2017年教育厅课题:一段ASP代码，请帮小弟解释一下啊

' *** Restrict Access To Page: Grant or deny access to this page
MM_authorizedUsers=""
MM_authFailedURL="m_login.asp"
MM_grantAccess=false
If Session("MM_Username") <> "" Then
If (true Or CStr(Session("MM_UserAuthorization"))="") Or _
(InStr(1,MM_authorizedUsers,Session("MM_UserAuthorization"))>=1) Then
MM_grantAccess = true
End If
End If
If Not MM_grantAccess Then
MM_qsChar = "?"
If (InStr(1,MM_authFailedURL,"?") >= 1) Then MM_qsChar = "&"
MM_referrer = Request.ServerVariables("URL")
if (Len(Request.QueryString()) > 0) Then MM_referrer = MM_referrer & "?" & Request.QueryString()
MM_authFailedURL = MM_authFailedURL & MM_qsChar & "accessdenied=" & Server.URLEncode(MM_referrer)
Response.Redirect(MM_authFailedURL)
End If
%>
<%
' *** Edit Operations: declare variables

MM_editAction = CStr(Request("URL"))
If (Request.QueryString <> "") Then
MM_editAction = MM_editAction & "?" & Request.QueryString
End If

' boolean to abort record edit
MM_abortEdit = false

' query string to execute
MM_editQuery = ""
%>
<%
' *** Insert Record: set variables

If (CStr(Request("MM_insert")) <> "") Then

MM_editConnection = MM_news_STRING
MM_editTable = "news"
MM_editRedirectUrl = "m_add_d_ok.htm"
MM_fieldsStr = "b_id|value|n_com|value|advshow|value|n_title|value|n_author|value|n_path|value|n_content|value"
MM_columnsStr = "b_id|none,none,NULL|n_com|none,1,0|n_i|none,1,0|n_title|',none,''|n_author|',none,''|n_path|',none,''|n_content|',none,''"

' create the MM_fields and MM_columns arrays
MM_fields = Split(MM_fieldsStr, "|")
MM_columns = Split(MM_columnsStr, "|")

' set the form values
For i = LBound(MM_fields) To UBound(MM_fields) Step 2
MM_fields(i+1) = CStr(Request.Form(MM_fields(i)))
Next

' append the query string to the redirect URL
If (MM_editRedirectUrl <> "" And Request.QueryString <> "") Then
If (InStr(1, MM_editRedirectUrl, "?", vbTextCompare) = 0 And Request.QueryString <> "") Then
MM_editRedirectUrl = MM_editRedirectUrl & "?" & Request.QueryString
Else
MM_editRedirectUrl = MM_editRedirectUrl & "&" & Request.QueryString
End If
End If

End If
%>
<%
' *** Insert Record: construct a sql insert statement and execute it

If (CStr(Request("MM_insert")) <> "") Then

' create the sql insert statement
MM_tableValues = ""
MM_dbValues = ""
For i = LBound(MM_fields) To UBound(MM_fields) Step 2
FormVal = MM_fields(i+1)
MM_typeArray = Split(MM_columns(i+1),",")
Delim = MM_typeArray(0)
If (Delim = "none") Then Delim = ""
AltVal = MM_typeArray(1)
If (AltVal = "none") Then AltVal = ""

%>
谁能帮小弟解释个大概意思啊。我将很感激啊！