Untitled

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>payments page</title>
    <style>
        #tab-div {
            float:left;
            width:30%;
            height:100%;
            background-color:red;
            text-align:center
        }
        #form-div {
            float:right;
            width:70%;
            height:100%;
            background-color:blue;
        }
        .table-cell {
            padding: 15px 15px 15px 15px;
            text-align:center;
        }
    </style>
</head>
<body>
    <form id="payments_form" runat="server">
        <div style="width:100%; height:100%">
            <div id="tab-div">
                <asp:Table runat="server" CellPadding="10" Width="100%">
                    <asp:TableRow runat="server">
                        <asp:TableCell runat="server" Text="Cell1" Width="100%" CssClass="table-cell"/>
                    </asp:TableRow>
                    <asp:TableRow runat="server">
                        <asp:TableCell runat="server" Text="Cell2"  Width="100%" CssClass="table-cell"/>
                    </asp:TableRow>
                </asp:Table>
            </div>
            <div id="form-div">

            </div>
        </div>
    </form>
</body>
</html>