function getNext(){
currentIndex++;
if(currentIndex == (opener.imgArray.length-1))document.getElementById('nextLink').style.display = 'none';
else document.getElementById('nextLink').style.display = '';
document.getElementById('prevLink').style.display = '';
document.getElementById('mainImage').src = 'http://' + opener.location.host + '/' + opener.imgArray[currentIndex];
}
function getPrevious(){
if(currentIndex>0)currentIndex--;
if(currentIndex==0)document.getElementById('prevLink').style.display = 'none';
else document.getElementById('prevLink').style.display = '';
document.getElementById('nextLink').style.display = '';
document.getElementById('mainImage').src = 'http://' + opener.location.host + '/' + opener.imgArray[currentIndex];
}
var f;
function galleryPopup(index,imgSrc){
if(!f || f.closed){
f = window.open('','',"width=650,height=650,left=150,top=150");
f.document.open();
}
f.focus();
if(index==0)prevDisplay = 'display:none';
else prevDisplay = '';
if(index==(imgArray.length - 1))nextDisplay = 'display:none';
else nextDisplay = '';
f.document.write('Einzelbild-Ansicht');
f.document.close();
}