CSS3 :: border-radius property

This style is currently supported by Netscape & Mozilla using the
-moz-border-radius property; other browsers will ignore the style.

-moz-border-radius-topleft: 30px;
-moz-border-radius-topright: 30px;
-moz-border-radius-bottomleft: 30px;
-moz-border-radius-bottomright: 30px;