Sorry should have said – I am using TwentyTen theme
I decided having a flash image on every page could be distracting. I just have a swf on the Home page. The swf is 940×300 as I am displaying a 360degree photo panorama and it needed to be larger to show the detail. The size was a compromise; the swf file download is only about 300kb. The static header on other pages is the standard 940×198.
The code I have in header.php in the child theme directory to display the flash file (and a greyscale bar so users can adjust their displays) just on the Home page in given below. It would be easy to modify to put a flash file on every page.
/// Check if this is a post or page, if it has a thumbnail, and if it's a big one
if ( is_singular() &&
has_post_thumbnail( $post->ID ) &&
( /* $src, $width, $height */ $image = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'post-thumbnail' ) ) &&
$image[1] >= HEADER_IMAGE_WIDTH ) :
// Houston, we have a new header image!
echo get_the_post_thumbnail( $post->ID, 'post-thumbnail' );
elseif ( is_home() ): ?>
<div id="hm_swf">
<embed src="http://www.mywebsite/myblog/wp-content/uploads/header-940x300.swf" quality="high" bgcolor="#ffffff" width="940" height="300" name="banner" align="middle" allowScriptAccess="sameDomain" allowFullScreen="false" type="application/x-shockwave-flash" pluginspage="http://www.adobe.com/go/getflashplayer" />
<img src="http:///www.mywebsite/myblog/wp-content/uploads/greyscalebar.gif" width=940" height="15" align="middle">
</div>
<?php else : ?>
<img src="<?php header_image(); ?>" width="<?php echo HEADER_IMAGE_WIDTH; ?>" height="<?php echo HEADER_IMAGE_HEIGHT; ?>" alt="" />
<?php endif; ?>
