Change Logo from Text to Image

[Pochon]

How can I change this code to change the store name to display a logo image instead of the stores name in text?

    <div id="logoWrapper">
        <div id="logo"><?php echo '<a href="' . HTTP_SERVER . DIR_WS_CATALOG . '">' . STORE_NAME . '</a>' ?></div>
<?php
    if (HEADER_SALES_TEXT != '' || (SHOW_BANNERS_GROUP_SET2 != '' && $banner = zen_banner_exists('dynamic', SHOW_BANNERS_GROUP_SET2))) {
        if (HEADER_SALES_TEXT != '') {
?>
        <div id="taglineWrapper"><?php echo HEADER_SALES_TEXT; ?></div>

I want to instead of having the stores name in text, to have a logo image I have.