We have seen a lot of sites having tabs.This can be done using the Ajax tabcontainer control

<ajax:TabContainer Id="tabContainer" runat="server" Height="506px" Width="100%"

style="margin-right: 86px" ActiveTabIndex="0" >

<ajax:TabPanel runat="server" HeaderText="TabPanel1" ID="TabPanel1">

<HeaderTemplate>

TabPanelName//Just add a name according to your need

</HeaderTemplate>

<ContentTemplate>

Name

<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

<asp:Button ID="Button1" runat="server" Text="Button" />

</ContentTemplate>

</ajax:TabPanel>

</ajax:TabContainer>

Note that the tabcontainer prefix starts with ajax( ajax:TabContainer>).
The prefix is the same as that given when the namespace was registered.

TabContainer

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