HTML P and FIELDSET

I have FIELDSET inside of P. If I set P style to hidden, FIELDSET is still shown.

Layout sample

This is a paragraph.

Group

ONE
TWO

Code

<P style="display:none; visibility:hidden;">
This is a paragraph.
<FIELDSET>
<LEGEND>Group</LEGEND>
ONE<BR>TWO
</FIELDSET>
</P>

The only solution I have is to use DIV instead of P.