Function getIpvalue(clientIP)'得到客户端的IP转换成长整型，返回值getIpvalue

On Error Resume Next

Dim strIp, array_Ip

strIp=0

array_Ip = Split(clientIP,".")

If UBound(array_Ip)<>3 Then

getIpvalue=0

Exit Function

End If

For i=0 To 3

strIp=strIp+(CInt(array_Ip(i))*(256^(3-i)))

Next

getIpvalue=strIp

If Err Then getIpvalue=0

End Function

clientIP=request.ServerVariables("REMOTE_HOST")

IpValue=getIpvalue(clientIP)

strSql="select top 1 City from [Ipaddress] where "&IpValue&"

between Ip1 and Ip2"

Set RsIp=conn.execute(strSql)

If RsIp.bof and RsIp.eof then

UrlCity="未知"

Else

UrlCity=RsIp.Fields.Item("City").Value

End If

if instr(UrlCity,"广州")<>0 then

response.Redirect("http://www.jb51.net")

end if

if instr(UrlCity,"深圳")<>0 then

response.Redirect("http://img.jb51.net")

end if

if instr(UrlCity,"上海")<>0 then

response.Redirect("http://xiazai.jb51.net")

end if

所用到的IP数据库可以去网上down一个回来