<%@LANGUAGE="VBSCRIPT"%>

<%
' *** Validate request to log in to this site.
MM_LoginAction = Request.ServerVariables("URL")
If Request.QueryString<>"" Then MM_LoginAction = MM_LoginAction + "?" + Request.QueryString
MM_valUsername=CStr(Request.Form("name"))
If MM_valUsername <> "" Then
MM_fldUserAuthorization=""
MM_redirectLoginSuccess="index.asp"
MM_redirectLoginFailed="false.asp"
MM_flag="ADODB.Recordset"
set MM_rsUser = Server.CreateObject(MM_flag)
MM_rsUser.ActiveConnection = MM_register_STRING
MM_rsUser.Source = "SELECT name, password,realname" ' 加入字段：realname
If MM_fldUserAuthorization <> "" Then MM_rsUser.Source = MM_rsUser.Source & "," & MM_fldUserAuthorization
MM_rsUser.Source = MM_rsUser.Source & " FROM register WHERE name='" & MM_valUsername &"' AND password='" & CStr(Request.Form("password")) & "'"
MM_rsUser.CursorType = 0
MM_rsUser.CursorLocation = 2
MM_rsUser.LockType = 3
MM_rsUser.Open
If Not MM_rsUser.EOF Or Not MM_rsUser.BOF Then
' username and password match - this is a valid user
Session("MM_Username") = MM_valUsername
session("MM_UserRealName") = MM_rsUser("RealName") '纪录字段：realname
session("logo") = true
If (MM_fldUserAuthorization <> "") Then
Session("MM_UserAuthorization") = CStr(MM_rsUser.Fields.Item(MM_fldUserAuthorization).value)
Else
Session("MM_UserAuthorization") = ""
End If
if CStr(Request.QueryString("accessdenied")) <> "" And false Then
MM_redirectLoginSuccess = Request.QueryString("accessdenied")
End If
MM_rsUser.Close
Response.Redirect(MM_redirectLoginSuccess)
End If
MM_rsUser.Close
Response.Redirect(MM_redirectLoginFailed)
End If
%>
这是ud产生的代码！能不能请大虾为我解释一下这个程序的涵义

本来是可以解释的，不过太费时间和精力，所以就不解释了,自己慢慢领悟吧
顺便想说一下,,既然你这么有兴趣想了解ud产生的代码，我建议你先学习asp，这样你自己就可以搞定了。我现在还非常喜欢用手工写代码的，用ud不过是它可以节省编网页的时间而已。