ASP开发中有用的函数(function)集合(1)_ASP教程

<%
'*************************************
'防止外部提交
'*************************************
function ChkPost()
dim server_v1,server_v2
chkpost=false
server_v1=Cstr(Request.ServerVariables("HTTP_REFERER"))
server_v2=Cstr(Request.ServerVariables("SERVER_NAME"))
If Mid(server_v1,8,Len(server_v2))<>server_v2 then
chkpost=False
else
chkpost=True
end If
end function

'*************************************
'IP过滤
'*************************************
function MatchIP(IP)
on error resume next
MatchIP=false
Dim SIp,SplitIP
for each SIp in FilterIP
SIp=replace(SIp,"*","/d*")
SplitIP=split(SIp,".")
Dim re, strMatchs,strIP
Set re=new RegExp
re.IgnoreCase =True
re.Global=True
re.Pattern="("&SplitIP(0)"|).""("&SplitIP(1)"|).""("&SplitIP(2)"|).""("&SplitIP(3)"|)"
Set strMatchs=re.Execute(IP)
strIP=strMatchs(0).SubMatches(0) & "." & strMatchs(0).SubMatches(1)& "." & strMatchs(0).SubMatches(2)& "." & strMatchs(0).SubMatches(3)
if strIP=IP then MatchIP=true:exit function
Set strMatchs=Nothing
Set re=Nothing
next
end function

'*************************************
'获得注册码
'*************************************
Function getcode()
getcode= "<img src=""common/getcode.asp"" alt="""" style=""margin-right:40px;""/>"
End Function

'*************************************
'限制上传文件类型
'*************************************
Function IsvalidFile(File_Type)
IsvalidFile = False
Dim GName
For Each GName in UP_FileType
If File_Type = GName Then
IsvalidFile = True
Exit For
End If
Next
End Function

'*************************************
'检测是否只包含英文和数字
'*************************************
Function IsValidChars(str)
Dim re,chkstr
Set re=new RegExp
re.IgnoreCase =true
re.Global=True
re.Pattern="[^_/.a-zA-Z/d]"
IsValidChars=True
chkstr=re.Replace(str,"")
if chkstr<>str then IsValidChars=False
set re=nothing
End Function

'*************************************
'检测是否只包含英文和数字
'*************************************
Function IsvalidValue(ArrayN,Str)
IsvalidValue = false
Dim GName
For Each GName in ArrayN
If Str = GName Then
IsvalidValue = true
Exit For
End If
Next
End Function

'*************************************
'检测是否有效的数字
'*************************************
Function IsInteger(Para)
IsInteger=False
If Not (IsNull(Para) Or Trim(Para)="" Or Not IsNumeric(Para)) Then
IsInteger=True
End If
End Function

'*************************************
'用户名检测
'*************************************
Function IsValidUserName(byVal UserName)
on error resume next
Dim i,c
Dim VUserName
IsValidUserName = True
For i = 1 To Len(UserName)
c = Lcase(Mid(UserName, i, 1))
If InStr("!<>?#^%@~`&*();:+='""　 ", c) > 0 Then
IsValidUserName = False
Exit Function
End IF
Next
For Each VUserName in Register_UserName
If UserName = VUserName Then
IsValidUserName = False
Exit For
End If
Next
End Function

'*************************************
'检测是否有效的E-mail地址
'*************************************
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
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

'*************************************
'加亮关键字
'*************************************
Function highlight(byVal strContent,byRef arrayWords)
Dim intCounter,strTemp,intPos,intTagLength,intKeyWordLength,bUpdate
if len(arrayWords)<1 then highlight=strContent:exit function
For intPos = 1 to Len(strContent)
bUpdate = False
If Mid(strContent, intPos, 1) = "<" Then
On Error Resume Next
intTagLength = (InStr(intPos, strContent, ">", 1) - intPos)
if err then
highlight=strContent
err.clear
end if
strTemp = strTemp & Mid(strContent, intPos, intTagLength)
intPos = intPos + intTagLength
End If
If arrayWords <> "" Then
intKeyWordLength = Len(arrayWords)
If LCase(Mid(strContent, intPos, intKeyWordLength)) = LCase(arrayWords) Then
strTemp = strTemp & "<span class=""high1"">" & Mid(strContent, intPos, intKeyWordLength) & "</span>"
intPos = intPos + intKeyWordLength - 1
bUpdate = True
End If
End If
If bUpdate = False Then
strTemp = strTemp & Mid(strContent, intPos, 1)
End If
Next
highlight = strTemp
End Function