function setProductID(id,cls) {
	document.form_teiki[0].product_id.value = id;
    document.form_teiki[0].classcategory_id1.value = cls;
	document.form_teiki[0].action = "/proact/products/detail.php?product_id=" + id + "&secret=on";
	document.form_teiki[0].submit();
}

function checkPaymentType() {
    var elements;
    var payment_type;

    elements = document.form1;
    payment_type = elements.payment_type.value;

    if(payment_type == "指定回数払い") {
        elements.select_number.disabled = false;
    } else {
        elements.select_number.disabled = true;
    }
}