原理同php的那篇http://www.okadwin.com/?post=68

这个就直接上代码了，没什么好说的，该说的都写在注释里了

<%
function GetBot()
'查询蜘蛛
dim s_agent
GetBot=""
s_agent=Request.ServerVariables("HTTP_USER_AGENT") '关键判断语句
if instr(1,s_agent,"googlebot",1) >0 then
GetBot="google"
end if
if instr(1,s_agent,"msnbot",1) >0 then
GetBot="MSN"
end if
if instr(1,s_agent,"slurp",1) >0 then
GetBot="Yahoo"
end if
if instr(1,s_agent,"baiduspider",1) >0 then
GetBot="baidu"
end if
if instr(1,s_agent,"sohu-search",1) >0 then
GetBot="Sohu"
end if
if instr(1,s_agent,"lycos",1) >0 then
GetBot="Lycos"
end if
if instr(1,s_agent,"robozilla",1) >0 then
GetBot="Robozilla"
end if
end function
Function getHTTPPage(Path)
t = GetBody(Path)
getHTTPPage=BytesToBstr(t,"GB2312")'编码
End function
Function Newstring(wstr,strng)
Newstring=Instr(lcase(wstr),lcase(strng))
if Newstring<=0 then Newstring=Len(wstr)
End Function
Function GetBody(url)
on error resume next
Set Retrieval = CreateObject("Microsoft.XMLHTTP")
With Retrieval
.Open "Get", url, False, "", ""
.Send
GetBody = .ResponseBody
End With
Set Retrieval = Nothing
End Function
Function BytesToBstr(body,Cset)
dim objstream
set objstream = Server.CreateObject("adodb.stream")
objstream.Type = 1
objstream.Mode =3
objstream.Open
objstream.Write body
objstream.Position = 0
objstream.Type = 2
objstream.Charset = Cset
BytesToBstr = objstream.ReadText
objstream.Close
set objstream = nothing
End Function
Dim wstr,str,url,start,over,dtime
if GetBot="baidu" then
'给百度蜘蛛定制的内容
url="http://www.hccbbs.com"
'想要展示给蜘蛛的页面地址
wstr=getHTTPPage(url)
body=wstr
response.write ""&body&""
response.end
elseif GetBot="google" then
'给google 蜘蛛定制的内容
url="http://www.hccbbs.com"
wstr=getHTTPPage(url)
body=wstr
response.write ""&body&""
response.end
end if
if instr(Request.ServerVariables("http_referer"),"www.baidu.com")>0 then
'如果用户来自www.baidu.com
response.redirect("http://www.hccbbs.com/")
'跳转指定地址
end if
%>

上面代码不是我原创，因为我不会asp，但是又需要这方面的东西，所以去网上找了一些资料，东拼西凑加上调试，总算是组合出了这么个能用的玩意出来。不敢独享，速速发了出来。