https://budvarkadejvice.cz/templates/smarty/gourmet/scripts/php/contact-form.js

1/*
2 --------------------------------
3 Ajax Contact Form
4 --------------------------------
5 + https://github.com/pinceladasdaweb/Ajax-Contact-Form
6 + A Simple Ajax Contact Form developed in PHP with HTML5 Form validation.
7 + Has a fallback in jQuery for browsers that do not support HTML5 form validation.
8 + version 1.0.1
9 + Copyright 2014 Pedro Rogerio
10 + Licensed under the MIT license
11 + https://github.com/pinceladasdaweb/Ajax-Contact-Form
12 */
13
14function sendAjaxForm(form)
15{
16    $(form).find(".cf-loader").show();
17    var formData = $(form).serialize();
18    // process the form
19    $.ajax({
20        type: 'POST',
21        url: $(form).attr("action"),
22        data: formData,
23        dataType: 'json',
24        encode: true
25    }).done(function (data) {
26        if (!data.success) {
27            // Error
28            $(form).find(".error-box").show();
29        } else {
30            // Success
31            $(form).html($(form).find(".success-box").html());
32        }
33        $(form).find(".cf-loader").hide();
34    }).fail(function (data) {
35        // Error
36        $(form).find(".error-box").show();
37        $(form).find(".cf-loader").hide();
38    });
39}
40
41(function ($, window, document, undefined) {
42    'use strict';
43
44    $(document).ready(function () {
45        $('.form-ajax').each(function (index) {
46            var form = this;
47
48            $(form).submit(function (e) {
49                e.preventDefault();
50                // remove the error class
51                $('.form-group').removeClass('has-error');
52                $('.help-block').remove();
53                if (typeof grecaptcha !== 'undefined') {
54                    var $captchaResponse = $(form).find('textarea[name="g-recaptcha-response"]');
55                    var token = $captchaResponse.val();
56
57                    if (!$captchaResponse.length || !token) {
58                        // není odškrtnuto / není vyřešená CAPTCHA
59                        $(form).find(".error-box")
60                            .text('Prosím, potvrďte, že nejste robot.')
61                            .show();
62                        return false;
63                    }
64                }
65
66                sendAjaxForm(form);
67
68
69            });
70        });
71    });
72
73}(jQuery, window, document));