Passing form variables 2 or 3 pages forward

Here is the scene. I have a shopping basket that is cookie driven but on that page I have a discount word form. When you put a correct discount word it kicks this off on the same page and the discount values are calculated in the cookie javascript

Code:

---

<%Dim search1
If Request.Form("searchstring1") <> "" Then
        search1=request.form("searchstring1")
**Database connection stuff here**
        set rs=conn.execute("SELECT * FROM discount where discountword = '" & search1 & "'")
        If Not rs.EOF Then
                Session("DiscountAmount") = rs("discountamount")
                Session("DiscountValue") = rs("discountvalue")
                Session("Discountword") = rs("discountword")
        End If
End If
If Session("DiscountValue") = "" Then Session("DiscountValue") = "1"
If Session("DiscountAmount") = "" Then Session("DiscountAmount") = "0"
%>

---

You then go to checkout to put your name and address in and pick PAY, your get directed to a secure page to put cc details in. Once you have your order is added to a MySQL database. I need the discount word to appear in the MySQL database as well but this is inserted 2 or 3 pages after the discount word.

In the example about I have (wrongly or rightly) set it is a session variable. How do I use this on the page that is submitting to the MySQL db? As it's a session can I just use a <INPUT TYPE="hidden" NAME=" etc as normal or do I have to do something to jump the variable on across the page?

Please help.

Session variables should be persistent and accessible across the entire session. In other words you should be able to access the session varriable without a problem 2 or 3 pages out. As long as the time has not expired for that particular session.