rails form formatting for twitter bootstrap #2

bootstrap_style.html

<!-- without error -->
<div class="clearfix">
  <label for="bar">Bar</label>
  <div class="input">
    <input id="foo_bar" name="foo[bar]" size="30" type="text">
  </div>
</div>
    
<!-- with error -->
<div class="clearfix error">
  <label for="bar">Bar</label>
  <div class="input error">
    <input id="foo_bar" name="foo[bar]" size="30" value="" type="text">
    <span class="help-inline"></span>
  </div>
</div>