我是个初学者请各位高人指点一下小弟不清楚的代码谢谢

<%@LANGUAGE="VBSCRIPT" CODEPAGE="936"%>//什么意识？
//什么意识？
<%
Dim index_login
Dim index_login_numRows

Set index_login = Server.CreateObject("ADODB.Recordset")
index_login.ActiveConnection = MM_database_STRING//这整句是做什么的？MM_database_STRING好像没被赋过值啊？
index_login.Source = "SELECT name, password FROM user"
index_login.CursorType = 0//这一段index_login.都是什么意识?
index_login.CursorLocation = 2
index_login.LockType = 1
index_login.Open()

index_login_numRows = 0
%>
<%
' *** Validate request to log in to this site.
MM_LoginAction = Request.ServerVariables("URL")//什么意识?
If Request.QueryString<>"" Then MM_LoginAction = MM_LoginAction + "?" + Server.HTMLEncode(Request.QueryString)
MM_valUsername=CStr(Request.Form("username"))//cstr()是干什么的?
If MM_valUsername <> "" Then
  MM_fldUserAuthorization=""
  MM_redirectLoginSuccess="succeed.asp"//这个地方是什么意识?
  MM_redirectLoginFailed="index.asp"//这个地方是什么意识?
  MM_flag="ADODB.Recordset"
  set MM_rsUser = Server.CreateObject(MM_flag)
  MM_rsUser.ActiveConnection = MM_database_STRING//这个是什么意识？MM_database_STRING他又是什么？
  MM_rsUser.Source = "SELECT name, password"
  If MM_fldUserAuthorization <> "" Then MM_rsUser.Source = MM_rsUser.Source & "," & MM_fldUserAuthorization
  MM_rsUser.Source = MM_rsUser.Source & " FROM user WHERE name='" & Replace(MM_valUsername,"'","''") &"' AND password='" & Replace(Request.Form("password"),"'","''") & "'"
  MM_rsUser.CursorType = 0
  MM_rsUser.CursorLocation = 2
  MM_rsUser.LockType = 3
  MM_rsUser.Open
  If Not MM_rsUser.EOF Or Not MM_rsUser.BOF Then
    ' username and password match - this is a valid user
    Session("MM_Username") = MM_valUsername
    If (MM_fldUserAuthorization <> "") Then
      Session("MM_UserAuthorization") = CStr(MM_rsUser.Fields.Item(MM_fldUserAuthorization).Value)
    Else
      Session("MM_UserAuthorization") = ""
    End If
    if CStr(Request.QueryString("accessdenied")) <> "" And true Then
      MM_redirectLoginSuccess = Request.QueryString("accessdenied")
    End If
    MM_rsUser.Close
    Response.Redirect(MM_redirectLoginSuccess)
  End If
  MM_rsUser.Close
  Response.Redirect(MM_redirectLoginFailed)
End If
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";>
<html xmlns="http://www.w3.org/1999/xhtml";>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title></title>
<link href="css/style.css" rel="stylesheet" type="text/css">
<style type="text/css">

</style>
</head>

<body><form ACTION="<%=MM_LoginAction%>" method="POST" name="login" id="login" onSubmit="MM_validateForm('username','','R','password','','R');return document.MM_returnValue">//onSubmit这段都什么意识?
<br />
<table width="30%" height="150" border="0" align="center" cellpadding="0" cellspacing="0" class="border20">
          <tr align="center">
            <td height="30" colspan="2">系统入口</td>
          </tr>
          <tr>
            <td width="40%" align="right">用户名：</td>
            <td width="60%" height="30">
              <input name="username" type="text" class="form01" id="username" size="15">            </td>
          </tr>
          <tr>
            <td align="right">密码：</td>
            <td height="30">
              <input name="password" type="password" class="form01" id="password" size="15"></td>
          </tr>
          <tr align="center">
            <td height="30" colspan="2">
              <input class="border21" type="submit" name="Submit" value="[ 登陆 ]">
            </td>
          </tr>
  </table>


      </form>
</body>
</html>[/size][/size]

这里面用MM开头的很多都是变量吗？为什么没定义？

[此贴子已经被作者于2007-12-23 19:05:33编辑过]

*快速回复：我是个初学者请各位高人指点一下小弟不清楚的代码谢谢 [ 回帖是一种美德 :) ]
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*快速回复：我是个初学者请各位高人指点一下小弟不清楚的代码谢谢 [ 回帖是一种美德 :) ]

会员账号

用户名：还没注册? 密码：忘记密码?

内容

HTML标签：不可用

UBB标签：可用

贴图标签：可用

多媒体标签：可用

表情字符转换：可用

上传图片：不可用

最多15KB

点击表情图即可在帖子中加入相应的表情