var pageid = ahc_ajax_front.page_id;
var page_id = (pageid.length > 0) ? pageid : ''; 
var pagetitle = ahc_ajax_front.page_title;
var page_title = (pagetitle.length > 0) ? pagetitle : ''; 
var posttype = ahc_ajax_front.post_type;
var post_type = (posttype.length > 0) ? posttype : ''; 
var referer = document.referrer;
var useragent = window.navigator.userAgent;
var servername = location.hostname;
var hostname = location.host;
var request_uri = location.pathname.substring(1);

var xhttp = new XMLHttpRequest();

xhttp.open("POST", ahc_ajax_front.ajax_url, true);
xhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xhttp.send("action=ahcfree_track_visitor&page_id="+ page_id +"&page_title="+ page_title + "&post_type="+ post_type + "&referer="+ referer +"&useragent="+ useragent +"&servername="+ servername +"&hostname="+ hostname +"&request_uri="+request_uri);