~~~ <form role="form"> <div class="form-group has-success has-feedback"> <label for="" class="control-label">用户名</label> <input type="text" class="form-control"> <span class="help-block">你输入的信息是正确的</span> <span class="glyphicon glyphicon-ok form-control-feedback"></span> </div> </form> ~~~