var loadingImage='../_lb_resources/loading.gif';
var closeButton='../_lb_resources/closelabel.gif';
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;}
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;}
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) { // ie
keycode=event.keyCode;
} else { // mozilla
keycode=e.which;}
key=String.fromCharCode(keycode).toLowerCase();

if(key == 'x'){ hideLightbox(); }}
function listenKey () {document.onkeypress=getKey; }

function showLightbox(objLink)
{
// prep objects
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.width = (arrayPageSize[0] + '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';}
// A small pause between the image loading and displaying is required with IE,
// this prevents the previous image displaying for a short burst causing flicker.
if (navigator.appVersion.indexOf("MSIE")!=-1){
pause(250);
} 
if (objLoadingImage) {objLoadingImage.style.display='none'; }
objLightbox.style.display='block';
arrayPageSize=getPageSize();
objOverlay.style.height=(arrayPageSize[1] + 'px');
listenKey();
return false;}
imgPreload.src=objLink.href;}
function hideLightbox()
{
// get objects
objOverlay=document.getElementById('overlay');
objLightbox=document.getElementById('lightbox');
objOverlay.style.display='none';
objLightbox.style.display='none';
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='290';
objOverlay.style.width='200%';
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='350';
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='300';
objBody.insertBefore(objLightbox, objOverlay.nextSibling);
var objLink=document.createElement("a");
objLink.setAttribute('href','#');
objLink.setAttribute('title','Click to close');
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='400';
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 <kbd>x</kbd> to close';}
function addLoadEvent(func)
{
var oldonload=window.onload;
if (typeof window.onload != 'function'){
    window.onload=func;
} else {
window.onload=function(){
oldonload();
func();}
}}
addLoadEvent(initLightbox);// run initLightbox onLoad