.list_bookers_header {
    list-style: none;
}
.list_bookers_header li {
    float: left;
    width: 1.2ex;
    text-align: center;
    margin: 1em 0.5ex;
    border-bottom: solid 1px #229;
}

.list_bookers_body {
    list-style: none;
    clear: both;
    overflow-y: auto;

    min-height: 15em;
    max-height: 15em;
}
.list_bookers_body li {
    cursor: pointer;
    margin: 0.5em 0;
}
.list_bookers_body li:hover {
    font-weight: bold;
}
.list_bookers_body li.selected {
    font-weight: bold;
    color: #22D;
}