I uploaded footer.php to the directory of the {TEMPLATEURL} of limesurvey, then added the following code to the config.php.
$embedded = true;
$embedded_inc = "{TEMPLATEURL}"; // path to the header to include if any
$embedded_headerfunc = ""; // e.g. COM_siteHeader for geeklog
$embedded_footerfunc = "footer.php"; // e.g. COM_siteFooter for geeklog
But I did't see any change the survey, that is I didn't see the footer. Is there anything wrong? What should I do with it? many many thanks.