如何控制弹出一个NTLM验证窗口？

如何控制弹出一个ntlm验证窗口？

<%
response.status = "401 unauthorized"
response.addheader "www-authenticate","ntlm"
response.write "user=" & request.servervariables("logon_user") & "<br>"
response.write "用户登录"
response.end
%>