jquery顶部固定导航二级下拉菜单代码

使用方法：

1、head引入css文件

<link rel="stylesheet" href="css/style.css">

2、head引入js文件

<script src="js/jquery-1.7.2.min.js"></script>

3、body引入HTML代码

<div class="mod-topbar">
	<div class="layout-wrap">
		<div class="login">
			<a href="#" rel="nofollow" title="登录" class="plr5">登录</a>
			<span>●</span>
			<a href="#" rel="nofollow" title="免费注册" class="plr5">免费注册</a>
			应用公园,立即拥有您自己的手机APP应用！
		</div>
	</div>
</div>

<div class="mod-header">
	<div class="layout-wrap">
		<h1 class="logo">
			<a href="#" title="">
				<img class="logo-img" src="images/logo001.png">
				<img class="logo-txt" src="images/logo002.png">
			</a>
		</h1>
		<ul class="nav">
			<li class="active">
				<a href="#" title="" class="nav_btn">首页</a>
			</li>
			<li>
				<a href="#" title="" class="nav_btn">案例</a>
			</li>
			<li>
				<a href="#" title="" class="nav_btn">模板</a>
			</li>
			<li>
				<a href="#" title="" class="nav_btn">功能&价格</a>
			</li>
			<li class="new">
				<a href="#" title="" class="nav_btn">代理招商</a>
			</li>
			<li class="has-sub more">
				<a href="javascript:;" title="">
					服务支持 <span class="trigger ui-arb"></span>
				</a>
				<ul class="sub-nav" style="display: none; top: 104px; opacity: 0;">
					<li>
						<a href="#" class="s_btn">服务支持</a>
					</li>
					<li>
						<a href="#" class="s_btn">使用教程</a>
					</li>
					<li>
						<a href="#" class="s_btn">常见问题</a>
					</li>
					<li>
						<a href="#" class="s_btn">应用助手</a>
					</li>
				</ul>
			</li>
			<li class="has-sub">
				<a href="javascript:;">
					公告&资讯 <span class="trigger ui-arb"></span>
				</a>
				<ul class="sub-nav" style="top: 104px; opacity: 0; display: none;">
					<li>
						<a href="#" class="s_btn">最新公告</a>
					</li>
					<li>
						<a href="#" class="s_btn">行业资讯</a>
					</li>
				</ul>
			</li>
		</ul>
		<a href="#" class="nav-start-btn ui-btn gradient-primary ">开始制作</a>
	</div>
</div>

<script type="text/javascript" src="js/nav.js"></script>