function zmena(tmp, val, val2) {
  var choosenoption = document.getElementById(tmp).options.value;
  //alert(choosenoption);
  // zpristupni 2. uroven
  //document.getElementById("select2").style.visibility = 'visible';
  document.getElementById(val).className = 'no_transparent';
  document.getElementById(val2).style.visibility = 'visible';
}

//function disableBox(value){
//    switch(value){
//        case 1:
//            document.getElementById('select2').className = 'transparent';
//            document.getElementById('sel2').style.visibility = 'none';
//        case 2:
//            document.getElementById('select3').className = 'transparent';
//            document.getElementById('sel3').style.visibility = 'none';
//    }
//    for (i = 1; i < 4; i++){
//        document.getElementById('filtr'+i).className = 'transparent';
//        document.getElementById('fil'+i).style.visibility = 'none';
//    }
//}

//function visibleFilter() {
//  for (i = 1; i < 4; i++){
//    document.getElementById('filtr'+i).className = 'no_transparent';
//    document.getElementById('fil'+i).style.visibility = 'visible';
//  }
//}

function showNeon( tmp ) {
  document.getElementById('neon1').style.display = 'none';
  document.getElementById('neon2').style.display = 'none';
  document.getElementById('neon3').style.display = 'none';
  document.getElementById('neon4').style.display = 'none';
  document.getElementById(tmp).style.display = 'block';
}

function hideNeon( tmp ) {
  document.getElementById(tmp).style.display = 'none';
}

function changeBg( tmp, bg ) {
  if (document.getElementById(tmp)){
    document.getElementById(tmp).style.background = 'url("'+bg+'") top left no-repeat';
  }
}

function changeMap(val) {
  if (val == 0) {
    document.getElementById('kraj').style.visibility = 'hidden';
  } 
  else {
    document.getElementById('kraj').src = '../template/images/obsah/mapa_'+val+'.png';
    document.getElementById('kraj').style.visibility = 'visible';
  }
}