回答

通过ocalStorage.getItem和setItem来实现，代码如下：

<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,initial-scale=1.0,maximum=1.0,minimum=1.0,user-scalable=0" />
    <title>BFW NEW PAGE</title>
    <script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/jquery.17.js"></script>

    <style>
        #notice{
            width: 100px;
            position: fixed;
            padding: 10px;
            top:30%;
            left: 40%;
            height: 60px;
            background: white;
            display: none;
            }
    </style>
</head>

<body>

    <div id="notice">
        新手提示
    </div>



    <script>
          $(function(){
   
                var isshow = localStorage.getItem('isshow');
                if (isshow== null) {
                    localStorage.setItem('isshow', 1);
             
                    // Show popup here
                    $('#notice').show();
                }
                else{
               
              }

        });
    </script>
</body>

</html>