Как сделать перенаправление после отправки формы?

<form action="http://www.oplata.info/asp/pay.asp" method="POST" name="contactForm" onsubmit="return isEmailCorrect('contactForm', 'email')">
                            <input type="hidden" name="type_curr" value="WMR">
                            <input type="hidden" name="id_goods" value="999999">
                            <input name="id_agent" type="hidden" value="99999">
                            <input name="failpage" type="hidden" value="http://domain.ru/">
    <input type="text" name="email"><br>
    <input type="hidden" value="112" name="tovid"><br>
    Подписаться на новости:<br>
<input type="checkbox" value="on" name="quest">
                            <button type="submit" name="send_email" class="button-continue" ><strong>Продолжить</strong> &rarr;</button>
                        </form>