function Menu(){
    var childnodes;
    try {
        childnodes = $('mainnav').immediateDescendants();
    }
    catch (e) {
        //alert(childnodes);
        //alert(e);
    }

    for (var i = 0; i < childnodes.length; i++) {
        var a = childnodes[i].firstDescendant();
        var ul = a.next();

        if (ul != null) {
            ul.onmouseover = function() { HighLight(this) };
            ul.onmouseout = function() { RemoveHighLight(this) };
        }
    }
}

function HighLight(ul){
    try{
        var a = $(ul).previous();
        var li = $(a).up();

        li.style.backgroundColor = "#ffffff";
    }
    catch (e) {
        //alert(e);
    }
}

function RemoveHighLight(ul){
    try{
        var a = $(ul).previous();
        var li = $(a).up();

        li.style.backgroundColor = "transparent";
    }
    catch (e) {
        //alert(e);
    }
}