Code for reverting (partially) OnPay's order form to classic look

code.html

<script type="text/javascript">
$(document).ready(function() {
	$("#submit-order").hide();
	$("#payment_form").show();
	$("#payment_form").submit(function(event) {
		event.preventDefault();
		return false;
	});

	$("#total_amount").change(function() {
		var totalAmount = $(this).val();
		if (totalAmount > 0) {
			$("#submit-order").hide();
			$("#payment_form").show();
		} else {
			$("#submit-order").show();
			$("#payment_form").hide();
		}
	});

	$("#submit-payment").click(function(event) {
		event.preventDefault();
		if (!$("#order_form").valid()) return;
		if (!$("#payment_form").valid()) return;
		
		Spinner.show(Lang.get("order.spinner_text"));

		var formData = new FormData($("#order_form")[0]);

		$.ajax({
			url: baseUrl + modulePath + "order/submit",
			data: formData,
			processData: false,
			contentType: false,
			type: "POST",
			dataType: "json"
		}).done(function(data) {
			if (data.op === "payment") {
				$("#sale_id").val(data.id);
				$("#payment_form")[0].submit();
			} else {
				window.scrollTo(0, 0);
				window.location.reload();
			}
		}).fail(function() {
			window.scrollTo(0, 0);
			window.location.reload();
		});
		
		return false;
	});
});
</script>