function ZobrSmenu(mid,pocsm){
  var s_mid = "s"+mid+"_";
  var smid = "";
  for(i = 0 ; i < pocsm ; i++){
    smid = s_mid+i;
    if(document.getElementById(smid)){
      if(document.getElementById(smid).className == "sm nev") document.getElementById(smid).className = "sm vid";
      else document.getElementById(smid).className = "sm nev";
    }
  }
}