I can't think of a good way to retrieve the information for the second form bia any means other than to use server-side programming.
Here's a quick and not-optimized ASP sample for the second form:
Code:
<%
Dim Customer_Name
Customer_Name = trim (Request.Form ("Customer_Name")
%>
<input type="hidden" name="Customer_Name" value="<% = Customer_Name %>" />
This would vary depending on which server-side programming language you used.
There would be a way to do this using Javascript, but then you'd have to rely on people enabling it.