.clear { /* generic container (i.e. div) for floating buttons */
    overflow: hidden;
    width: 100%;
}

a.button {
    background: transparent url('../images/btn_css2.png') no-repeat scroll top right;
    color: #fff;
    display: block;
    float: left;
    height: 21px;
    margin-right: 6px;
    padding-right: 13px; /* sliding doors padding */
    text-decoration: none;
}

a.button span {
    background: transparent url('../images/btn_css1.png') no-repeat;
    display: block;
    line-height: 15px;
    padding: 3px 0 3px 18px;
} 

a.button:active {
    background-position: bottom right;
    color: #fff;
    outline: none; /* hide dotted outline in Firefox */
}

a.button:active span {
    background-position: bottom left;
    padding: 3px 0 3px 18px; /* push text down 1px */
}