技术资料 > ASP技术 > ASP技巧 : 检测表单输入EMAIL的合法性

检测表单输入EMAIL的合法性

March 25,2004

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