ul.marquee {
    /* required styles */
    display: block;
    padding: 0;
    margin: 0;
    list-style: none;
    position: relative;
    overflow: hidden;
    height: 21px;
}

    ul.marquee li {
        /* required styles */
        position: absolute;
        font-size:13px;
        top: -999em;
        left: 0;
        padding-top: 2px;
        display: block;
        white-space: nowrap; /* keep all text on a single line */
        height: 21px;
    }