这周不小心看到了百度百科的页面导航效果，感觉挺不错的，周末抽空写了下。
下图为导航部分的效果图：
css和图片都是抄百度的，可从百度百科下载。
具体的代码如下：
复制代码 代码如下:
<！DOCTYPE html>
<html>
<head>
<title></title>
<meta charset="utf-8">
<link rel="stylesheet" href="baidu.css">
<style>
* {
margin: 0;
padding: 0
}
.wrap {
width: 1000px;
overflow: hidden;
margin: 0 auto;
}
.content {
width: 780px;
float: left;
}
.slide {
width: 200px;
float: right;
}
</style>
</head>
<body>
<div class="wrap">
<div class="content">
<h2 class="headline-1">
<a class="anchor-1" name="1"></a>
<span class="headline-1-index">1</span>
<span class="headline-content">part1</span>
</h2>
<div class="para">
content1,content1
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</div>
<h2 class="headline-1">
<a class="anchor-1" name="2"></a>
<span class="headline-2-index">2</span>
<span class="headline-content">part2</span>
</h2>
<div class="para">
content2,content2
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</div>
<h2 class="headline-1">
<a class="anchor-1" name="2-1"></a>
<span class="headline-2-index">2-1</span>
<span class="headline-content">part2-1</span>
</h2>
<div class="para">
content2-1,content2-1
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</div>
<h2 class="headline-1">
<a class="anchor-1" name="2-2"></a>
<span class="headline-1-index">2-2</span>
<span class="headline-content">part2-2</span>
</h2>
<div class="para">
content2-2,content2-2
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</div>
<h2 class="headline-1">
<a class="anchor-1" name="3"></a>
<span class="headline-1-index">3</span>
<span class="headline-content">part3</span>
</h2>
<div class="para3">
content,content
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</div>
<h2 class="headline-1">
<a class="anchor-1" name="4"></a>
<span class="headline-1-index">4</span>
<span class="headline-content">part4</span>
</h2>
<div class="para4">
content,content
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</div>
<h2 class="headline-1">
<a class="anchor-1" name="5"></a>
<span class="headline-1-index">5</span>
<span class="headline-content">part5</span>
</h2>
<div class="para">
content5,content5
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</div>
<h2 class="headline-1">
<a class="anchor-1" name="6"></a>
<span class="headline-1-index">6</span>
<span class="headline-content">part6</span>
</h2>
<div class="para">
content6,content6
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</div>
<h2 class="headline-1">
<a class="anchor-1" name="7"></a>
<span class="headline-1-index">7</span>
<span class="headline-content">part7</span>
</h2>
<div class="para">
content7,content7
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</div>
<h2 class="headline-1">
<a class="anchor-1" name="8"></a>
<span class="headline-1-index">8</span>
<span class="headline-content">part8</span>
</h2>
<div class="para">
content8,content8
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</div>
<h2 class="headline-1">
<a class="anchor-1" name="9"></a>
<span class="headline-1-index">9</span>
<span class="headline-content">part9</span>
</h2>
<div class="para">
content9,content9
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</div>
<h2 class="headline-1">
<a class="anchor-1" name="10"></a>
<span class="headline-1-index">10</span>
<span class="headline-content">part10</span>
</h2>
<div class="para">
content10,content10
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</div>
<h2 class="headline-1">
<a class="anchor-1" name="11"></a>
<span class="headline-1-index">11</span>
<span class="headline-content">part11</span>
</h2>
<div class="para">
content11,content11
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</div>
<h2 class="headline-1">
<a class="anchor-1" name="12"></a>
<span class="headline-1-index">12</span>
<span class="headline-content">part12</span>
</h2>
<div class="para">
content12,content12
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</div>
<h2 class="headline-1">
<a class="anchor-1" name="13"></a>
<span class="headline-1-index">13</span>
<span class="headline-content">part13</span>
</h2>
<div class="para">
content13,content13
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</div>
<h2 class="headline-1">
<a class="anchor-1" name="14"></a>
<span class="headline-1-index">14</span>
<span class="headline-content">part14</span>
</h2>
<div class="para">
content14,content14
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</div>
<h2 class="headline-1">
<a class="anchor-1" name="15"></a>
<span class="headline-1-index">15</span>
<span class="headline-content">part15</span>
</h2>
<div class="para">
content15,content15
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
bottom
</div>
</div>
<div class="slide">
<div id="sideToolbar" style="display: block; position: fixed;">
<div id="sideCatalog" class="sideCatalogBg" style="visibility: visible;">
<div id="sideCatalog-sidebar">
<div class="sideCatalog-sidebar-top"></div>
<div class="sideCatalog-sidebar-bottom"></div>
</div>
<div id="sideCatalog-updown" style="visibility: visible;">
