Es nez kaa tev tur iisti vajag, dizainiski un taa, bet tad tu vari <tabli> likt ieksh <div>, un div pieshkjirt bg un to bg nopozicioneet, like:
<div style="background:url(blume.gif) left bottom no-repeat">
<table>
..
</table>
</div>
..un tad tev buus tas div bg zem table, bet virs body bg.