a.black-btn {
    background: transparent url('/SiteCollectionImages/misc/re.png') no-repeat;
    background-position: top right;
    display: block;
    float: left;
    font: 16px;
    height: 26px;
    margin-right: 6px;
    color: #dcdcdc;
    text-decoration: none;
    font-weight: bold;
    padding-right: 16px;

}

a.black-btn span {
    background: transparent url('/SiteCollectionImages/misc/le.png') no-repeat;
    display: block;
    line-height: 15px;
    color: #dcdcdc;
    text-decoration: none;
    font-weight: bold;
    padding: 5px 0 6px 16px;

} 

a.black-btn:hover {
    background-position: bottom right;
    color: #FFFFFF;
    text-decoration: none;
}

a.black-btn:hover span {
    background-position: bottom left;
    color: #FFFFFF;
    text-decoration: none;
}