/*
	Lightbox JS: Fullsize Image Overlays
	by Lokesh Dhakar - http:
	For more information on this script, visit:
	http:
	Licensed under the Creative Commons Attribution 2.5 License - http:
	(basically, do anything you want, just leave my name and link)
	Table of Contents
	-----------------
	Configuration
	Functions
	- getPageScroll()
	- getPageSize()
	- pause()
	- getKey()
	- listenKey()
	- showLightbox()
	- hideLightbox()
	- initLightbox()
	- addLoadEvent()
	Function Calls
	- addLoadEvent(initLightbox)
*/
var loadingImage = 'images/loading.gif';
var closeButton = 'images/close.gif';
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;
	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;
}
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.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','klikni pre zatvorenie');
	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 = 'zatvor kliknutím na <a href="#" class="akbd" onclick="hideLightbox(); return false;"><kbd>x</kbd></a>';
	objLightboxDetails.appendChild(objKeyboardMsg);
}
function addLoadEvent(func)
{
	var oldonload = window.onload;
	if (typeof window.onload != 'function'){
    window.onload = func;
	} else {
 window.onload = function(){
 oldonload();
 func();
 }
	}
}