ul {
    padding-left: 0;
}
li {
    list-style: none;
}
.hoverbox {
    display:none;
    position:fixed;
    top:0;
    height:100%;
    padding-right: 20px;
    overflow-x: hidden;
    overflow-y: auto;
}

.hoverbox img {
    margin-left:2px;
}

a:hover .hoverbox {
    display:inline-block;
}