<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <link href="//netdna.bootstrapcdn.com/bootstrap/3.1.0/css/bootstrap.min.css" id="bootstrap-css" rel="stylesheet" /><script src="//netdna.bootstrapcdn.com/bootstrap/3.1.0/js/bootstrap.min.js"></script><script src="//code.jquery.com/jquery-1.11.1.min.js"></script><!------ Include the above in your HEAD tag ----------> <div id="wrapper"> <div class="container"> <div class="row"> <div class="col-sm-12 col-md-12 col-lg-12"> <h1><span style="font-size:14px;">ĐĂNG KÝ NHẬN THÔNG BÁO KHI MỞ ĐƠN</span></h1> <div id="countdown"> </div> <form class="form-inline signup" role="form"> <div class="form-group"><input class="form-control" id="exampleInputEmail1" placeholder="Enter your email address" type="email" /></div> <p><button class="btn btn-theme" type="submit">Đăng ký ngay!</button></p> </form> </div> </div> <div class="row"> <div class="col-lg-6 col-lg-offset-3"> </div> </div> </div> </div>