asp.net里面的身份验证和授权

sp;        <asp:requiredfieldvalidator id="RequiredFieldValidator1" runat="server" ErrorMessage="用户名不能为空！" ControlToValidate="tbName"></asp:requiredfieldvalidator></TD>
                    </TR> 中.国.站.长.站
                    <TR>
                        <TD>
                            <asp:label id="Label2" runat="server">密码：</asp:label></TD>
                        <TD>
                            <asp:textbox id="tbPass" runat="server" Width="183px"></asp:textbox></TD>
                        <TD>

站.长.站

                            <asp:requiredfieldvalidator id="RequiredFieldValidator2" runat="server" ErrorMessage="密码不能为空！" ControlToValidate="tbPass"></asp:requiredfieldvalidator></TD>
                    </TR>
                    <TR>
                        <TD><FONT face="宋体">是否保存Cookie</FONT></TD>
                        <TD>

站长.站

                            <asp:checkbox id="PersistCookie" runat="server"></asp:checkbox></TD>
                        <TD></TD>