theme_add_style($path = '', $media = 'all')
drupal/includes/theme.inc, line 330
Add a theme stylesheet to be included later. This is handled separately from drupal_set_html_head() to enforce the correct CSS cascading order.
function theme_add_style($path = '', $media = 'all') {
static $styles = array();
if ($path && !isset($styles["$media:$path"])) {
$style = new stdClass();
$style->path = base_path() . $path;
$style->media = $media;
$styles["$media:$path"] = $style;
}
return $styles;
}