jquery 实现两级导航菜单附效果图

主要用于运维系统，对界面要求不高的场合。深深感到自己页面设计能力弱爆了，只能借鉴一下了，交互逻辑还可以胜任一点。

直接贴代码:

1. HTML 页面及 JS 交互，注意引入 Jquery 文件
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> 
<html> 
<head> 
<meta http-equiv="content-type" content="text/html; charset=UTF-8"> 
<title>两级导航菜单的示例</title> 
<script src="jquery-1.10.1.min.js"></script> 

<!-- moonmm css --> 
<link rel="stylesheet" type="text/css" href="two-nav.css" /> 
<script type="text/javascript"> 

var weeks = ["星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"] 
function showtime() { 
var date = new Date(); 
var yy = date.getYear(); 
if (yy < 1900) { 
yy = yy + 1900; 
} 
var MM = date.getMonth()+1; 
if(MM<10) MM = '0' + MM; 
var dd = date.getDate(); 
if(dd<10) dd = '0' + dd; 
var hh = date.getHours(); 
if(hh<10) hh = '0' + hh; 
var mm = date.getMinutes(); 
if(mm<10) mm = '0' + mm; 
var ss = date.getSeconds(); 
if(ss<10) ss = '0' + ss; 
var ww = weeks[date.getDay()]; 
$('#currTime span').html('[ ' + yy + '-' + MM + '-' + dd + ' ' + hh + ':' + mm + ':' + ss + ' ' + ww + ' ]'); 
window.setTimeout("showtime()", 1000); 
} 

var setContentSize = function(height, width) { 
$('header').css('width', width); 
$('#topnav').css('width', width); 
$('#nav').css('width', width); 
$('#content').css('height', height + 'px'); 
$('#content').css('width', width); 
$('#maincontent').css('height', height + 'px' ); 
$('#maincontent').css('width', width); 
} 

$(document).ready( 
function() { 

var docHeight = $(document).outerHeight(); 
var docWidth = $(document).width(); 
var headerHeight = $('#header').height(); 
var contentHeight = docHeight-headerHeight; 

$('#topnav a').click( 
function() { 
$('.select').removeClass('select'); 
$(this).addClass('select'); 
console.log($(this).css('background-color')); 
$('#nav').css('background-color', $(this).css('background-color')); 
$('#nav').css('width', $('#topnav').width()); 
switch(this.id) { 
case 'topmenu_home': 
$('.nav_list').hide(); 
$('#homebo').show(); 
$('#homebo a').first().click(); 
break; 
case 'topmenu_itlearn': 
$('.nav_list').hide(); 
$('#itlearnbo').show(); 
$('#itlearnbo a').first().click(); 
break; 
case 'topmenu_baike': 
$('.nav_list').hide(); 
$('#baikebo').show(); 
$('#baikebo a').first().click(); 
break; 
case 'topmenu_scisrc': 
$('.nav_list').hide(); 
$('#scisrcbo').show(); 
$('#scisrcbo a').first().click(); 
break; 
case 'topmenu_more': 
$('.nav_list').hide(); 
$('#morebo').show(); 
$('#morebo a').first().click(); 
break; 
default : break; 
} 

} 
); 

$('#nav a').click( 
function() { 
setContentSize(contentHeight, docWidth-15); 
$('#nav .select').removeClass('select'); 
$(this).addClass('select'); 
switch(this.id) { 
case 'myblogModule': 
$('#maincontent').attr('src', 'http://blog.csdn.net/lovesqcc'); 
break; 
case 'ifeveModule': 
setContentSize(contentHeight+80, docWidth-15); 
$('#maincontent').attr('src', 'http://ifeve.com/'); 
break; 
case 'csdnModule': 
$('#maincontent').attr('src', 'http://csdn.net'); 
break; 
case 'infoqModule': 
$('#maincontent').attr('src', 'http://www.infoq.com/cn/'); 
break; 
case 'boleModule': 
$('#maincontent').attr('src', 'http://blog.jobbole.com/'); 
break; 
case 'itcommentModule': 
$('#maincontent').attr('src', 'http://www.vaikan.com/'); 
break; 
case 'wikiModule': 
$('#maincontent').attr('src', 'http://zh.wikipedia.org/zh-tw/Wikipedia'); 
break; 
case 'zhihuModule': 
$('#maincontent').attr('src', 'http://www.zhihu.com/'); 
break; 
case 'acmModule': 
$('#maincontent').attr('src', 'http://www.acm.org/'); 
break; 
case 'xiamiModule': 
$('#maincontent').attr('src', 'http://www.xiami.com'); 
break; 
case 'opencourseModule': 
$('#maincontent').attr('src', 'http://v.163.com/special/ted10collection/'); 
break; 
default: 
break; 
} 

} 
); 
$('.nav_list').hide(); 
$('#topmenu_home').click(); 
showtime(); 
} 
); 
</script> 
</head> 
<body> 
<div id="header"> 
<div id="firstHeader"> 
<div id="logo"> 两级导航菜单 </div> 
<div id="target">两级导航菜单的示例</div> 
<div id="toolbar"> 
<a href="#" id="userinfo">[ 你好: <span style="color:#f47920">admin</span> ]</a> 
<a href="#" id="currTime"><span></span></a> 
<a href="http://aone.alibaba-inc.com/aone2/req/addFromProductline/9139" target="_blank"><span style="color:#f47920">[ 提建议 ]</span></a> 
</div> 
</div> 
<div class="clear"></div> 
<div id="topnav"> 
<div class="topnav_list"> 
<a href="#" class="select" id="topmenu_home"><span>首页</span></a> 
<a href="#" id="topmenu_itlearn"><span>IT学习</span></a> 
<a href="#" id="topmenu_baike"><span>百科</span></a> 
<a href="#" id="topmenu_scisrc"><span>学术资源</span></a> 
<a href="#" id="topmenu_more"><span>更多</span></a> 
</div> 
</div> 
<div class="clear"></div> 

