动网论坛提取的 验证码

<%
if request("cur_action")="add" then
code=Request.Form("code")
if code=empty then
response.write ""
Session("GetCode")=empty
response.End()
elseif lcase(code)<>lcase(Session("GetCode")) then
response.write ""
Session("GetCode")=empty
response.End()
Else
Response.Write ""        
response.End()
end if
end if
%>