function openAnfrage(id)
{
  window.open("anfrage.php?id="+id,"Anfrage","width=340,height=500,location=no,menubar=no,resizable=no,scrollbars=no,status=no,toolbar=no");
}

function openBildgalerie(id)
{
  window.open("bildgalerie_detail.php?id="+id,"Bildgallerie","width=530,height=480,location=no,menubar=no,resizable=no,scrollbars=no,status=no,toolbar=no");
}

function openPage(titel_page, content_page, nav_page) 
{
  parent.navigation.location.href = nav_page;
  parent.titel.location.href      = titel_page;
  parent.content.location.href    = content_page;
}