<%
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'ASP通用防注入代码                                   
'您可以把该代码COPY到头文件中.也可以单独作
'为一个文件存在,每次调用使用                      
'作者:y3gu - 2005-7-29                               
'http://www.dosu.cn                                 
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Dim GetFlag Rem(提交方式)
Dim ErrorSql Rem(非法字符)
Dim RequestKey Rem(提交数据)
Dim ForI Rem(循环标记)
ErrorSql = "'~;~and~(~)~exec~update~count~*~%~chr~mid~master~truncate~char~declare" Rem(每个敏感字符或者词语请使用半角 "~" 格开)
ErrorSql = split(ErrorSql,"~")
If Request.ServerVariables("REQUEST_METHOD")="GET" Then
GetFlag=True
Else
GetFlag=False
End If
If GetFlag Then
  For Each RequestKey In Request.QueryString
   For ForI=0 To Ubound(ErrorSql)
    If Instr(LCase(Request.QueryString(RequestKey)),ErrorSql(ForI))<>0 Then
    response.write "<script>alert(""警告:\n请不要使用敏感字符"");location.href=""Sql.asp"";</script>"
    Response.End
    End If
   Next
  Next
Else
  For Each RequestKey In Request.Form
   For ForI=0 To Ubound(ErrorSql)
    If Instr(LCase(Request.Form(RequestKey)),ErrorSql(ForI))<>0 Then
    response.write "<script>alert(""警告:\n请不要使用敏感字符"");location.href=""Sql.asp"";</script>"
    Response.End
    End If
   Next
  Next
End If
%>

第二个

Function Checkstr(Str)
If Isnull(Str) Then
CheckStr = ""
Exit Function
End If
Str = Replace(Str,Chr(0),"", 1, －1, 1)
Str = Replace(Str, """", """, 1, －1, 1)
Str = Replace(Str,"<；","<；", 1, －1, 1)
Str = Replace(Str,">；",">；", 1, －1, 1)
Str = Replace(Str, "script", "script", 1, －1, 0)
Str = Replace(Str, "SCRIPT", "SCRIPT", 1, －1, 0)
Str = Replace(Str, "Script", "Script", 1, －1, 0)
Str = Replace(Str, "script", "Script", 1, －1, 1)
Str = Replace(Str, "object", "object", 1, －1, 0)
Str = Replace(Str, "OBJECT", "OBJECT", 1, －1, 0)
Str = Replace(Str, "Object", "Object", 1, －1, 0)
Str = Replace(Str, "object", "Object", 1, －1, 1)
Str = Replace(Str, "applet", "applet", 1, －1, 0)
Str = Replace(Str, "APPLET", "APPLET", 1, －1, 0)
Str = Replace(Str, "Applet", "Applet", 1, －1, 0)
Str = Replace(Str, "applet", "Applet", 1, －1, 1)
Str = Replace(Str, "[", "[")
Str = Replace(Str, "]", "]")
Str = Replace(Str, """", "", 1, －1, 1)
Str = Replace(Str, "=", "=", 1, －1, 1)
Str = Replace(Str, "’", "’’", 1, －1, 1)
Str = Replace(Str, "select", "select", 1, －1, 1)
Str = Replace(Str, "execute", "execute", 1, －1, 1)
Str = Replace(Str, "exec", "exec", 1, －1, 1)
Str = Replace(Str, "join", "join", 1, －1, 1)
Str = Replace(Str, "union", "union", 1, －1, 1)
Str = Replace(Str, "where", "where", 1, －1, 1)
Str = Replace(Str, "insert", "insert", 1, －1, 1)
Str = Replace(Str, "delete", "delete", 1, －1, 1)
Str = Replace(Str, "update", "update", 1, －1, 1)
Str = Replace(Str, "like", "like", 1, －1, 1)
Str = Replace(Str, "drop", "drop", 1, －1, 1)
Str = Replace(Str, "create", "create", 1, －1, 1)
Str = Replace(Str, "rename", "rename", 1, －1, 1)
Str = Replace(Str, "count", "count", 1, －1, 1)
Str = Replace(Str, "chr", "chr", 1, －1, 1)
Str = Replace(Str, "mid", "mid", 1, －1, 1)
Str = Replace(Str, "truncate", "truncate", 1, －1, 1)
Str = Replace(Str, "nchar", "nchar", 1, －1, 1)
Str = Replace(Str, "char", "char", 1, －1, 1)
Str = Replace(Str, "alter", "alter", 1, －1, 1)
Str = Replace(Str, "cast", "cast", 1, －1, 1)
Str = Replace(Str, "exists", "exists", 1, －1, 1)
Str = Replace(Str,Chr(13),"<；br>；", 1, －1, 1)
CheckStr = Replace(Str,"’","’’", 1, －1, 1)
End Function