Netscape 7.1 ignores CSS

[No_Name]

I created a very simple CSS for printing. It works fine in IE and Firefox but not Netscape or Mozilla by because it ignores the margin and font size. It also prints the header/footer (URL, page, etc) - I'm not sure if that part has to be changed by each individual in the browser options or if it can be controlled by CSS. I just would like to know why it works fine in IE and Firefox but not Mozilla 1.6 & Netscape 7.1

Link to CSS
<link type="text/css" rel="stylesheet" href="../styles/print_friendly.css" media="print" />

CSS
body
{
font-family: Arial, Helvetica, sans-serif;
font-size: 10pt;
background-color: White;
color: #000;
margin: 0;
padding: 0;
border: 0;
float: none;
}

td, th
{
font-family: Arial, Helvetica, sans-serif;
font-size: 10pt;

}
h1
{
line-height: 100%;
font-family: Arial, Helvetica, sans-serif;
font-size: 120%;
font-weight: bold;

}