function spoiler(el) {
  var sp = document.getElementById('sp' + el);
  var spoiler = document.getElementById('spoiler' + el);
  if (spoiler.style.display == 'none') {
    spoiler.style.display = 'block';
    sp.innerHTML = '(<a href="#" onClick="spoiler(\'' + el + '\'); return false">' + LANG.SpoilerHide + '</a>)';
  }else {
    spoiler.style.display = 'none';
    sp.innerHTML = '(<a href="#" onClick="spoiler(\'' + el + '\'); return false">' + LANG.SpoilerShow + '</a>)';
  }
}