https://perko.com/layout/js/menu_fade.js

1$(function() {
2    $('.main_menu ul').find('ul').show().hide();
3    $('.main_menu > ul > li').hover(function() {
4        var $this = $(this);
5        $this.children('ul').fadeIn(0);
6    }, function() {
7        var $this = $(this);
8        $this.children('ul').fadeOut(0);
9    });
10});
11
12$(document).ready(function () {
13    $("ul.navi li").hover(function () {
14        $(this).children("ul.subleft").fadeIn(0);
15		$(this).children("ul.subfeature").fadeIn(0);
16		$(this).children("ul.subfeature2").fadeIn(0);
17		$(this).children("ul.subrightfeature").fadeIn(0);
18		$(this).children("ul.subleftfeature").fadeIn(0);
19    }, function () {
20        $(this).children("ul.subleft").fadeOut(0);
21		$(this).children("ul.subfeature").fadeOut(0);
22		$(this).children("ul.subfeature2").fadeOut(0);
23		$(this).children("ul.subrightfeature").fadeOut(0);
24		$(this).children("ul.subleftfeature").fadeOut(0);
25    });
26});
27
28$(document).ready(function () {
29    $("ul.navi li").hover(function () {
30        $(this).children("ul.subright").fadeIn(0);
31    }, function () {
32        $(this).children("ul.subright").fadeOut(0);
33    });
34});
35
36$(document).ready(function () {
37    $("ul.navi li").hover(function () {
38        $(this).children("ul.subleft_middle").fadeIn(0);
39    }, function () {
40        $(this).children("ul.subleft_middle").fadeOut(0);
41    });
42});
43
44$(document).ready(function () {
45    $("ul.navi li").hover(function () {
46        $(this).children("ul.subleft_bottom").fadeIn(0);
47    }, function () {
48        $(this).children("ul.subleft_bottom").fadeOut(0);
49    });
50});
51
52$(document).ready(function () {
53    $("ul.navi li").hover(function () {
54        $(this).children("ul.subleft_bottom_middle").fadeIn(100);
55    }, function () {
56        $(this).children("ul.subleft_bottom_middle").fadeOut(100);
57    });
58});
59
60$(document).ready(function () {
61    $("ul.navi li").hover(function () {
62        $(this).children("ul.subleft_tworows").fadeIn(100);
63    }, function () {
64        $(this).children("ul.subleft_tworows").fadeOut(100);
65    });
66});
67
68$(document).ready(function () {
69    $("ul.navi li").hover(function () {
70        $(this).children("ul.subright_bottom").fadeIn(100);
71    }, function () {
72        $(this).children("ul.subright_bottom").fadeOut(100);
73    });
74});
75
76$(document).ready(function () {
77    $("ul.navi li").hover(function () {
78        $(this).children("ul.subright_bottom_mar").fadeIn(100);
79    }, function () {
80        $(this).children("ul.subright_bottom_mar").fadeOut(100);
81    });
82});