asp检测邮箱的合法性

<%
dim email
email=request.form("email")
if IsValidEmail(email) then
if request("action")="退订" then
response.redirect "del_email.asp?email="&email
else
response.redirect "add_email.asp?email="&email
end if
else
'response.write "无效的电子邮件格式，请按“后退”按钮，重填一个有效的Email"
response.write"<SCRIPT language=JavaScript>alert('无效的电子邮件格式，请重填一个有效的Email！');"
response.write"javascript:history.go(-1)</SCRIPT>"
end if

function IsValidEmail(email)

dim names, name, i, c

'Check for valid syntax in an email address.

IsValidEmail = true
names = Split(email, "@")
if UBound(names) <> 1 then
   IsValidEmail = false
   exit function
end if
for each name in names
   if Len(name) <= 0 then
     IsValidEmail = false
     exit function
   end if
   for i = 1 to Len(name)
     c = Lcase(Mid(name, i, 1))
     if InStr("abcdefghijklmnopqrstuvwxyz_-.", c) <= 0 and not IsNumeric(c) then
       IsValidEmail = false
       exit function
     end if
   next
   if Left(name, 1) = "." or Right(name, 1) = "." then
      IsValidEmail = false
      exit function
   end if
next
if InStr(names(1), ".") <= 0 then
   IsValidEmail = false
   exit function
end if
i = Len(names(1)) - InStrRev(names(1), ".")
if i <> 2 and i <> 3 then
   IsValidEmail = false
   exit function
end if
if InStr(email, "..") > 0 then
   IsValidEmail = false
end if

end function
%>

补充：asp教程,ASP入门