function zobraz(id)
{
  if(document.getElementById(id))
	document.getElementById(id).style.display="block";
}
function zobraz_in(id)
{
  if(document.getElementById(id))
	 document.getElementById(id).style.display="inline";
}
function odzobraz(id)
{
  if(document.getElementById(id))
	document.getElementById(id).style.display="none";
}
function zobraz_nebo_odzobraz(id) {
  if(document.getElementById(id).style.display == "block")
    document.getElementById(id).style.display="none";
  else
    document.getElementById(id).style.display="block";
}
function zobraz_nebo_odzobraz_in(id) {
  if(document.getElementById(id).style.display == "inline")
    document.getElementById(id).style.display="none";
  else
    document.getElementById(id).style.display="inline";
}
function check_or_uncheck(id) {
  if(document.getElementById(id).checked == true)
    document.getElementById(id).checked = false;
  else
    document.getElementById(id).checked = 'checked';
}
function podbarvi(id,barva)
{
  if(document.getElementById(id))
	 document.getElementById(id).style.background=barva;
}
function odbarvi(id,barva)
{
  if(document.getElementById(id))
	document.getElementById(id).style.background=barva;
}

function vyber_panel(id,no,pocet) {
  for(i=1;i<=pocet;i++) {
    if(document.getElementById(id + i)){
      if(i != no)
        document.getElementById(id + i).style.display="none";
      else
        document.getElementById(id + i).style.display="block";
    }
  }
}

function zaktivni(id,no,pocet) {
  for(i=1;i<=pocet;i++) {
    if(document.getElementById(id + i)){
      if(i != no)
        document.getElementById(id + i).className="normal";
      else
        document.getElementById(id + i).className="active";
    }
  }
}


function posun_pozici(x) {
  document.getElementById('mapa').style.backgroundPosition = "0px -" + (x*333) + "px";
}

function posun_zpet() {
  document.getElementById('mapa').style.backgroundPosition = "0px 0px";
}

function odesli(formular) {
	document.getElementById(formular).submit();
}