In wordpress there is a plugin that assigns a header graphic for each page. You call that header graphic by placing this code in your header.php file:

```
<?php if(function_exists('show_media_header')){ show_media_header();} ?>

```

This basically calls the image assigned and places it as an IMG in HTML.
I would like to have it called as a background image with CSS but don't know how. For example:

```
.header-graphic{ background:url("show_media_header();"); }

```

I know that will obviously not work but that should explain what I'm trying to do. 

Any help would be great.
Thanks!