$(function(){
    var $Menu = $('#Menu');
    var $Menu_items = $Menu.children('li');
    
    $Menu_items.bind('mouseenter', function(){
        var $this = $(this);
        $this.addClass('slided selected');
        $this.children('div').css('z-index', '9999').stop(true, true).slideDown(200, function(){
            $Menu_items.not('.slided').children('div').hide();
            $this.removeClass('slided');
        });
    }).bind('mouseleave', function(){
        var $this = $(this);
        $this.removeClass('selected').children('div').css('z-index', '1');
    });
    
    $Menu.bind('mouseenter', function(){
        var $this = $(this);
        $this.addClass('hovered');
    }).bind('mouseleave', function(){
        var $this = $(this);
        $this.removeClass('hovered');
        $Menu_items.children('div').hide();
    })
});