<form name="payment" action="https://interkassa.com/lib/payment.php" method="post" target="_top">
<input type="hidden" name="ik_shop_id" value="6BC4534E-A868-200E-8E02-659C6B6D802D">
<input type="hidden" name="ik_payment_amount" value="1.00">
<input type="hidden" name="ik_payment_id" value="PAYMENT_ID">
<input type="hidden" name="ik_payment_desc" value="PAYMENT_DESCRIPTION">
<input type="submit" name="process" value="Оплатить">
</form>