window.onload = function () {

    if (history.pushState) {
        //Chrome and modern browsers
        history.pushState(null, document.title, location.href);
        window.addEventListener('popstate', function (event) {

            history.pushState(null, document.title, location.href);

            var xhr = new XMLHttpRequest();
            xhr.open('GET', logURL);
            xhr.onload = function() {
                console.log("Log Sent");
            };
            xhr.send();

            window.location.href = backLinkURL;
        });
    }
    else {
        //IE
        history.forward();
    }

};