A list of html doctypes, beware of the utf encoding on the last two, they throw ie in quirky mode…

html 4 strict. < !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">

</code>

html 4.1 strict. < !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">

</code>

xhtml 1.0 transitional. < ?xml version="1.0" encoding="UTF-8"?> < !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

</code> xhtml 1.0 strict. < ?xml version="1.0" encoding="UTF-8"?> < !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

</code>