var loadingImage='/lb/loading.gif';
var closeButton='/lb/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,resa)
{
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;
if (resa>0&&imgPreload.width>resa) objImage.setAttribute('width',resa); else objImage.setAttribute('width',imgPreload.width);
var lightboxTop=arrayPageScroll[1]+((arrayPageSize[3]-35-imgPreload.height)/2);
cwd=imgPreload.width; if (resa>0&&imgPreload.width>resa) cwd=resa;
var lightboxLeft=((arrayPageSize[0]-20-cwd)/2);
objLightbox.style.top=(lightboxTop<20)?"20px":lightboxTop+"px";
objLightbox.style.left=(lightboxLeft<0)?"0px":lightboxLeft+"px";
objLightboxDetails.style.width=cwd+'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';}
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';
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,0);return false;}}
if(anchor.getAttribute("href")&&(anchor.getAttribute("rel")=="lightbox2")){anchor.onclick=function(){showLightbox(this,800);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','Klikněte a obrázek se zavře');
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='<span style="font:12px Arial"><kbd>x</kbd> - <a href="javascript:hideLightbox();" style="text-decoration:none;color:#000">zavřít</a></span>';
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);