authenticate.asp
<%
Dim URL
URL = Request.QueryString
' 获得URL.
%>
<html>
<body>
<FORM METHOD=POST ACTION="/validate.asp">
<INPUT TYPE=HIDDEN NAME="URL" VALUE="<%=URL%>">
' 将URL保存到一个隐藏变量中.
用户名:
<INPUT TYPE=TEXT NAME="txtName">
口令:
<INPUT TYPE=PASSWORD NAME="txtPassword">
<INPUT TYPE=SUBMIT>
</FORM>
</body></html>
再用validate.asp文件获取传递给它的信息，从数据库中读取用户名和口令，以判断是否给用户授权。
validate.asp
<%
Dim strUserName, strPassword
strUserName = Request.form("txtName")
strPassword = Request.form("txtPassword")
' 从表单中读取用户名和口令.
' 建立数据库连接...
Dim strSQL
strSQL = "select * from ValidUsers WHERE UserName = " & _
strUserName & " AND Password = " & _
strPassword
' 进行SQL查询.
Dim rs
Set rs = Conn.Execute(strSQL)
If rs.EOF Then
' 如果recordset不为空, 则用户名有效.
Session("bolAuthenticated") = True
' 将bolAuthenticated 设为True.
Response.Redirect Request.form("URL")
' 将用户传递到来过的URL.
Else
Response.Redirect "/notvalidated.asp
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