sorry for asking too soon

i was a little in a hurry i thought ... but then i tried a bit and it was really easy
i have 1 problem now though ... i will explain my page first
the table covers the whole page and is divided as follows
Code:
_______________
| |
|_____________|
| | |
|______|______|
| |
|_____________|
in the top row there will be 1 picture centered
in the 2nd row there will be 1 picture in each cell
in the 3rd (bottom) row there will be 3 or 4 smaller pictures, i think i will keep them in 1 cell
the table is showing fine .. using colspan=2 for the first and third row
but! in the second row i want to show 2 pictures which are rather large .... how can i make sure that the pictures are exactly 1 cell (50% of the screenwidth) ? (i want to use % because the page can be viewed on different resolutions (for sure on 800x600 and 1152x864)
so the table is showing nice .. i can make the pictures look perfect on my machine (1152x864) but on my other computer the pictures in the second row make a scrollbar appear on the bottom of the page .. i dont like scrollbars