<div id="nav"> 

<div class="nav_list" id="homebo"> 
<a href="#" class="select" id="myblogModule"><span>我的博客</span></a> 
</div> 

<div class="nav_list" id="itlearnbo"> 
<a href="#" class="select" id="ifeveModule"><span>并发编程网</span></a> 
<a href="#" id="csdnModule"><span>CSDN</span></a> 
<a href="#" id="infoqModule"><span>Infoq</span></a> 
<a href="#" id="boleModule"><span>伯乐在线</span></a> 
<a href="#" id="itcommentModule"><span>外刊评论</span></a> 
</div> 

<div class="nav_list" id="baikebo"> 
<a href="#" class="select" id="wikiModule"><span>WIKI百科</span></a> 
<a href="#" id="zhihuModule"><span>知乎</span></a> 
</div> 

<div class="nav_list" id="scisrcbo"> 
<a href="#" class="select" id="acmModule"><span>ACM</span></a> 
</div> 

<div class="nav_list" id="morebo"> 
<a href="#" class="select" id="xiamiModule"><span>虾米音乐</span></a> 
<a href="#" id="opencourseModule"><span>网易公开课</span></a> 
</div> 

</div> 
</div> 
<div id="content"> 
<iframe id="maincontent" frameborder="0" width="100%"></iframe> 
</div> 

</body> 
</html> 

2. CSS 文件 

[css] view plaincopyprint?在CODE上查看代码片派生到我的代码片 

div:not(#topnav, #logo){font-size:10pt!important} 
*{font-family: 微软雅黑, 宋体, san-serif!important} 

/* 
* Header CSS 
*/ 

a{color:#2F649A;} 
a:link{text-decoration:none;} 
a:visited{text-decoration:none;} 
a:hover{text-decoration:underline;} 
a:active{text-decoration:none;} 

body { 
background-color: #dae7f6; 
margin: -0px -0px; 
} 

#firstHeader { 
height: 56px; 
} 

#logo { 
float: left; 
font-size: 28pt; 
margin: 10px 0px 10px 20px; 
font-family: 隶书, 微软雅黑, 宋体, san-serif!important; 
} 

#target { 
float: left; 
font-size: 10.5pt; 
font-style: italic; 
font-weight: 1.5em; 
margin: 25px 30px 0px 5px; 
} 

#toolbar { 
float: right; 
margin: 0px 3px; 
} 

#toolbar a { 
font-size: 10pt; 
} 

#content { 
background-color: #45b97c; 
} 

/* the top menu */ 
#topnav { 
float: left; 
background-color: #426ab3; 
width: 100%; 
} 

#topnav .topnav_list { 
float:left; width: 100%; height:29px; color:#333; margin: 0px 0px -1px 0px; 
font-size: 11pt!important; font-weight:bold; 
border-radius: 5px; 
} 

#topnav .topnav_list a { 
display:inline-block; height:24px; padding: 2px 0 2px 18px; 
color:#fff; vertical-align:middle; line-height:22px; *line-height:24px; cursor:pointer; 
border-radius: 5px; border-right: 2px outset #00BFFF; 
} 

#topnav .topnav_list a span { 
display:inline-block; height:22px; padding:0 20px 0 0; 
border-top-left-radius: 8px; 
border-top-right-radius: 8px; 
border-bottom-left-radius: 0px; 
border-bottom-right-radius: 0px; 
} 

#topnav .topnav_list a:hover, #topnav .topnav_list a.select { 
position:relative; z-index:9; 
background-color: #45b97c; 
color:#fff; text-decoration:none; 
border-top-left-radius: 8px; 
border-top-right-radius: 8px; 
border-bottom-left-radius: 0px; 
border-bottom-right-radius: 0px; 
} 

#topnav .topnav_list a:hover span, #topnav .topnav_list a.select span { 
background-color: #45b97c; 
color:#fff; 
border-radius: 5px; 
} 

.clear { 
clear: both; 
} 

/* the first menu */ 
#nav { 
font-size: 10pt; 
} 

#nav .nav_list { 
float:left; padding: 3px 0 3px 0; font-weight:bold;height:25px; 
} 

#nav .nav_list a { 
display:inline-block; 
padding: 2px 15px 2px 15px; 
color:#fff; vertical-align:middle; line-height:22px; *line-height:24px; cursor:pointer; 
border-radius: 8px; 
border-radius: 8px; 
} 

#nav .nav_list a span { 
display:inline-block; 
border-radius: 8px; 
border-radius: 8px; 
} 

#nav .nav_list a:hover, #nav .nav_list a.select { 
position:relative; z-index:9; 
text-decoration:none; 
border-radius: 8px; 
border-radius: 8px; 
} 

#nav .nav_list a:hover, #nav .nav_list a:hover span { 
background-color: #007d65; 
color: #fff; 
} 

#nav .nav_list a.select, #nav .nav_list a.select span { 
background-color: #fff; 
color: #ca0000; 
} 