#scroll {
    position: fixed;
    right: 10px;
    bottom: 10px;
    cursor: pointer;
    width: 50px;
    height: 50px;
    background-color: #3498db;
    background-color: #7b8a98;
    text-indent: -9999px;
    display: none;
    -webkit-border-radius: 60px;
    -moz-border-radius: 60px;
    border-radius: 60px;
    z-index: 99;
}
#scroll span {
    position:absolute;
    top:50%;
    left:50%;
    margin-left:-8px;
    margin-top:-12px;
    height:0;
    width:0;
    border:8px solid transparent;
    border-bottom-color:#ffffff;
}
    #scroll:hover {
        background-color: #005489;
        background: #4e5f6f;
        opacity: 1;
        filter: "alpha(opacity=100)";
        -ms-filter: "alpha(opacity=100)";
    }