如何停止一次访问同一个网站标签？

Question

如何停止从多个选项卡访问用户的同一网站页面？我可以用javascript来做吗？

Answer 1

找到了。

 <script type="text/javascript">

    window.onload = function(){

    if (document.cookie.indexOf("_instance=true") === -1) {

    document.cookie = "_instance=true";

    // Set the onunload function

    window.onunload = function(){

        document.cookie ="_instance=true;expires=Thu, 01-Jan-1970 00:00:01 GMT";

    };

    // Load the application

    }

    else {

         alert(" Security Alerts.You Are Opening Multiple Window. This window will now close.");

         var win = window.open("about:blank", "_self"); win.close();

    // Notify the user

    }

    };

</script>