Replace Blog Name with Image

Hi,
I created an image for my blog title, but can’t figure out how to alter the header so that the image shows, rather than the text.

I think this is the relevant portion of the css. Can anyone give me a hint here? There is a “headerimage” in the code, but it is commented out. How would I change this?

<?php include (TEMPLATEPATH . ‘/ads.php’); ?>

<div id=”header”>
<h1>/”><?php bloginfo(‘name’); ?></h1>
<div class=”todaysDate”><?php echo date (“l, F d, Y “);?></div>
<!–<div id=”headerimg”>
<h1>/”><?php bloginfo(‘name’); ?></h1>
<div class=”description”><?php bloginfo(‘description’); ?></div>
</div>–>
</div>