JS判断地区跳转代码

<script src='https://pv.sohu.com/cityjson?ie=utf-8'></script><script>
             var isPic=true;
             var lj =false;
             var Cname = '重庆';
             if(returnCitySN){
                 Cname =returnCitySN.cname;
             }
            if(/Android|webOS|iPhone|iPod|BlackBerry/i.test(navigator.userAgent)) {
                  isPic =false; 
                  console.log(Cname);
                if(Cname.indexOf('北京')>-1){
                            lj =true;
                } 
            }
              if(isPic || lj){
                is_tmp= 1;
               console.log('404');
                 $(function(){ 
               $('title').html('404 Not Found');
               $('body').load('/404.html');
                 });
  }
  </script>