static function is_html5()
 {
     if (self::$is_html5 == null) {
         self::$is_html5 = function_exists('current_theme_supports') && current_theme_supports('html5');
     }
     return self::$is_html5;
 }
 function get_meta_form_data($metakey, $prefix, $values)
 {
     $content = array();
     if (($post_id = Slickr_Flickr_Utils::get_post_id()) && ($meta = Slickr_Flickr_Utils::get_meta($post_id, $metakey))) {
         $values = Slickr_Flickr_Options::validate_options($values, $meta);
     }
     foreach ($values as $key => $val) {
         $content[$key] = array();
         $content[$key]['value'] = $val;
         $content[$key]['id'] = $prefix . $key;
         $content[$key]['name'] = $metakey . '[' . $key . ']';
     }
     return $content;
 }