function switch_radio(formId) {
 var prepinaciPole = document.getElementById(formId);
 for(var i = 0; i< prepinaciPole.length; i++) {
  if(prepinaciPole[i].checked) {
   top.document.location.replace('?'+prepinaciPole[i].name+'='+prepinaciPole[i].value);
  }
 }
}

function switch_form(pole) {
 var stranka = document.getElementById(pole).options[document.getElementById(pole).selectedIndex].value;
 if (stranka > "")
  top.document.location.replace(stranka);
 return false;
}

function disableSumbitFormButton(pole, notice){
 document.getElementById(pole).disabled = true;
 document.getElementById(pole).value = notice;
 return true;
}

function toggle_element(el) {
  var myelement = document.getElementById(el);

  if( !myelement.style.display || myelement.style.display == "none" ) {
   myelement.style.display = "block"
  } else {
    myelement.style.display = "none";
  }
}
function toggleTable(el) {
  toggle_element(el);
}

// drive definovana funkce, ktera otevirala obrazku v novem okne
function Zvets() {

}

function voteByLabelClick(id) {
  var i, labels, form;
  // najdeme formular
  form = document.getElementById(id);
  // budeme pokracovat jedine, pokud jsme nasli formular
  if (form) {
    // formulari priradime tridu "voteByLabel", pres kterou je v CSS definovano skryti
    // radiobuttonu a obarveni labelu tak, aby vypadaly jako odkazy
    form.className += ' voteByLabelClick';
    // najdeme labely
    labels = form.getElementsByTagName('label');
    for (i = 0; i < labels.length; i++) {
      // kazdemu opet priradime na onclick funkci, ktera odesle formular
      labels[i].onclick = function () {
        if (form.onsubmit instanceof Function && false === form.onsubmit()) {
          return false;
        }
        // nastaveni radiu pro tuto volbu checked na true
        document.getElementById(this.htmlFor).checked = true;
        form.submit();
      }
    }
  }
}