$pattern_id = getPatternId();
if (!preg_match('/order_id=/i', $where)) {
    if (isset($GLOBALS['return_from'])) {
        if ($GLOBALS['return_from'] == 'ord_order_header_p(popup1)') {
            // nothing selected from popup screen, so exit now
            scriptPrevious($GLOBALS['errors']);
        } // if
    } // if
    if (preg_match('/popup2/i', $pattern_id)) {
        // order_id has not been supplied yet, so get it now via a popup
        scriptNext('ord_order_header_p(popup1)', $where);
    } // if
} // if