\Preamble{html}
\begin{document}
   \ConfigureEnv{titlepage}
       {\IgnorePar \EndP
        \HCode{<table><tr><td>}}
       {\EndP\IgnorePar\HCode{</td>}}
       {}{}
   \ConfigureEnv{enumerate}
       {\IgnorePar \HCode{<td>}}
       {\EndP \IgnorePar
        \HCode{</td></tr></table>}}
       {}{}
   \Css{td {border: 1px solid black;}}
\EndPreamble