Remember you need to add the $name variable to the themeheader function's global line:
i.e. function themeheader() {
global $user, $banners, $sitename, $slogan, $cookie, $prefix, $dbi;

should be changed to:
function themeheader() {
global $user, $banners, $sitename, $slogan, $cookie, $prefix, $name, $dbi;