ASP显示用户IP代码，怎么写

ASP显示用户IP代码，怎么写
您的IP是：*.*.*.*

<%Private Function getIP() 
Dim strIPAddr 
If Request.ServerVariables("HTTP_X_FORWARDED_FOR") = "" OR InStr(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), "unknown") > 0 Then 
strIPAddr = Request.ServerVariables("REMOTE_ADDR") 
ElseIf InStr(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), ",") > 0 Then 
strIPAddr = Mid(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), 1, InStr(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), ",")-1) 
ElseIf InStr(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), ";") > 0 Then 
strIPAddr = Mid(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), 1, InStr(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), ";")-1) 
Else 
strIPAddr = Request.ServerVariables("HTTP_X_FORWARDED_FOR") 
End If 
getIP = Trim(Mid(strIPAddr, 1, 30)) 
End Function 
ip=getIP() 
response.write(ip) 
%>