function switchDisplay(id) {
  //nastavSirku(id);
  window.scrollTo(0,0);
  nastavVysku(id);
  document.getElementById(id).style.display="block";
}
function nastavSirku(id){
  var sirka = window.width;
  document.getElementById(id).style.width = sirka + "px";
}
function nastavVysku(id){
  //var vyska = Window.innerHeight;
  var vyska = screen.height;
  document.getElementById(id).style.height = vyska + "px";
}