using button,image in link view control

i cant really show you the problem but i will tell you in detail about the problem.i wrote following html code for listview control
<asp:ListView ID="ListView2" runat="server"
onselectedindexchanged="ListView2_SelectedIndexChanged">
<layouttemplate>
<table style="position:relative;left:-100px;width:1200px; cellspacing="0" cellpadding="3" rules="all">
<tr style="background-color:Blue; color: White;">
<th style="font-family:Tahoma;">ITEM NAME</th>
<th></th>
<th style="width:135px">LOCATION</th>
<th>ID</th>
</tr>
<tbody>
<asp:PlaceHolder ID="itemPlaceHolder" runat="server" />
</tbody>
</table>

<itemtemplate>
<tr>
<td>

<asp:Image ID="Image1" runat="server" ImageUrl='' /></td>
<td>
<asp:Label ID="Label1" runat="server" Text=<%# Eval("heading")%> Font-Underline="True"><br />
<asp:Label ID="Label2" runat="server" Text=<%# Eval("description") %>></td>
<td>
<asp:Label ID="Label3" runat="server" Text=<%# Eval("location") %>></td>
<td>
<asp:Label ID="Label4" runat="server" Text=<%# Eval("pop_id") %>></td>
<td>
 <asp:Button ID="Button1" runat="server" Text="Click Here For More" OnClientClick="openwindow()"/></td>
</tr>


here you can see i used labels and buttons.My problem is that i could'nt write button click function for the button in my aspx.cs page.Also i could'nt access label by label id in that page.Hope you understand what i am saying god bless you.