\input TeX4ht.sty
 \Preamble{html,HTable}
 \EndPreamble
 
 \tt
 \HTable B{
   [<] LEFT & [-C2] CENTER&
              [>] RIGHT &
              ~\BR~\BR~\cr
   [^] TOP  & [|] MIDDLE&
              [_] BOTTOM&
              [=] BASELINE &
              ~\BR~\BR~\cr
 ~~~~~~~~~~~~~~~~}
 
 \bye