HTML Table: Fixed column and row header - column offset using <center>

In a table there are column header and row headers.   The first row displayed in the table should be fixed that is when you scroll the table vertically the top row remains at the top.   The first column also needs to be fixed; that is, when you scroll horizontaly the first column remains at the far left potiion.

Using multiple table solution supplied :
http://www.cubido.at/Portals/7/docs/Blog/Karin/HTML%20and%20Javascript/ResizeColumns/Table.htm

This sample fails to align the column headers correctly (offset by 1/2 the scrollbar width) when I use <center> to center the table (and any other elements i desire to have on the form).
e.g. by encasing the sample in the following form
<form>
<center>

               <h1>Fixed Headers (resize window to view scrollbars)</h1>
               <table border=0 cellspacing=0 cellpadding=0 width=80% >
               <tr><td>
............... sample coding of scrollable table
              </td></tr>
              </table>
</center>
</form>