Designing 3D buttons with pure CSS

Interesting article on how to create 3D buttons with using only CSS.

 div#buttonA {
    margin-left: 50px;
}
div#buttonA ul {
    margin: 0px;
    padding: 0px;
    font-family: Verdana, Arial, Helvetica, sans-serif;
    font-size: 12px;
    line-height: 30px;
}
div#buttonA li {
    list-style-type: none;
    height: 30px;
    width: 125px;
    margin: 10px;
    text-align:center;
}
div#buttonA li a {
    text-decoration: none;
    height: 100%;
    width: 100%;
    display: block;
    background-color: #999999;
    border-style: solid;
    border-bottom-color: #333333;
    border-right-color: #555555;
    border-left-color: #BBBBBB;
    border-top-color: #DDDDDD;
}
div#buttonA li a:link {
    color: #000000;
    font-weight: bold;
    background-color: #999999;
    border-style: solid;
    border-bottom-color: #333333;
    border-right-color: #555555;
    border-left-color: #BBBBBB;
    border-top-color: #DDDDDD;
}
div#buttonA li a:visited {
    color: #000000;
    font-weight: normal;
    background-color: #999999;
    border-style: solid;
    border-bottom-color: #333333;
    border-right-color: #555555;
    border-left-color: #BBBBBB;
    border-top-color: #DDDDDD;
}
div#buttonA li a:hover {
    font-weight: bold;
    color: #FFFFFF;
    background-color: #777777;
    border-style: solid;
    border-bottom-color: #333333;
    border-right-color: #555555;
    border-left-color: #BBBBBB;
    border-top-color: #DDDDDD;
}
div#buttonA li a:active {
    font-weight: bold;
    color: #FFFFFF;
    background-color: #666666;
    border-style: solid;
    border-top-color: #333333;
    border-left-color: #555555;
    border-right-color: #BBBBBB;
    border-bottom-color: #DDDDDD;
}