html .fb_share_link { 
    padding:2px 0 0 20px; 
    height:16px; 
    background:url(http://b.static.ak.fbcdn.net/images/share/facebook_share_icon.gif?7:26981) no-repeat top left; 
    font-family:"lucida grande",tahoma,verdana,arial,sans-serif;
    font-size:11px;
}

.buttonFacebook a {
    display: block;
    width: 133px;
    height: 15px;
    background: url('../carbon/images/facebook.gif') no-repeat;
}
.buttonFacebook a:hover { background-position: -133px 0; }