[Vlasenko Fedor]

<select id="jform_state" name="jform[state]" class="inputbox chzn-done" size="1" onchange="listupdate()">
      <option value="1" selected="selected">=ON</option>
      <option value="0">=OFF</option>
    </select>
    <hr>
    <select class="chzn-done" id="jform_audio_id_audiocategory" name="jform[audio_id_audiocategory]">
      <option value="1" selected="selected">Диктор</option>
      <option value="2">Джингл</option>
      <option value="3">Реклама</option>
    </select>
    <script>
      listupdate = function () {
        document.getElementById('jform_audio_id_audiocategory').options[0].selected = true;
      }
    </script>