pop up "save dialog" box

Hi all, I have code below which save MYSQL to csv file. I am using ADODB library to do this. The saving MYSQL to csv file is ok . However i need to allow the the user to enter file name for csv file. Anybody have any ideas how to do this? Thanks $sql = $_SESSION['CSV_SQL']; $_logger = new Log4jLogger(); $_logger->logdebug('sql:', $sql); if (!isset($_REQUEST['maintainall'])) {

    $filename = 'tbl_chassis.csv';
    CSVUtil::UploadTbtoCSV($sql, $filename);
    unset($_SESSION['CSV_SQL']);
    header('Location: ../maintain.php?csv');
    exit;

} else {

    //$sql = 'SELECT * from tbl_card';

$filename = 'tbl_card.csv';

    CSVUtil::UploadTbtoCSV($sql, $filename);
    unset($_SESSION['CSV_SQL']);
    header('Location: ../maintainall.php?csv');
    exit;

} function UploadTbtoCSV($sqltext,$filename) {

        $_logger = new Log4jLogger();
        $_logger->logdebug("starting.. upload tb to csv");

        $rs = dbQuery($sqltext);
        $rs->MoveFirst();
        $_logger->logdebug("UploadTbtoCSV csvpath:",CSV_PATH);

        $fp = fopen(CSV_PATH."/".$filename, "w");

        if ($fp) {
            rs2csvfile($rs, $fp);
            fclose($fp);
            $_logger->logdebug("starting upload tb to csv done");
        }

}