SELECT
t1.id
FROM
`user` t1
JOIN otvety t2 ON t2.id_user = t1.id
JOIN voprosy t3 ON t3.id = t2.id_vopr
JOIN
(
SELECT
id_cat,
count(*) AS voprosy_count
FROM
voprosy
GROUP BY
id_cat
) t4 ON t4.id_cat = t3.id_cat
GROUP BY
t1.id,
t3.id_cat,
t4.voprosy_count
HAVING count(t3.id_cat) = t4.voprosy_count
Мне не понятно как используя е.preventDefault() закрыть форму и обновить страницу, ну или просто закрыть.
<form name="feedback" method="post" id="fb" action="../send_mail.php">
<span class="cls_fb"></span>
<input type="text" name="name" placeholder="name" pattern="[a-Zа-Я]" required="required"><br>
<input type="text" name="phone" placeholder="phone"><br>
<input type="email" name="email" placeholder="email" required="required"><br>
<input type="submit" name="submit" value="Отправить">
</form>
Покажи код showpage()