Home page random image (How to)

I have a static home page, and wanted to place a random image on it. Using PHP Code as my import format, I added the following code to my page to do just this.

$images = image_get_random();
$image=$images[0];
$img_size=IMAGE_PREVIEW;
    $info = image_get_info(file_create_path($image->images[$img_size]));
    $output = '<div style="width: '. $info['width'] .'px" class="image-attach-body">';
    $output .= l(image_display($image, $img_size), "node/$node->iid", array(), NULL, NULL, FALSE, TRUE);
    $output .= '</div>'."\n";

echo $output;

The second line onwards are mainly from the function theme_image_attach_body($node) in the image_attach.module (in /image/contrib/image_attach), and, I suspect there is a way to replace these lines with a call to the function, but I couldn't figure it out.

To output the image body text as the caption, use the following (detailed here):

$images = image_get_random();
$image=$images[0];
$img_size=IMAGE_PREVIEW;
    $info = image_get_info(file_create_path($image->images[$img_size]));
    $caption = node_teaser($image->body);

    $output = '<div style="border-bottom:1px solid #999999;margin-left:30px; float:right;width: '. $info['width'] .'px" class="image-attach-body">';
    $output .= l(image_display($image, $img_size), "node/$node->iid", array(), NULL, NULL, FALSE, TRUE);
    $output .= '<div class="caption">' . $caption . '</div>';
    $output .= '</div>'."\n";
echo $output;