No. You can't do it like that.
Code:
<div class="left"></div>
<div class="top"></div>
<div class="mid">content</div>
<div class="right"></div>
<div class="bot"></div>
And in CSS set all of them to float left, and set the background images as the images you want around the outside, in bot, left, right and top. Mid for the middle etc.
With tables, just add another 2 rows, and 2 columns. In the top left corner, add the rounded edge, the same for all of the other corners, and you get the picture for the top/bottom and left/right.