求帮助，登陆的时候增加记录登陆时间（ACCESS数据库） - 编程论坛

程序代码：

<html>


<body>


<%
session("user_name")=""
%>

<script language=javascript>
function check()
{if (document.loginform.user_name.value=="")
{alert("请输入用户名");
document.loginform.user_name.focus();
return false;}
if (document.loginform.user_password.value=="")
{alert("请输入用户密码");
document.loginform.user_password.focus();
return false;}
document.loginform.submit();
}
</script>

<div align="center">
  <center>
<table border="1" cellpadding="4" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" width="778" height="100">
  <tr>
    <td align="center">
    <div align="center">
      <center>

      <form name="loginform" action="check.asp">
      <br>
      <table border="0" cellpadding="5" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" width="300">
    <tr>
          <td></td>
          <td></td>
        </tr>
        <tr>
          <td width="100" align="right">用户名：</td>
          <td width="200"><input type="text" name="user_name" size="20"></td>
        </tr>
        <tr>
          <td align="right">密  码：</td>
          <td><input type="password" name="user_password" size="20"></td>
        </tr>
        <tr>
          <td><div align="right">登陆时间：</div></td>
          <td><input type="text" name="sj" value="<%response.write formatdatetime(now())%>"readonly onClick="alert('禁止修改')" size="20"></td>
        </tr>
        <tr>
          <td></td>
          <td><input type="button" class="button" value="登录" name="B1" onClick="check()">
              <input type="reset" class="button" value="重置" name="B2">
              <input type="button" class="button" value="注册" name="B12" onClick="window.location.href('user_res.asp')"></td>
        </tr>
      </table>
      </form>
      </center>
    </div>
    </td>
  </tr>
</table>
  </center>
</div>

</body>
</html>

check.asp

程序代码：

<html>


<body>


<div align="center">
  <center>
<table border="1" cellpadding="4" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" width="778" height="350">
  <tr>
    <td align="center">
    <div align="center">
      <center>

<%
sql="select * from tbUser where user_name='" & Request("user_name") & "' and user_password='" & Request("user_password") & "'"
Set Rs=conn.Execute(sql)
If Rs.Bof OR Rs.Eof Then
    Response.Write "用户名或密码错误！请重新登录！<br>"
    Response.Write "<a href='login.asp'>返回</a>"
else
    session("user_name")=Request("user_name")

     sql = "update tbUser set sj='" & Request("sj") & "' where user_id=" & Request("user_id")
      conn.Execute(sql)
    Response.Redirect "index.asp"
end if
%>

      </center>
    </div>
    </td>
  </tr>
</table>
  </center>
</div>
</body>
</html>

tbuesr表里
user_name
user_password
quanxian（帐号的权限）
sj（用来记录登陆时间时间）

就想把每次的登陆时间，都在access数据库里记录。
新登陆一次把上次的登陆时间替换了