取文件扩展名，随机文件名的asp函数

Function FileExt(fileName)
  FileExt = Mid(fileName,Instr(fileName,".")+1,Len(fileName)-Instr(fileName,"."))
End Function

Function getExt(fileName)
  fileName = Right(text,inStrRev(fileName,".")-1)
  getExt = fileName
End Function

Function FileExtenName(byVal FileName)
  Dim regEx
  Set regEx = New RegExp
  regEx.Pattern = "^.*(\.[^\.]*)$"
  regEx.Global = False
  regEx.IgnoreCase = True
  FileExtenName = regEx.Replace(FileName, "$1")
  Set regEx = Nothing
End Function

Function Generator(Length)
  dim i,tempS,v
  dim c(39)
  tempS = ""
  c(1) = "a": c(2) = "b": c(3) = "c": c(4) = "d": c(5) = "e" : c(6) = "f": c(7) = "g"
  c(8) = "h": c(9) = "i": c(10) = "j": c(11) = "k": c(12) = "l": c(13) = "m": c(14) = "n"
  c(15) = "o": c(16) = "p": c(17) = "q": c(18) = "r": c(19) = "s": c(20) = "t": c(21) = "u"
  c(22) = "v": c(23) = "w": c(24) = "x": c(25) = "y": c(26) = "z": c(27) = "1": c(28) = "2"
  c(29) = "3": c(30) = "4": c(31) = "5": c(32) = "6": c(33) = "7": c(34) = "8": c(35)  = "9"
  c(36) = "-": c(37) = "_": c(38) = "@": c(39) = "!"
  If isNumeric(Length) = False Then
    Response.Write "Error"
    Exit Function
  End If
  For i = 1 to Length
    Randomize
    v = Int((39 * Rnd) + 1)
    tempS = tempS & c(v)
  Next
  Generator = tempS
End Function