如何实现网上考试？

login.asp

' 考生验证.
<％@ Language=VBScript％>
<％
name=trim(request("name"))
passwd=trim(request("passwd"))
if name<>"" and passwd<>"" then

' 检查考生是否输入用户名和密码.
Set conn = Server.CreateObject("ADODB.Connection")
conn.Open "driver={Microsoft Access Driver(＊.mdb)};

dbq="＆ Server.MapPat("exercise.mdb")
set rs= server.createobject("adodb.recordset")
sql= "select ＊ from user where user=
'" ＆name＆"' and passwd='" ＆ passwd ＆"'"
Set rs= conn.Execute(sql)

' 验证考生合法性.
if not(rs.eof) then
if rs("score")<>0 then

' 检查考生是否已参加过考试,若是则进行成绩查询.
response.write rs("user")＆"的考试成绩是"＆rs("score")
else
session("pass")=1
session("user")=name
response.redirect "test.asp"
end if
else
Response.Write "噢,您输入的用户名或密码不正确!"
end if
else
end if
％>

test.asp

' 从题库中取题考试.
<％@ Language=VBScript ％>
<％
if session("pass")<>1 then
response.redirect "login.asp"
else
end if
Set conn = Server.CreateObject("ADODB.Connection")
conn.Open "driver={Microsoft Access Driver (＊.mdb)};
dbq="＆ Server.MapPath("exercise.mdb")
sql="select ＊ from test"
Set rs = conn.Execute( sql )

' 提取试题.
％>

' 以上是一个计时函数.