function hover_navigace(objekt, action) {
 if(action == "over") {
  objekt.style.backgroundColor = '#82cff4';
  //objekt.style.color = 'white';
 }
 if(action == "out") {
  objekt.style.backgroundColor = '';
  //objekt.style.color = '';
 }
}

function slepy_odkaz(rubrika) { 
 var podnabidka = document.getElementById("submenu-"+rubrika);
 if (podnabidka.style.display == "none") {
  podnabidka.style.display = 'block';
 } else {
  podnabidka.style.display = 'none';
 }
}