asp防止重复留言

session("time")=now()
const a=#0:0:4# '定义相隔之间的秒数
if session("time2") >0 then '如果有值
if session("time2")+a > session("time") then '
session("time2")=now()
response.redirect "look.asp"
end if
end if
session("time2")=now()