Minor - adding documenation to Display::display_sortable_table function

main/inc/lib/display.lib.php

@@ -270,6 +270,7 @@ class Display {
 	 * 					'per_page' = number of items to show per page
 	 * 					'page_nr' = The page to display
 	 * @param array $query_vars Additional variables to add in the query-string
+	 * @param string The style that the table will show. You can set 'table' or 'grid' string  
 	 * @author bart.mollet@hogent.be
 	 */
 	public static function display_sortable_table ($header, $content, $sorting_options = array (), $paging_options = array (), $query_vars = null, $form_actions=array(),$style='table') {