asp 非法关键词过滤程序

Public Function FilterBadWord(str)
  If str = "" Or IsNull(str) Then
   FilterBadWord = ""
   Exit Function
  End If
  Dim i,badWordSplit,filterSplit
  badWordSplit = Split(Cfg.badWordFilter,"|")
  For i = 0 To UBound(badWordSplit)
   filterSplit = Split(badWordSplit(i),",")
   If InStr(1,str,filterSplit(0),1) Then str = Replace(str,filterSplit(0),filterSplit(1))
  Next
  FilterBadWord = str
 End Function

'使用方法
dim stra
stra = FilterBadWord(request.Form(fom))