Exactly what do you mean by "two page borders . . . top and bottom"?
If you mean one border line across the top of the page, and a different
border line across the bottom, it's fairly easy. Just go to the page border
window (its location varies depending on which version of Word you're using).
Select the border you want across the top of the page. It will show up on all
four sides of the little thumbnail sample page. Delete the sides and bottom,
so that border is only across the top. Then select the border you want across
the bottom, and click on the little icon for a bottom margin. That should do
it.
If you mean a border AROUND the top half of the page and a different border
around the bottom half of the page, you'll have to do it with paragraph
borders instead of a page border. Select the paragraphs on the top and apply
one border to them, and then select the paragraphs on the bottom and apply a
different border to them.
If this helps, please click the Yes button.
Thanks.