5. • 3.3.2のTwentyElevenで使用している処理
// Turn on random header image rotation by default.
add_theme_support( 'custom-header', array( 'random-default' => true ) );
// Add a way for the custom header to be styled in the admin panel that controls
// custom headers. See twentyeleven_admin_header_style(), below.
add_custom_image_header( 'twentyeleven_header_style', 'twentyeleven_admin_header_style', 'twentye
leven_admin_header_image' );