.treeview, .treeview ul { 
    padding: 0;
    margin: 0;
    list-style: none;
}	

.treeview li { 
    position: relative;
    margin: 0;
    padding: 0 0 0 20px;
    z-index: 10;
}

.treeview li {
    background-repeat: no-repeat;
    background-position: 0 7px;
}

.treeview li { background: url(../images/tv-item.gif) 0 0 no-repeat; }
.treeview .collapsable { background-image: url(../images/tv-collapsable.gif); }
.treeview .expandable { background-image: url(../images/tv-expandable.gif); }
.treeview .last { background-image: url(../images/tv-item-last.gif); }
.treeview .lastCollapsable { background-image: url(../images/tv-collapsable-last.gif); }
.treeview .lastExpandable { background-image: url(../images/tv-expandable-last.gif); }

.treeview .hitarea {
    width: 20px;
    height: 20px;
    position: absolute;
    left: 10px;
    cursor: "pointer";
    z-index: 9999;
}