/*-  Collapses left sidebar nav inactive parent items for enhanced
     usability on larger sites.
----------------------------------------------------------------------*/

#sidebar-nav .children, #sidebar-nav ul ul {
    display: none;
    list-style-type: none; 
}

#sidebar-nav .current_page_item .children,
#sidebar-nav .current_page_parent .children,
#sidebar-nav .current_page_ancestor .children,
#sidebar-nav .current_page_parent ul
{
    display: block;
}