<fieldset>
    <legend>Input Button</legend>
    <form>
      <p> Default button: <input type="button" class="btn" value="Click Me" /> </p>

      <p> Disabled Button: <input type="button" class="btn" value="I am disabled" disabled /> </p>

      <p>Button with <u><b>A</b></u>ccesskey: <input type="button" class="btn" value="Accesskey enabled" accesskey="a" /></p>

      <p>Button without style: <input type="button" value="I'm a basic button" /></p>
    </form>
</fieldset>

Output