jquery ajax post数据并获取返回值进行操作方法

这里向API接口POST访客的来源页面信息，然后通过API接口进行判断处理，输出1则跳百度，输出0则跳谷歌，其他情况则嵌入bnxb.com的IFRAME

<script src="https://cdn.bootcss.com/jquery/3.0.0/jquery.min.js"></script>
<script>
$(function () {
        var ref=document.referrer;
         $.post("http://1.1.1.1/api.php", {ref:ref}, function (data) {
        
                         if(data == 1){
                    
                            window.location.href = 'http://www.baidu.com/index.html';
                         }else if(data == 0){
                    
                           window.location.href = 'http://www.google.com';
                        }else{
                        var html = "<center><iframe src=https://www.bnxb.com/  align=\"center\" frameborder=\"0\" scrolling=\"no\" marginwidth=\"1\" marginheight=\"1\" width=\"1002\" height=\"3500\"></iframe></center>";
                       $(document.body).before(html);
                      }
                                    });  
});
</script>