HTML Table scrolling

I am trying to develop an ASP.NET page which contains a table which acts in a similar way to a spreadsheet such as Excel. Esentially I am trying to get the left column of the table, as well as the top row of the table to stay fixed, whilst the rest of the table scrolls.

I know of the THEAD feature of HTML4 - so the top row remains, but I can't find a way to get the left column to remain fixed.

The page needs only be run on IE6. Does anyone have any ideas?

Thanx in advance
Rob