asp防止垃圾留言代码

<!--#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 "禁止外部提交数据" 
 response.end 
end if 

if len(request.form("frmContent"))>1000 then 
 response.write "输入内容超过规定字符数目" 
 response.end 
end if 

if request.cookies("visitime")<>"" then 
 if DateDiff("s",request.cookies("visitime"),now())<60 then 
  response.write "请勿在1分钟内重复提交评论" 
  response.end 
 end if 
end if 


count="六合彩,免费电影,安利,http,www" 
connts = split(connt,",") 
For each glword in connts 
 if instr(request.form("frmcontent"),glword)<>0 then 
 response.write "该关键字已被过滤" 
 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("姓名或者内容没有填写")
 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)
%> 

</div>