Margins in CSS

1

I’m trying to set the body text margins using CSS, but they dont seem to work. This is what my CSS file looks like:

<!-- TD
{
color: white;
font-family: arial;
font-size: 10pt;
margin-left: 10px;
margin-right: 10px;
}

–>

TD
{
color: white;
font-family: arial;
font-size: 10pt;
margin-left: 10px;
margin-right: 10px;
}
:hr:

What am I doing wrong?