[jQuery] Locking Column Heading or Locking Columns in a table

[davec]

When locking the column heading or locking a column on a scrollable
table, I generally use code like the two following css parameters but
I cannot figure out how to do this via jQuery. Could someone please
give me a clue?

To lock a column heading:
                top:expression(document.getElementById
('myGrid').scrollTop-1);

To lock a column:
                left:expression(document.getElementById
('myGrid').scrollLeft);