older text" id="input-attribute-1">

    <input type="checkbox" checked="checked" id="checkbox-1">
    <input type="checkbox" id="checkbox-2">

    <input name="email" value="test@example.com">
    <input name="username" value="testuser">

    <select name="number" value="one">
      <option value="one">One</option>
      <option value="two">Two</option>
      <option value="three">Three</option>
    </select>

    <button id="show-hidden" onClick="showHidden()">Show!</button>
    <div id="hidden" style="di