$(function () {
    if(!window['captcha-handler-ready']){
        $(document).on('click', '.is-captcha-field a', function () {
            var captchaFieldWrapper = $(this).parents('.is-captcha-field');
            var blockName = captchaFieldWrapper.data('block-name');
            $.ajax({
                url: '/local/php_interface/ajax/captcha.php',
                type: 'post',
                data: 'captcha=yes',
                success: function(data){
                    captchaFieldWrapper.find('.'+blockName+'__captcha-img img').attr('src', '/bitrix/tools/captcha.php?captcha_sid=' + data);
                    captchaFieldWrapper.find('.'+blockName+'__inputs').children('input[name=captcha_sid]').val(data);
                }
            });

            return false;
        });
        window['captcha-handler-ready'] = true;
    }
});