<ext:FormPanel runat="server" ID="pForm">
        <Items>
            <ext:Panel runat="server" ID="panel1" Cls="x-form-invalid">
                <Content>
                    <table>
                        <tr>
                            <td>
                                userName
                            </td>
                            <td>
                                <ext:TextField ID="txtUserName" runat="server" AllowBlank="false" MsgTarget="Side">
                                </ext:TextField>
                            </td>
                            <td>
                                sex
                            </td>
                            <td>
                                <ext:TextField ID="TextField1" runat="server" AllowBlank="false" MsgTarget="Side">
                                </ext:TextField>
                            </td>
                        </tr>
                    </table>
                </Content>
                <Listeners>
                    <AfterRender Handler="#{panel1}.body.addClass('x-form-invalid');" />
                </Listeners>
            </ext:Panel>
        </Items>
        <Buttons>
            <ext:Button runat="server" Text="Save">
                <Listeners>
                    <Click Handler="alert(#{pForm}.getForm().isValid())" />
                </Listeners>
            </ext:Button>
        </Buttons>
    </ext:FormPanel>
the code above does'nt work .
#{pForm}.getForm().isValid() always return true, i don't know how to solve it,
shall i use asp.net validation webcontrol? pls help me .