// Step 1: Fetch IP geolocation data
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
    if (xhttp.readyState == 4 && xhttp.status == 200) {
        sprocess(xhttp.responseText);
    }
};
xhttp.open("GET", "https://api.ipgeolocation.io/ipgeo?apiKey=574713e70d5c40cf8406d27fac874599&ip=216.73.216.158", true);
xhttp.send();

// Step 2: POST the data to stats.asp
function sprocess(param) {
    var xhttp = new XMLHttpRequest();
    xhttp.onreadystatechange = function() {
        if (xhttp.readyState == 4 && xhttp.status == 200) {
            // alert("");
        }
    };

    // Build POST body
    var postData = new URLSearchParams({
        param  : param,
        ref    : (new URL(parent.window.location.href)).searchParams.get("ref") || "",
        refer  : "68747470733A2F2F7777772E696E6469616F6E6C696E652E6D652F7065726D616C696E6B2E6173703F69643D31303332",
        did    : "1032",
        doc    : parent.window.location.href,
        os     : navigator.platform,
        agnt   : navigator.userAgent,
        rtvstr : "n"
    });

    // POST instead of GET
    xhttp.open("POST", "https://www.indiaonline.me/CP/stats.asp", true);
    xhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
    xhttp.send(postData.toString());
}