asp防止垃圾留言代碼

<!--#include file="common/conn.asp"-->
<!--#include file="common/sub.asp"-->
<%
server_v1=Cstr(Request.ServerVariables("HTTP_REFERER"))
Response.Write(server_v1)
server_v2=Cstr(Request.ServerVariables("SERVER_NAME"))
if mid(server_v1,8,len(server_v2))<>server_v2 then
response.write "禁止外部提交資料"
response.end
end if

if len(request.form("frmContent"))>1000 then
response.write "輸入內容超過規定字元數目"
response.end
end if

if request.cookies("visitime")<>"" then
if DateDiff("s",request.cookies("visitime"),now())<60 then
response.write "請勿在1分鐘內重複提交評論"
response.end
end if
end if

count="六合彩,免費電影,安利,http,www"
connts = split(connt,",")
For each glword in connts
if instr(request.form("frmcontent"),glword)<>0 then
response.write "該關鍵字已被過濾"
response.end
end if
next

Dim UserNam,Comments
Dim fieldlist,Valuelist
UserName = Request.Form("UserName")
Comments = Request.Form("Comments")
newsid = Request.Form("newsid")
If UserName = "" Or Comments = "" Then
Response.Write("姓名或者內容沒有填寫")
Response.End()
End If
fieldlist = array("UserName","Comments","newsid")
valuelist = array(UserName,Comments,newsid)
Set objRs = Server.CreateObject("ADODB.recordset")
objRs.open "Feedback",objConn,1,2
objRs.addnew fieldlist,valuelist
closeI()
response.cookies("visitime")=now()
response.Redirect(server_v1)
%>