https://www.sartorirestaurant.com/wp-content/plugins/newsletter/subscription/validate.js?ver=5.1.1

1function newsletter_check_field(field, message) {
2    if (!field) return true;
3    if (field.type == "checkbox" && !field.checked) {
4        alert(message);
5        return false;
6    }
7        
8    if (field.required !== undefined && field.required !== false && field.value == "") {
9        alert(message);
10        return false;
11    }
12    return true;
13}
14
15function newsletter_check(f) {
16    var re = /^([a-zA-Z0-9_\.\-\+])+\@(([a-zA-Z0-9\-]{1,})+\.)+([a-zA-Z0-9]{2,})+$/;
17    if (!re.test(f.elements["ne"].value)) {
18        alert(newsletter.messages.email_error);
19        return false;
20    }
21    if (!newsletter_check_field(f.elements["nn"], newsletter.messages.name_error)) return false;
22    if (!newsletter_check_field(f.elements["ns"], newsletter.messages.surname_error)) return false;
23    
24    for (var i=1; i<newsletter.profile_max; i++) {
25        if (!newsletter_check_field(f.elements["np" + i], newsletter.messages.profile_error)) return false;
26    }
27    
28    if (!newsletter_check_field(f.elements["ny"], newsletter.messages.privacy_error)) return false;
29    
30    return true;   
31}