var back_url = "https://b.toudum.com/click.php?key=rqn3xgfdlll6c4gm37br&t_domain=lavieapres.fr&source=back_button&offer=ketocharge";

var hash = location.hash.replace('#', '');
var url = window.location.href;

if (hash) {
  url = window.location.href.replace('#' + hash, '');
}

history.replaceState(null, document.title, url + "#!/history");
history.pushState(null, document.title, url);

window.addEventListener("popstate", function () {
  if (location.hash === "#!/history") {
    history.replaceState(null, document.title, location.pathname);
    setTimeout(function () {
      location.replace(back_url);
    }, 0);
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}, false);