asp三级联动

<%
Set Conn = Server.CreateObject("ADODB.Connection")
Conn.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="&Server.Mappath("db1.mdb")
'=========================================================
'表
'---------------------------------------------------------
'大类：F_Class 字段:Class_ID,Class_Name
'小类：F_nClass 字段:nClass_ID,nClass_Name,ClassID
'细目：F_Item 字段:Item_ID,Item_Name,nClass_ID.Class_ID
'---------------------------------------------------------
'测试Page
'---------------------------------------------------------
'Request.form("FClass")
'Request.form("FnClass")
'Request.form("FItem")
'=========================================================
%>