js屏蔽pc端访问

<script type="text/javascript">

    //平台、设备和操作系统

    var system ={

        win : false,

        mac : false,

        xll : false

    };

    //检测平台

    var p = navigator.platform;

    system.win = p.indexOf("Win") == 0;

    system.mac = p.indexOf("Mac") == 0;

    system.x11 = (p == "X11") || (p.indexOf("Linux") == 0);

    if(system.win||system.mac||system.xll){  

        window.location.href="pc端访问的链接";

    }else{

    }

</script>