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                <h3>Приклад використання тегу <code>optgroup</code></h3>
<p id="text"></p>
<p><select  name="type">
   <optgroup label="Українські письменники">
    <option value="Ліна Костенко">Ліна Костенко</option>
    <option value="Тарас Шевченко">Тарас Шевченко</option>
    <option value="Ольга Кобилянська">Ольга Кобилянська</option>
   <optgroup label="Зарубіжні письменники">
    <option value="Анна Ахматова">Анна Ахматова</option>
    <option value="Чарлз Діккенс">Чарлз Діккенс</option>
    <option value="Вільям Шекспір">Вільям Шекспір</option>
 <input type="button" value="Обрати" onClick="dataSelect(this.form)">




                text.innerHTML ="Улюблений письменник: ";

function dataSelect(f) {
      n = f.type.selectedIndex;
      text.innerHTML ="Улюблений письменник: " + f.type.options[n].value;