请教一个问题textbox.text 在类方法引用问题 - 编程论坛

运行提示hairclor=tbhair.Text对非共享成员的引用要求对象引用，是什么原因，类方法不能直接引用还是那里出错，请帮帮忙？

<HTML>
    <HEAD>
        <script language="VB" runat="server">
CLASS cx
   public hairclor as string
   public eyeclor as string
   public birthday as date
sub setmyself(Sender As Object, E As EventArgs)
hairclor=tbhair.Text
eyeclor=tbeye.Text
birthday=date(tbbir.Text)
   end sub
end class
sub  btSubmit_click(Sender As Object, E As EventArgs)
dim week as integer
week=birthday.dayofweek
response.write(hairclor&eyeclor）
end sub

        </script>
    </HEAD>
    <BODY bgcolor="#cccccc">
        <font size="5">Sam's Teach Yourself in 21 Days: Day 2, Exercise 1</font><hr>
        <p>
            <form runat="server" ID="Form1">
                hair:
                <asp:textbox id="tbhair" runat="server" />
                eye:
                <asp:textbox id="tbeye" runat="server" />
                <asp:button id="btSubmit" Text="Submit" OnClick="btSubmit_Click" runat="server" />
                <P>
                    birthday:
                    <asp:TextBox id="tbbir" runat="server"></asp:TextBox>
                        </P>
                <P> </P>
                <P> </P>
            </form>
    </BODY>
</HTML>