All UserControls inside Tabcontainer gets loaded on Tab Select

Question

Hi,

I have used 5 TabPanels with UserControls inside TabPanel of Tabcontainer using as

asp:TabContainer ID="TabContainer1" runat="server">

                <asp:TabPanel ID="TbPersonal" runat="server" HeaderText="Personal" ScriptPath="">

                    <ContentTemplate>

                        <div class="clientArea">

                            <uc1:PersonalInfo ID="PersonalInfo1" runat="server" />

                        </div>

                    </ContentTemplate>

                </asp:TabPanel>

            </asp:TabContainer>

When i click select dropdown inside "PersonalInfo" UserControl, Page_load event of all the 5 User Controls get loaded.

how to stop loading the other 4 User Controls.