'**************************************************
'函数名：isvalidemail
'作 用：检查email地址合法性
'参 数：email ----要检查的email地址
'返回值：true ----email地址合法
' false ----email地址不合法
'**************************************************
function isvalidemail(email)
dim names, name, i, c
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
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
if left(names(1),1) ="+" 0 then
isvalidemail = false
exit function
end if
if right(names(1),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
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原函数修改自动易网站管理系统4.03 function.asp
