function schovaniElementu() {
  document.getElementById('detailGalerie').style.visibility = 'hidden';
  document.getElementById('detailGalerie_popis').style.visibility = 'hidden';
  document.getElementById('detailGalerie_tlacitkaPosunu').style.visibility = 'hidden';
  document.getElementById('detailGalerie_tlacitkoZavrit').style.visibility = 'hidden';
  for(var i = 0; i < document.getElementsByTagName('p').length; i++) {
    if (document.getElementsByTagName('p')[i].className == 'keywords')
      document.getElementsByTagName('p')[i].style.visibility = 'hidden';
  }
  for(var i = 0; i < document.getElementsByTagName('div').length; i++) {
    if (document.getElementsByTagName('div')[i].className == 'infoObal')
      document.getElementsByTagName('div')[i].style.visibility = 'hidden';
  }
}