django-simple-captcha ajax refresh button

django-simple-captcha-ajax-refresh-button.js

        /*
        * Credits go to https://stackoverflow.com/a/20371801/8504344, https://stackoverflow.com/users/179024/mw
        */
        $(document).ready(function () {
            // Add refresh button after field (this can be done in the template as well)
            $('img.captcha').after(
                $('<a href="#void" class="captcha-refresh"><i class="fa fa-refresh"></i></a>')
            );

            // Click-handler for the refresh-link
            $('.captcha-refresh').click(function () {
                var $form = $(this).parents('form');
                var url = location.protocol + "//" + window.location.hostname + ":"
                    + location.port + "/captcha/refresh/";

                // Make the AJAX-call
                $.getJSON(url, {}, function (json) {
                    $form.find('input[name="captcha_0"]').val(json.key);
                    $form.find('img.captcha').attr('src', json.image_url);
                });

                return false;
            });
        });