Hi,
I want to remove both header and footer in download page only, but in (_download_page_timed.inc) there is only body content, any one please help me.
header and footer code is in templates\partial\_header.inc.php and templates\partial\_footer.inc.php so you can tweak them accordingly. Also these header and footer files are used on every page of your website so the best way may be to create a new header and footer file just for the download pages...
But you still need css and javascript files that get loaded from your header footer file for your downloads to work.