.jssora21l, .jssora21r, .jssora21ldn, .jssora21rdn
    {
        position: absolute;
        cursor: pointer;
        display: block;
        background: url(a21.png) center center no-repeat;
        overflow: hidden;
    }
    .jssora21l { background-position: -3px -33px; }
    .jssora21r { background-position: -63px -33px; }
    .jssora21l:hover { background-position: -123px -33px; }
    .jssora21r:hover { background-position: -183px -33px; }
    .jssora21ldn { background-position: -243px -33px; }
    .jssora21rdn { background-position: -303px -33px; }

    .jssorb21 div, .jssorb21 div:hover, .jssorb21 .av
    {
        background: url(b21.png) no-repeat;
        overflow:hidden;
        cursor: pointer;
    }
    .jssorb21 div { background-position: -5px -5px; }
    .jssorb21 div:hover, .jssorb21 .av:hover { background-position: -35px -5px; }
    .jssorb21 .av { background-position: -65px -5px; }
    .jssorb21 .dn, .jssorb21 .dn:hover { background-position: -95px -5px; }