var last;
function expandingMenu(num) {
    var speed = 350;
    var item_title = $("#menu ul").eq(num).children(":first");
    var items = $("#menu ul").eq(num).children().filter(function (index) { return index > 0; });
    /* hide items if not active */
    if (items.is(".active") == false) {
        items.hide();
    }
    /* add click functions + pointer to title */
    item_title.css({cursor:"pointer"}).click(
        function () {
            items.slideDown(speed);
            if (last != undefined && last != items) {
                last.slideUp(speed);
            }
            last = items;
        }
    )
}