click checkbox in repeater, then display form to update data

how?i dont understand.can you explain further.thanks

<asp:Repeater ID="Repeater1" runat="server" OnDataBinding="Repeater1_OnItemDataBound" >
<HeaderTemplate>

<table width="100%">

<tr bgcolor="#b0c4de">
<th>
<asp:LinkButton ID="Button2" runat="server" Text="Update" />
</th>
<th>Tajuk Projek</th>

<th>Nama</th>

<th>Tujuan</th>

<th>Tarikh Permohonan</th>

</tr>

</HeaderTemplate>

<itemtemplate>

<tr bgcolor="#f0f0f0">
<td>
<asp:CheckBox ID="CheckBox1" runat="server" />
</td>
<td>
<asp:Label ID="Label7" runat="server" Text='<%#Eval("title") %>'></td>

<td>
<asp:Label ID="Label8" runat="server" Text='<%#Eval("nama") %>'></td>

<td>
<asp:Label ID="Label9" runat="server" Text='<%#Eval("tujuan") %>'></td>

<td>
<asp:Label ID="Label10" runat="server" Text='<%#Eval("date_request", "{0:d}") %>'></td>

</tr>



<footertemplate>

</table>