.AspNet-TreeView-Root
{
}
.AspNet-TreeView-Root li
{
    margin-left: 2em;
}
.AspNet-TreeView-Expand, .AspNet-TreeView-Collapse
{
    display: block;
    background: url(images/tree-view/tree-expand.png) 0px 0.2em; 
    float: left;
    width: 1.2em; 
    height: 1.5em;
    cursor: pointer;
}
.AspNet-TreeView-Collapse
{
    background: url(images/tree-view/tree-collapse.png) 0px 0.2em;
}

.AspNet-TreeView a img
{
    border: 0px;
}

.AspNet-TreeView-Selected a
{
    font-weight: bold;
}
.AspNet-TreeView-Selected ul a
{
    font-weight: normal;
}

.AspNet-TreeView-Parent a
{
    font-weight: bold !important;
}

.AspNet-TreeView-Parent ul .AspNet-TreeView-Leaf a
{
    font-weight: normal !important;
}