#yukari {
    position: fixed;
    width:45px;
    height:45px;
    bottom: 10px;
    right: 10px;
    color: #fff;
    border: 1px solid #CCC;
    display: none;
    cursor: pointer;
    background:url(yukari-cik-ikon.png) center center no-repeat;
    background-color: #FFF;
}
#yukari:hover {
    background-color: #666;
}