fieldset.River {
    min-width:80px;
    max-width:160px;
    min-height:160px;
    overflow:auto;
    float:left;
}
fieldset.River>div.output {
    padding:0;
}
fieldset.River>div.output div.item {
    padding-left:6px;
}
fieldset.River>div.output div.item:hover {
    cursor:pointer;
    background-color:red;
    border:ridge 2px yellow;
}
fieldset.River>div.output div.item.select {
    background-color:red;
    border:ridge 2px yellow;
}
fieldset.River>div.output div.sublist {
    margin-left:20px;
}
fieldset.River>div.output div.subitem {
}
fieldset.River>div.output div.subitem:hover {
    cursor:pointer;
    background-color:red;
    border:ridge 2px yellow;
}
fieldset.River>div.output div.subitem.select {
    background-color:red;
    border:ridge 2px yellow;
}