求助，一个asp登陆界面源码，它限制登录，请大家看看。
程序代码： <title>网站后台管理系统</title>
<link href="../Css/AdminLogin.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<form id="form1" runat="server">
<div id="wrap">
<div id="loginBox">
<ul>
<li> <label>本站域名：</label> <asp:Label ID="LB_Domain" runat="server" Text="本站域名"></asp:Label>
</li>
<li><label for="TxtUserName">管理员名称：</label>
<input name="Txt_UserName" runat="server" type="text" maxlength="20" id="Txt_UserName" class="inText" />
</li>
<li><label for="TxtPassword">管理员密码：</label>
<input name="Txt_UserPwd" runat="server" type="password" maxlength="20" id="Txt_UserPwd" class="inText" />
</li>
<li id="LiSiteManageCode" class="text">
<label for="TxtAdminValidateCode">验 证 码：</label>
<input name="Txt_Code" runat="server" maxlength="20" id="Txt_Code" class="inText" style="width:50px;" />
<img alt="验证码" id="ImgValidateCode" src="/AspxPage/ValidateCode.aspx" title="点此刷新验证码！" style="cursor:pointer;" onclick="this.src='/AspxPage/ValidateCode.aspx?'+Math.round(Math.random()*10000);" /> <span onclick="document.getElementById('ImgValidateCode').src='/AspxPage/ValidateCode.aspx?'+Math.round(Math.random()*10000);">刷新</span>
</li>
</ul>
<div id="buttonBar">
<asp:CheckBox ID="CB_AutoLogin" runat="server" CssClass="AutoLogin"
Text="下次自动登录！" Visible="False" />
<asp:ImageButton ID="IBut_Enter" runat="server"
ImageUrl="/Image/Default/login_button.gif" onclick="IBut_Enter_Click" />
</div>
</div>
</div>
</form>
</body>
</html>验证登陆条件的asp是哪个文件？
