Using Node traversal of js to find a field instance of repeater

<asp:repeater runat="server">
<ItemTemplate>
<tr class="TableDetail2">
<TD>
<input type =checkbox name="checkboxs" ID="checkbox" Runat="server" Width="15" value = '<%# ("mocode") %>'/>
</TD>
<td class="nowrap">
<asp:ImageButton runat="server" Width="15" ImageUrl="../image/" CommandName="btnkx"
Height="15"></asp:ImageButton>
<asp:TextBox runat="server" CssClass="TextBox1" Text='<%# ("itemtype") %>'>
</asp:TextBox></td>
<td class="nowrap">
<asp:ImageButton runat="server" Width="15" ImageUrl="../image/" CommandName="btnkxn"
Height="15"></asp:ImageButton>
<asp:TextBox runat="server" CssClass="TextBox1" Text='<%# ("itemname") %>'>
</asp:TextBox>
</td>
<td class="nowrap">
<asp:TextBox runat="server" CssClass="TextBox1" Text='<%# ("ysamount") %>'>
</asp:TextBox></td>
</tr>
</ItemTemplate>
</asp:repeater>