entry header and left module help, i wanna put a pic as the background Options

[eveO]

i want to put a pic in the background of the entry header and the left module header can any one help me???

[lovescream]

Date;

CODE

<style type="text/css">div.blogheader, .caption {
background-image: url();}</div>

Modules;

CODE

<style type="text/css">table.left th {
 background-image: url();</style>