The whole document scrolls when you don't have freeze panes or splits turned on. To freeze the top part of a spreadsheet in Excel 2003, select the last row you want to move, click the number next to it on the left and click Window and Freeze Pane. Rows 1 - 12 won't move while the rest scroll in any direction. To unfreeze the pane, click Window and Unfreeze Panes.
To freeze the content on the left, select the last column you want to move, click the letter on top of it and click Window and Freeze Pane. The next image shows the selection of column B. Column A, the headers column, won't move while the rest scroll in any direction. To unfreeze the pane, click Window and Unfreeze Panes.