Hi,
You can use style with overflow property in div
<div id="Ord1" style="overflow:auto;Height:250;width:250" >
<asp:Panel ID="pnlOrd1" runat="server">
Dynamic HTML Tables....
</asp:Panel>
</div>
Here i fixed the height and width as 250px, when control inside the div cross the height or width scroll will automatically appears else disappear