include_once($path_to_root . "/purchasing/includes/po_class.inc");
include_once($path_to_root . "/includes/session.inc");
include_once($path_to_root . "/purchasing/includes/purchasing_ui.inc");
include_once($path_to_root . "/purchasing/includes/po_class.inc");
include_once($path_to_root . "/includes/session.inc");
include_once($path_to_root . "/purchasing/includes/purchasing_ui.inc");