setTimeout(function(){
        
        var start;
        var end;
        var times = 0;
        var ip;
        var id;
        start = new Date();//用户进入时间
        //var ip = returnCitySN["cip"];
        var is_home = $('.is_home').val();
        setTimeout(function(){
           window.onbeforeunload = function() { 
                end = new Date(); //用户退出时间
                times = end.getTime() - start.getTime();
                times = Math.ceil(times / 1000); //取的是秒并且化整
               // var ip = document.write(returnCitySN["cip"]+','+returnCitySN["cname"]);
               //var ip = returnCitySN["cip"];
               ajaxNg(times);
           }
        },1000);
       
        function ajaxNg(times){
       
           $.ajax({
               url:"/mobile/index.php?m=user&c=login&a=getvisitdata",
               type:"post",
               data:{
                   residence_time:times+1, //停留时间
                   source_url: document.referrer, //来源url
                   ip: '3.145.74.54',
                   visit_url: window.location.href, //访问url
                   host: window.location.host,
                   is_home:is_home,
                   title:document.title
               },
               dataType:"json",
               success:function(res){
                   
               },
           })
        }
        ajaxNg(times);
    },1000);