一个登陆窗口的记数判断登录（有用哦），了解"IF"语句的用应

<%
n=0
adminID=Request("adminID")
password=Request("password")
if adminID="" then %>
<script language=vbscript>
MsgBox "错误：请输入管理员用户名！"
location.href = "javascript:history.back()"
</script>
<%elseif password="" then%>
<script language=vbscript>
MsgBox "错误：请输入你的密码！"
location.href = "javascript:history.back()"
</script>
<%end if%>
<!--#include file="connect.asp" -->
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
<%
'session.timeout=10'session对象的超时值
'on error resume next
Set conn = Server.CreateObject("ADODB.Connection")
conn.Open "Driver={Microsoft Access Driver (*.mdb)}; DBQ=" & Server.MapPath("examination.mdb")
Set rs = Server.CreateObject("ADODB.Recordset")
%>
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
<%rs.Open "Select * From 管理 where adminID='"&adminID&"'", conn, 3,3%>
<% if rs.bof or rs.eof then%>
<script language=vbscript>
MsgBox "错误：该用户名不存在，请确认你是管理员！"
location.href = "javascript:history.back()"
</script>
<% elseif rs("password")<>password then%>

<% if rs("登陆次数")>3 then %>
<script language=vbscript>
MsgBox "错误：登录次数太多!系统将关闭!"
location.href="javascript:window.close()"
</script>
<% else %>
<script language=vbscript>
MsgBox "<% =rs("登陆次数")%>错误：该密码不正确，请确认你是管理员！"