Are the small areas in the bottom left supposed to be separate elements?
I would do something like:
Code:
<div id="top_pane">
<div id="top_left"></div>
<div id="top_right"></div>
</div>
<div id="bottom_pane">
<div id="bottom_left"></div>
<div id="bottom_right"></div>
</div>
Then CSS:
Code:
div#top_pane div#top_left {
display: inline;
float: left;
width: /*WIDTH ENTERED HERE*/
}
div#top_pane div#top_right {
display: inline;
float: left;
width: /*WIDTH ENTERED HERE*/
}
and the same for the bottom.
You could float the div top_right to the right if desired.
Hope this helps to get you started.
D.