div.dropdown {
    z-index:999;
    cursor:default;
    margin:0;
    padding:0;
    border:1px solid black;
    border-style:outset;
    background-color:whitesmoke;
}

div.dropdown .dropdown-content {
    max-height:200px;
    overflow-x:hidden;
    overflow-y:auto;
}

div.dropdown .dropdown-content ul.dropdown {
    list-style-position:outside;
    list-style:none;
    margin:0;
    padding:0;
}

div.dropdown .dropdown-content li.dropdown {
    margin:2px 0;
    padding:0 3px;
    white-space:nowrap;
}

div.dropdown .dropdown-content li.selected {
    background-color:lightblue;
}