"layui-body layui-container">

        <div class="layui-container layui-col-md6 ">
            <hr class="layui-bg-blue">
            <h3 style="text-align: center; font-size: xx-large"> 用 户 借 书 </h3>
            <hr class="layui-bg-blue">
        </div>

        <div>
            <input class=" layui-input-block" placeholder="请输入书籍编号" autocomplete="off" autofocus
                   id="bookId" type="text" name="bookId">

            <button class="layui-btn layui-bg-blue" id="btn1">