怎么防止网站被SQL注入

换源代码吧，不安全的大都是免费源代码

<%
dim sql_injdata,SQL_inj,SQL_Get,SQL_Data,Sql_Post
SQL_injdata = "'|and|exec|insert|select|delete|update|count|chr|master|truncate|char|declare"
SQL_inj = split(SQL_Injdata,"|")
If Request.QueryString<>"" Then
For Each SQL_Get In Request.QueryString
For SQL_Data=0 To Ubound(SQL_inj)
if instr(LCase(Request.QueryString(SQL_Get)),Sql_Inj(Sql_DATA))>0 Then
Response.Write "<Script Language=javascript>alert('注意：请不要提交非法请求！');history.back(-1)</Script>"
Response.end
end if
next
Next
End If
If Request.Form<>"" Then
For Each Sql_Post In Request.Form
For SQL_Data=0 To Ubound(SQL_inj)
if instr(LCase(Request.Form(Sql_Post)),Sql_Inj(Sql_DATA))>0 Then
Response.Write "<Script Language=javascript>alert('注意：请不要提交非法请求！');history.back(-1)</Script>"
Response.en