lightbox');
 var objCaption = document.getElementById('lightboxCaption');
 var objImage = document.getElementById('lightboxImage');
 var objLoadingImage = document.getElementById('loadingImage');
 var objLightboxDetails = document.getElementById('lightboxDetails');
 var arrayPageSize = getPageSize();
 var arrayPageScroll = getPageScroll();
 if (objLoadingImage) {
  objLoadingImage.style.top = (arrayPageScroll[1] + ((arrayPageSize[3] - 35 - objLoadingImage.height) / 2) + 'px');
  objLoadingImage.style.left = (((arrayPageSize[0] - 20 - objLoadingImage.width) / 2) + 'px');
  objLoadingImage.style.display = 'block';
 }
 objOverlay.style.height = (arrayPageSize[1] + 'px');
 objOverlay.style.display = 'block';
 imgPreload = new Image();
 imgPreload.onload = function () {
  objImage.src = objLink.href;
  var lightboxTop = arrayPageScroll[1] + ((arrayPageSize[3] - 35 - imgPreload.height) / 2);
  var lightboxLeft = ((arrayPageSize[0] - 20 - imgPreload.width) / 2);
  objLightbox.style.top = (lightboxTop < 0) ? "0px" : lightboxTop + "px";
  objLightbox.style.left = (lightboxLeft < 0) ? "0px" : lightboxLeft + "px";
  objLightboxDetails.style.width = imgPreload.width + 'px';
  if (objLink.getAttribute('title')) {
   objCaption.style.display = 'block';
   //objCaption.style.width = imgPreload.width + 'px';
   objCaption.innerHTML = objLink.getAttribute('title');
  } else objCaption.style.display = 'none';
  if (navigator.appVersion.indexOf("MSIE")!=-1) pause(250);
  if (objLoadingImage) objLoadingImage.style.display = 'none';
  selects = document.getElementsByTagName("select");
  for (i = 0; i != selects.length; i++) selects[i].style.visibility = "hidden";
  objLightbox.style.display = 'block';
  arrayPageSize = getPageSize();
  objOverlay.style.height = (arrayPageSize[1] + 'px');
  listenKey();
  return false;
 }
 imgPreload.src = objLink.href;
}

function hideLightbox () {
 objOverlay = document.getElementById('overlay');
 objLightbox = document.getElementById('lightbox');
 objOverlay.style.display = 'none';
 objLightbox.style.display = 'none';
 selects = document.getElementsByTagName("select");
 for (i = 0; i != selects.length; i++) selects[i].style.visibility = "visible";
 document.onkeypress = '';
}

function initLightbox () {
 if (!document.getElementsByTagName) return;
 var anchors = document.getElementsByTagName("a");
 for (var i=0; i<anchors.length; i++) {
  var anchor = anchors[i];
  if (anchor.getAttribute("href") && (anchor.getAttribute("rel") == "lightbox")) anchor.onclick = function () { showLightbox(this); return false; }
 }
 var objBody = document.getElementsByTagName("body").item(0);
 var objOverlay = document.createElement("div");
 objOverlay.setAttribute('id','overlay');
 objOverlay.onclick = function () { hideLightbox(); return false; }
 objOverlay.style.display = 'none';
 objOverlay.style.position = 'absolute';
 objOverlay.style.top = '0';
 objOverlay.style.left = '0';
 objOverlay.style.zIndex = '90';
 objOverlay.style.width = '100%';
 objBody.insertBefore(objOverlay, objBody.firstChild);
 var arrayPageSize = getPageSize();
 var arrayPageScroll = getPageScroll();
 var imgPreloader = new Image();
 imgPreloader.onload = function () {
  var objLoadingImageLink = document.createElement("a");
  objLoadingImageLink.setAttribute('href','#');
  objLoadingImageLink.onclick = function () {hideLightbox(); return false;}
  objOverlay.appendChild(objLoadingImageLink);
  var objLoadingImage = document.createElement("img");
  objLoadingImage.src = loadingImage;
  objLoadingImage.setAttribute('id','loadingImage');
  objLoadingImage.style.position = 'absolute';
  objLoadingImage.style.zIndex = '150';
  objLoadingImageLink.appendChild(objLoadingImage);
  imgPreloader.onload = function () {};
  return false;
 }
 imgPreloader.src = loadingImage;
 var objLightbox = document.createElement("div");
 objLightbox.setAttribute('id','lightbox');
 objLightbox.style.display = 'none';
 objLightbox.style.position = 'absolute';
 objLightbox.style.zIndex = '100';
 objBody.insertBefore(objLightbox, objOverlay.nextSibling);
 var objLink = document.createElement("a");
 objLink.setAttribute('href','#');
 objLink.setAttribute('title','Clicca per chiudere!');
 objLink.onclick = function () { hideLightbox(); return false; }
 objLightbox.appendChild(objLink);
 var imgPreloadCloseButton = new Image();
 imgPreloadCloseButton.onload = function () {
  var objCloseButton = document.createElement("img");
  objCloseButton.src = closeButton;
  objCloseButton.setAttribute('id','closeButton');
  objCloseButton.style.position = 'absolute';
  objCloseButton.style.zIndex = '200';
  objLink.appendChild(objCloseButton);
  return false;
 }
 imgPreloadCloseButton.src = closeButton;
 var objImage = document.createElement("img");
 objImage.setAttribute('id','lightboxImage');
 objLink.appendChild(objImage);
 var objLightboxDetails = document.createElement("div");
 objLightboxDetails.setAttribute('id','lightboxDetails');
 objLightbox.appendChild(objLightboxDetails);
 var objCaption = document.createElement("div");
 objCaption.setAttribute('id','lightboxCaption');
 objCaption.style.display = 'none';
 objLightboxDetails.appendChild(objCaption);

/*
 var objKeyboardMsg = document.createElement("div");
 objKeyboardMsg.setAttribute('id','keyboardMsg');
 objKeyboardMsg.innerHTML = 'press <a href="#" onclick="hideLightbox(); return false;"><kbd>x</kbd></a> to close';
 objLightboxDetails.appendChild(objKeyboardMsg);
*/

}

function addLoadEvent ( func ) {

 var oldonload = window.onload;
 if (typeof window.onload != 'function') window.onload = func;
 else window.onload = function () { oldonload(); func(); }

}

addLoadEvent(initLightbox);