asp验证email格式合法性的函数

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