I've built a User Control with this layout code:
<asp:Panel ID="panelShape" runat="server" CssClass="fcShape" BorderStyle="None" style="position:absolute">
<table style="border-collapse:collapse; border-width:0">
<tr>
<td>
<asp:Panel ID="panelUL" runat="server" BackColor="Salmon" />
</td>
<td>
<asp:Panel ID="panelUR" runat="server" BackColor="Wheat" />
</td>
</tr>
<tr>
<td>
<asp:Panel ID="panelLL" runat="server" BackColor="LightGreen" />
</td>
<td>
<asp:Panel ID="panelLR" runat="server" BackColor="MediumAquamarine" />
</td>
</tr>
</table>
</as ...
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