function showService(id) {
  var service = 'service_' + id;
  
  if ($(service)) {
    var active_service = 'service_' + $('active_service').value;
    if ($(active_service)) {
      $(active_service).removeClassName("active");
      $('service_description_' + $('active_service').value).hide();
    }

    if (id != 0) {
      $(service).addClassName("active");
    }
    
    $('service_description_' + id).show();
    $('active_service').value = id;
  }
}

function showLanguages(show) {
  if (show === true) {
    $('language_box').addClassName('show');
    //$('language_box').show();
    //$('language_box_top').show();
  } else {
    $('language_box').removeClassName('show');
    //$('language_box').hide();
    //$('language_box_top').hide();
  }
}