function showCard(cardNumber) {
  file = 'showcard.php?view=f&card='+cardNumber;
  var card = window.open(file, 'cardWindow', 'width=550,height=550,top=50,left=50,status=no,location=no,menubar=no,resizable=no,scrollbars=no');
  card.focus();
}
function showArtists() {
  var artist = window.open('showartists.php', 'artistWindow', 'width=550,height=550,top=70,left=70,status=no,location=no,menubar=no,resizable=no,scrollbars=yes');
  artist.focus();
}
function showImprint() {
  var imprint = window.open('showimprint.htm', 'imprintWindow', 'width=550,height=550,top=50,left=50,status=no,location=no,menubar=no,resizable=no,scrollbars=yes');
  imprint.focus();
}
function showProject() {
  var project = window.open('showprojekt.htm', 'projektWindow', 'width=550,height=550,top=50,left=50,status=no,location=no,menubar=no,resizable=no,scrollbars=yes');
  project.focus();
}
function showKontakt() {
  var kontakt = window.open('showkontakt.htm', 'kontaktWindow', 'width=550,height=550,top=50,left=50,status=no,location=no,menubar=no,resizable=no,scrollbars=no');
  kontakt.focus();
}
function showDownload() {
  var guestbook = window.open('showdownload.htm', 'downloadWindow', 'width=570,height=550,top=50,left=50,status=no,location=no,menubar=no,resizable=no,scrollbars=yes');
  guestbook.focus();
}
function showSound() { //v2.0
 var sound = window.open('sound.htm','','width=150,height=150,top=40,left=40,status=no,location=no,menubar=no,resizable=no,scrollbars=no');
}
function showGuestbook() {
  var guestbook = window.open('guestbook/index.php', 'guestbookWindow', 'width=550,height=550,top=50,left=50,status=no,location=no,menubar=no,resizable=no,scrollbars=yes');
  guestbook.focus();
}