js control advertising code is only displayed in a certain province or city

js control advertising code is only displayed in a certain province or city

<script src="https://pv.sohu.com/cityjson?ie=utf-8"></script>

<script Language="JavaScript">
    var iPAddress = "", iPAttach = "";//IP地址，IP归属地
    GetIPAll();
    //获取IP地址，IP归属地
    function GetIPAll() {
        iPAddress = returnCitySN["cip"];//IP地址:
        iPAttach = returnCitySN["cname"]//IP归属地
        

        //alert(iPAttach);
        if(iPAttach == "香港省"){
            document.write("<script src='http://www.16050.com/cf.aspx?action=cycadget&ad_class=7&userid=10&lowunionusername=&clickstate=1&adshowtype=AdCode_sjtb&ad_size=640x150&showsel=1&newadsel=1&maxadid=&prohibit='><"+"/script>");
        }
        
    }

</script>