ul#yaku2{
    list-style:none;
    margin:0;
    padding:0;
    width:100%;
}
ul#yaku2 li{
    list-style:none;
    float:left;
    width:89px;
}
ul#yaku2 a{
    display:block;
    width:89px;
    height:51px;
    background-image:url(home/img/yaku2_link.gif);
}
ul#yaku2 a span{
    display:none;
}

a.yaku2a{
    background-position:0px 0px;
}
a:hover.yaku2a{
    background-position:0px -51px;
}
a.yaku2b{
    background-position:-91px 0px;
}
a:hover.yaku2b{
    background-position:-91px -51px;
}