https://www.loftboutik.com/mag/scripts/newsletter.js

1function subscribeNewsletter(store_id, email) {
2  if (email == null) {
3    if (document.getElementById("mail_newsletter") && document.getElementById("mail_newsletter").value != "") {
4      email = document.getElementById("mail_newsletter").value;
5    }
6  }
7
8  if (email != '') {
9    var xhr_object = null;
10    xhr_object = getHTTPObject();
11    xhr_object.open("GET", "/mag/newsletter.php?mail=" + email, true);
12
13    xhr_object.onreadystatechange = function () {
14      if (xhr_object.readyState == 4) {
15        var reponse = xhr_object.responseText;
16        if (reponse == "1") {
17          document.getElementById("alert_newslet_sub").style.display = "inline";
18        } else {
19          document.getElementById("alert_newslet_error").style.display = "inline";
20          document.getElementById("alert_newslet_sub").style.display = "none";
21        }
22      }
23    };
24
25    xhr_object.send(null);
26  } else {
27    document.getElementById("alert_newslet_error").style.display = "inline";
28  }
29}