var curDetailLayer = null;
var curThumbsPackage = 0;

function openWindow()
{
  x = screen.availWidth/2 - 400;
  y = screen.availHeight/2 - 323;
  win = window.open('content.php','hafen','width=800,height=470,left='+x+',top='+y+',scrollbars=no,locationbar=no'); 
}

function show(layer) 
{
  var element = document.getElementById(layer);
  element.style.visibility = "visible";
}

function hide(layer) 
{
  var element = document.getElementById(layer);
  element.style.visibility = "hidden";
}

function setCurrentDetail(layer)
{
  curDetailLayer = layer;
}

function showCurrentDetail()
{
  show(curDetailLayer);
}

function hideCurrentDetail()
{
  hide(curDetailLayer);
}

function toggle(layer)
{
  if (isVisible(layer))
    hide(layer);
  else
    show(layer);
}

function isVisible(layer)
{
  var element = document.getElementById(layer);
  return (element.style.visibility == "visible");
}

function showFilm(moviename)
{
  document.location.href = "index.php?section=archiv&moviename=" + moviename;
}

function hideFilm()
{
	hide("film");
}

function showThumbs(dir, numPackages)
{
	nextPackage = curThumbsPackage + dir;
	if (nextPackage < 0)
		nextPackage = numPackages-1;
	if (nextPackage >= numPackages)
		nextPackage = 0;

	if (curThumbsPackage != null)
		hide('thumbs' + curThumbsPackage);
	show('thumbs' + nextPackage);
	curThumbsPackage = nextPackage;
}

function showImage(section, imagename, currentPackage)
{
  document.location.href = "index.php?section=" + section + "&imagename=" + imagename + "&currentPackage=" + currentPackage;
}

function subscribe()
{
  if (document.forms[0].username.value == '' || document.forms[0].useremail.value == '')
    alert('Bitte geben Sie Namen und E-Mail Adresse ein.');
  else
    document.forms[0].submit();
}