on>
         <h4 class="alert-heading">Oh snap! You got an error!</h4>
         <p>Change this and that and try again. Duis mollis, est non commodo luctus, nisi erat porttitor ligula, eget lacinia odio sem nec elit. Cras mattis consectetur purus sit amet fermentum.</p>
         <p>
            <a class="btn btn-danger" href="#">Take this action</a> <a class="btn" href="#">Or do this</a>
         </p>
      </div>
   </div>


   <hr class="bs-docs-separator">


   <h2>Usage</h2>
   <p>Enable dismissal of an 