document.write('<style type="text/css"><!-- OL#quiz LI UL { display: none; } --></style>');	

var openDivs = [];
function toggleDiv ( id, level ) {
    var div = document.getElementById( id );
    if ( div.style.display == "block" )
        div.style.display = "none";
    else {
        if ( openDivs[level] ) openDivs[ level ].style.display = "none";
        openDivs[ level || 0 ] = div;
        div.style.display = "block";
    }
}