<p>
  <label for="select">Select</label><br />
  <select id="select">
    <option value="1">Option 1</option>
    <option value="2">Option 2</option>
    <option value="3">Option 3</option>
    <optgroup label="Subgroup">
      <option value="4">Option 4</option>
      <option value="5">Option 5</option>
    </optgroup>
  </select>
  </p>
  <p>
  <label for="selectmultiple">Multiselect</label><br />
  <select id="selectmultiple" multiple>
    <option value="1">Option 1</option>
    <option value="2">Option 2</option>
    <option value="3">Option 3</option>
    <option value="4">Option 4</option>
    <option value="5">Option 5</option>
    <option value="6">Option 6</option>
    <optgroup label="Subgroup">
      <option value="7">Option 7</option>
      <option value="8">Option 8</option>
    </optgroup>
  </select>
</p>