/*
Script adattato da vanix al Plugin JPG GallerY per il CMS GuppY  - versione 1.8
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 closeButton = '';
// Core code from - quirksmode.org
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;
}
// 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){
xScroll = document.body.scrollWidth;
yScroll = document.body.scrollHeight;
} else {
xScroll = document.body.offsetWidth;
yScroll = document.body.offsetHeight;
}
var windowWidth, windowHeight;
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;
}
// Code from http://www.faqts.com/knowledge_base/view.phtml/aid/1602
function pause(numberMillis) {
var now = new Date();
var exitTime = now.getTime() + numberMillis;
while (true) {
now = new Date();
if (now.getTime() > exitTime)
return;
}
}
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 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;

imwid = imgPreload.width;
imhei = imgPreload.height;
objImage.style.width = imgPreload.width;
objImage.style.height = imgPreload.height;

if(imgPreload.width>(arrayPageSize[2] - 74)) {
imwid = (arrayPageSize[2] - 74);
objImage.style.width = (arrayPageSize[2] - 74);
imhei = (arrayPageSize[2] - 74)*(imgPreload.height/imgPreload.width);
objImage.style.height = (arrayPageSize[2] - 74)*(imgPreload.height/imgPreload.width);}

if(imgPreload.height>(arrayPageSize[3]-58)) {
imhei = (arrayPageSize[3]-58)
objImage.style.height = (arrayPageSize[3]-58);
imgPreload.style.height = (arrayPageSize[3]-58);
imwid = (arrayPageSize[3]-58)*(imgPreload.width/imgPreload.height);
objImage.style.width = (arrayPageSize[3]-58)*(imgPreload.width/imgPreload.height);}

var lightboxTop = (arrayPageScroll[1] + (arrayPageSize[3]- 24 - imhei)/2);
var lightboxLeft = ((arrayPageSize[0] - pwid - imwid) / 2);

objLightbox.style.top = (lightboxTop < 0) ? "0px" : lightboxTop + "px";
objLightbox.style.left = (lightboxLeft < 0) ? "0px" : lightboxLeft + "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);}
objLoadingImage.style.display = 'none';
objLightbox.style.display = 'block';
arrayPageSize = getPageSize();
objOverlay.style.height = (arrayPageSize[1] + 'px');
return false;
}
imgPreload.src = objLink.href;
hideSelectBoxes();
hideIframe();
}
function hideSelectBoxes(){
selects = document.getElementsByTagName("select");
for (i = 0; i != selects.length; i++) {
selects[i].style.visibility = "hidden";
}
}
function RiattivaSelectBoxes(){
selects = document.getElementsByTagName("select");
for (i = 0; i != selects.length; i++) {
selects[i].style.visibility = "visible";
}
}
function hideIframe(){
selects = document.getElementsByTagName("iframe");
for (i = 0; i != selects.length; i++) {
selects[i].style.visibility = "hidden";
}
}
function RiattivaIframe(){
selects = document.getElementsByTagName("iframe");
for (i = 0; i != selects.length; i++) {
selects[i].style.visibility = "visible";
}
}
function hideLightbox() {
objOverlay = document.getElementById('overlay');
objLightbox = document.getElementById('lightbox');
objOverlay.style.display = 'none';
objLightbox.style.display = 'none';
RiattivaSelectBoxes();
RiattivaIframe();
}
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.style.position = 'relative';
objLink.style.top = '0px';
objLink.style.left = '0px';
objLink.onmouseover = function () { ddrivetip(clwin); return false;}
objLink.onmouseout= function () { hideddrivetip() }
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';
objCloseButton.style.top = '5px';
objCloseButton.style.right = '5px';
objLink.appendChild(objCloseButton);
return false;
}
imgPreloadCloseButton.src = closeButton;
var objImage = document.createElement("img");
objImage.setAttribute('id','lightboxImage');
objLink.appendChild(objImage);
var objCaption = document.createElement("div");
objCaption.setAttribute('id','lightboxCaption');
objCaption.style.display = 'none';
objLightbox.appendChild(objCaption);
if(ibn<1) { document.getElementById('linkrel').style.display = 'block'; }
if(ibn==2) {
for (var i=imdon1; i<imdon2; i++){
document.getElementById('linkrel_'+i).style.display = 'block';
}
}
ibn=ibn+1;
}
// Function found at Simon Willison's weblog - http://simon.incutio.com/
function addLoadEvent(func){
var oldonload = window.onload;
if (typeof window.onload != 'function'){
window.onload = func;
} else {
window.onload = function(){
oldonload();
func();
}
}
}