#ro-su{
    position: relative;
}

#ro-su a{
    position: absolute;
    top: -220px;
    left: 630px;
    background: url(http://img.blog.mochivation.com/20091005_455532.gif) no-repeat center left;
    cursor: pointer;
    width: 240px;
    height: 162px;
    outline-color: invert;
    outline-style: none;
    outline-width: medium;
    text-decoration: none;
    text-indent:-9999px;
}