Hi,
everything outside your "root el" (i.e. body) is rendered by typo3
itself.
To change the doctype add:
config {
doctype = <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0
Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
}
or similar to your TS setup
Cheers,
Nikolas