h:30px"></i></span>
                <input type="password" class="form-control" name="password" autocomplete="off" placeholder="密码" pattern="required" />
            </div>

            <div class="form-group input-group input-group-lg">
                <span class="input-group-addon"><i class="fa fa-font" style="width:30px"></i></span>
                <input type="text" class="form-control" autocomplete="off" name='captcha' placeholder="验证码" pattern="required" />
                <span class="inpu