window.addEventListener("DOMContentLoaded", function () {
            var form = document.getElementById("captcha-form");
            document.getElementById("captcha-submit-button").addEventListener("click", function () {
                var submitButton = this;
                var submitSpinner = document.getElementById('captcha-submit-spinner');
                submitButton.style.display = 'none';
                submitSpinner.style.display = 'inline-flex';
                form.submit();
                return false;
            });
            document.getElementById("captcha-input").focus();
        });