a#circle { -webkit-border-radius-bottomleft: 10px; -webkit-border-radius-topleft: 10px; -moz-border-radius-bottomleft: 10px; -moz-border-radius-topleft: 10px; -webkit-border-radius-topright: 10px; -webkit-border-radius-bottomright: 10px; -moz-border-radius-topright: 10px; -moz-border-radius-bottomright: 10px; background-color: red; display: block; height: 10px; width: 10px; position: absolute; top: 10; left: 10; }

a#circle:hover { -webkit-border-radius-bottomleft: 10px; -webkit-border-radius-topleft: 10px; -moz-border-radius-bottomleft: 10px; -moz-border-radius-topleft: 10px; -webkit-border-radius-topright: 10px; -webkit-border-radius-bottomright: 10px; -moz-border-radius-topright: 10px; -moz-border-radius-bottomright: 10px; background-color: blue; display: block; height: 10px; width: 10px; position: absolute; top: 10; left: 10; width: 100; }