function Zalozka(Id) {
  if (document.getElementById('zalozka' + Id).style.display == "block") {
  	document.getElementById('zalozka' + Id).style.display = "none";
  	document.getElementById('zalozka' + Id + 'a').style.display = "block";
  	document.getElementById('data' + Id).style.display = "none";
  	document.getElementById('data' + Id + 'a').style.display = "block";
  } else {
  	document.getElementById('zalozka' + Id).style.display = "block";
    document.getElementById('zalozka' + Id + 'a').style.display = "none";
    document.getElementById('data' + Id).style.display = "block";
    document.getElementById('data' + Id + 'a').style.display = "none";
  }
}