<form class="form-signin" role="form"> <input type="text" class="form-control" placeholder="用户名" required autofocus /> <input type="password" class="form-control" placeholder="密码" required /> <button class="btn btn-lg btn-warning btn-block" type="submit">登录</button> <label class="checkbox"> <input type="checkbox" value="remember-me"> 记住我 </label> </form> </div>
