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本文实例讲述了jquery实现仿京东2级菜单效果。分享给大家供大家参考。具体如下：
这里介绍js实现仿京东2级菜单效果代码，带有延时功能，操作上更加舒适自然。
先来看看运行效果截图：
在线演示地址如下：
http://demo.jb51.net/js/2015/jquery-fjd-style-menu-codes/
具体代码如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>仿京东网站的2级菜单导航</title>
<style type="text/css">
ul{margin:0;padding:0;list-style-type:none;}
a{ text-decoration:none;}
.mold_open_hover,.mold_open{background-image:url();background-repeat:none;display:inline-block;width:10px;height:6px;margin-left:10px;position:relative;top:-2px;}
.mold_open{background-position:0 -6px;}
.mold_open_hover{background-position:0 0;}
.mod-menu{position:relative;z-index:1000;left:-1px;margin-left:100px;}
h1{margin-left:100px;}
.menu-cont-list a:hover{text-decoration:underline;}
.mod-menu .menu-item{width:220px;border-top:solid 1px #d59bb2;border-bottom:solid 2px #d59bb2;position:relative;z-index:22;}
.mod-menu .menu-item li{height:47px;line-height:47px;background:#feebf3;border-top:solid 1px #f0bfd3;}
.mod-menu .menu-item li.mouse-bg{background:url() no-repeat #fff;position:relative;z-index:22;margin-right:-4px;}
.mod-menu .menu-item a{color:#c81d61;font-size:16px;padding-left:33px;display:block;height:45px;border-top:solid 1px #f1f2f7;}
.mod-menu .menu-item a:hover{ text-decoration:none;}
.mod-menu .menu-cont{position:absolute;left:220px;top:1px;background:#fff;width:573px;border:solid 1px #F0BFD3;box-shadow:2px 0 10px rgba(210,33,103,0.25);z-index:20;}
.mod-menu .menu-cont-list{padding:0 30px;}
.mod-menu .menu-cont-list li{border-bottom:dotted 1px #f0bfd3;padding:10px 0;}
.mod-menu .menu-cont-list li:last-child{border-bottom:none;}
.mod-menu .menu-cont-list h3{font-size:14px;font-weight:700;}
.mod-menu .menu-cont-list h3 a{color:#222;}
.mod-menu .menu-list-link a{color:#666;line-height:24px;}
.mod-menu .menu-list-link .long-string{color:#ccc;font-size:12px;padding:0 10px;}
</style>
<script src="jquery-1.6.2.min.js" type="text/javascript"></script>
<script type="text/javascript">
var l;
var t;
var menuItem;
$(document).ready(menu_init);
function menu_init()
{
var mod_menu=$(".mod-menu");//导航模块区
menu();//执行展开二级菜单函
//setTimeout(menu(),1000)
}
var menu=function()
{
menuItem=$(".menu-item li");//选择导航列表
menuItem.each(menu_each);/*导航菜单菜单*/
menuItem.mouseleave(menu1_leave);/*导航菜单菜单*/
$(".mod-menu").mouseleave(menu2_mouse_leave);
}//展开二级菜单
var menu_each=function()
{
var _index=$(this).index();//获取当前选择菜单列表的索引
$(this).mouseenter(menu_mouse_enter);
}
var menu_mouse_enter=function()
{
l = $(this);//获取当前鼠标滑过的列表的顶部坐标
t=setTimeout("menu_mouse_enter_show()", 300)
}
function menu_mouse_enter_show()
{
// alert(y1);
var y = l.position().top+1;//获取当前鼠标滑过的列表的顶部坐标
$(".menu-cont").show();
$(".menu-cont").css("top",y);//需要显示的对应索引内容
l.addClass("mouse-bg").siblings().removeClass("mouse-bg");
$(".menu-cont>div").eq(_index).show().siblings().hide();
}
var menu1_leave=function()
{
clearTimeout(t);
}
var menu2_mouse_leave=function()
{
$(".menu-cont").hide();
menuItem.removeClass("mouse-bg");
}
</script>
</head>
<body>
<h1>简单的2级菜单导航</h1>
<div class="mod-menu f-l">
<div id="column-left">
<ul class="menu-item">
<li class=""><a href="#">Wedding</a></li>
<li class=""><a href="#">Women's Shoes</a></li>
<li class=""><a href="#">Accessories</a></li>
<li class=""><a href="#">Beauty & Health</a></li>
</ul><!--一级菜单列表-->
<div class="menu-cont hide" style="display: none; top: 241px;">
<div class="menu-cont-list" style="display: none;">
<ul>
<li>
<h3><a href="#">Wedding Dresses</a></h3>
<div class="menu-list-link"></div>
</li>
<li>
<h3><a href="#">Bridesmaid Dresses</a></h3>
<div class="menu-list-link"></div>
</li>
<li>
<h3><a href="#">Wedding Party Dresses</a></h3>
<div class="menu-list-link">
<a title="" href="#">Mother of the Brides Dresses</a>
<span class="long-string">|</span>
<a title="" href="#">Flower Girl Dresses</a>
<span class="long-string">|</span>
<a title="" href="#">Wedding Guest Dresses</a>
</div>
</li>
<li>
<h3><a href="#">Wedding Accessories</a></h3>
<div class="menu-list-link">
<a title="" #">Fabric Swatch</a>
<span class="long-string">|</span>
<a title="" href="#">Bridal Lingerie</a>
<span class="long-string">|</span>
<a title="" href="#">Wedding Flowers</a>
<span class="long-string">|</span>
<a title="" href="#">Wedding Petticoats</a>
</div>
</li>
</ul>
</div>
<div class="menu-cont-list" style="display: none;">
<ul>
<li>
<h3><a href="#">Prom Dresses</a></h3>
<div class="menu-list-link">
</div>
</li>
<li>
<h3><a href="#">Military Ball Dresses</a></h3>
<div class="menu-list-link">
</div>
</li>
<li>
<h3><a href="#">Evening Dresses</a></h3>
<div class="menu-list-link">
</div>
</li>
<li>
<h3><a href="#">Cocktail Dresses</a></h3>
<div class="menu-list-link">
</div>
</li>
<li>
<h3><a href="#">Ball Gowns</a></h3>
<div class="menu-list-link">
</div>
</li>
<li>
<h3><a href="#">Homecoming Dresses</a></h3>
<div class="menu-list-link">
</div>
</li>
<li>
<h3><a href="#">Little Black Dresses </a></h3>
<div class="menu-list-link">
</div>
</li>
<li>
<h3><a href="#">Quinceanera Dresses</a></h3>
<div class="menu-list-link">
</div>
</li>
</ul>
</div>
<div class="menu-cont-list" style="display: none;">
<ul>
<li>
<h3><a href="#">Dresses</a></h3>
<div class="menu-list-link">
</div>
</li>
<li>
<h3><a href="#">Clubwear</a></h3>
<div class="menu-list-link">
</div>
</li>
<li>
<h3><a href="#">Leggings</a></h3>
<div class="menu-list-link">
</div>
</li>
<li>
<h3><a href="#">Lingeries</a></h3>
<div class="menu-list-link">
<a title="" #">Bras</a>
<span class="long-string">|</span>
<a title="" href="#">Babydolls</a>
<span class="long-string">|</span>
<a title="" href="#