<div id="sideCatalog-up" class="sideCatalog-up-disable" title="向上翻页"></div>
<div id="sideCatalog-down" class="sideCatalog-down-enable" title="向下翻页"></div>
</div>
<div id="sideCatalog-catalog">
<dl style="width:175px;zoom:1">
<dd id="sideToolbar-item-0-1" class="sideCatalog-item2 heightlight">
<span class="sideCatalog-index1">1</span>
<a class="nslog:1026" onclick="return false;" title="part1" href="#1">part1</a>
<span class="sideCatalog-dot"></span>
</dd>
<dd id="sideToolbar-item-0-2" class="sideCatalog-item1">
<span class="sideCatalog-index1">2</span>
<a class="nslog:1026" onclick="return false;" title="part2" href="#2">part2</a>
<span class="sideCatalog-dot"></span>
</dd>
<dd id="sideToolbar-item-0-2-1" class="sideCatalog-item2">
<span class="sideCatalog-index1">2-1</span>
<a class="nslog:1026" onclick="return false;" title="part2" href="#2-1">part2-1</a>
<span class="sideCatalog-dot"></span>
</dd>
<dd id="sideToolbar-item-0-2-2" class="sideCatalog-item2">
<span class="sideCatalog-index1">2-2</span>
<a class="nslog:1026" onclick="return false;" title="part2" href="#2-2">part2-2</a>
<span class="sideCatalog-dot"></span>
</dd>
<dd id="sideToolbar-item-0-3" class="sideCatalog-item1">
<span class="sideCatalog-index1">3</span>
<a class="nslog:1026" onclick="return false;" title="part3" href="#3">part3</a>
<span class="sideCatalog-dot"></span>
</dd>
<dd id="sideToolbar-item-0-4" class="sideCatalog-item1">
<span class="sideCatalog-index1">4</span>
<a class="nslog:1026" onclick="return false;" title="part4" href="#4">part4</a>
<span class="sideCatalog-dot"></span>
</dd>
<dd id="sideToolbar-item-0-5" class="sideCatalog-item1">
<span class="sideCatalog-index1">5</span>
<a class="nslog:1026" onclick="return false;" title="part5" href="#5">part5</a>
<span class="sideCatalog-dot"></span>
</dd>
<dd id="sideToolbar-item-0-6" class="sideCatalog-item1">
<span class="sideCatalog-index1">6</span>
<a class="nslog:1026" onclick="return false;" title="part6" href="#6">part6</a>
<span class="sideCatalog-dot"></span>
</dd>
<dd id="sideToolbar-item-0-7" class="sideCatalog-item1">
<span class="sideCatalog-index1">7</span>
<a class="nslog:1026" onclick="return false;" title="part7" href="#7">part7</a>
<span class="sideCatalog-dot"></span>
</dd>
<dd id="sideToolbar-item-0-8" class="sideCatalog-item1">
<span class="sideCatalog-index1">8</span>
<a class="nslog:1026" onclick="return false;" title="part8" href="#8">part8</a>
<span class="sideCatalog-dot"></span>
</dd>
<dd id="sideToolbar-item-0-9" class="sideCatalog-item1">
<span class="sideCatalog-index1">9</span>
<a class="nslog:1026" onclick="return false;" title="part9" href="#9">part9</a>
<span class="sideCatalog-dot"></span>
</dd>
<dd id="sideToolbar-item-0-10" class="sideCatalog-item1">
<span class="sideCatalog-index1">10</span>
<a class="nslog:1026" onclick="return false;" title="part10" href="#10">part10</a>
<span class="sideCatalog-dot"></span>
</dd>
<dd id="sideToolbar-item-0-11" class="sideCatalog-item1">
<span class="sideCatalog-index1">11</span>
<a class="nslog:1026" onclick="return false;" title="part11" href="#11">part11</a>
<span class="sideCatalog-dot"></span>
</dd>
<dd id="sideToolbar-item-0-12" class="sideCatalog-item1">
<span class="sideCatalog-index1">12</span>
<a class="nslog:1026" onclick="return false;" title="part12" href="#12">part12</a>
<span class="sideCatalog-dot"></span>
</dd>
<dd id="sideToolbar-item-0-13" class="sideCatalog-item1">
<span class="sideCatalog-index1">13</span>
<a class="nslog:1026" onclick="return false;" title="part13" href="#13">part13</a>
<span class="sideCatalog-dot"></span>
</dd>
<dd id="sideToolbar-item-0-14" class="sideCatalog-item1">
<span class="sideCatalog-index1">14</span>
<a class="nslog:1026" onclick="return false;" title="part14" href="#14">part14</a>
<span class="sideCatalog-dot"></span>
</dd>
<dd id="sideToolbar-item-0-15" class="sideCatalog-item1">
<span class="sideCatalog-index1">15</span>
<a class="nslog:1026" onclick="return false;" title="part15" href="#15">part15</a>
<span class="sideCatalog-dot"></span>
</dd>
</dl>
</div>
</div>
<a id="sideCatalogBtn" class="" style="visibility: visible;" href="javascript:void（0）;"></a>
<a id="sideToolbar-up" style="visibility: visible;" title="返回顶部" href="javascript:void（0）"></a>
</div>
</div>
</div>
<script type="text/javascript" src="../jquery-1.7.2.js"></script>
<script>
var slideInnerHeight = $（"#sideCatalog-catalog dl"）.height（）;
var slideOutHeight = $（"#sideCatalog-catalog"）.height（）;
var enableTop = slideInnerHeight - slideOutHeight;
var step = 50;
//点击向上的按钮
$（"#sideCatalog-down"）.bind（"click", function （） {
if （$（this）.hasClass（"sideCatalog-down-enable"）） {
if （（enableTop - Math.abs（parseInt（$（"#sideCatalog-catalog dl"）.css（"top"）））） > step） {
$（"#sideCatalog-catalog dl"）.stop（）.animate（{"top": "-=" + step}, "fast"）;
$（"#sideCatalog-up"）.removeClass（"sideCatalog-up-disable"）.addClass（"sideCatalog-up-enable"）;
} else {
$（"#sideCatalog-catalog dl"）.stop（）.animate（{"top": -enableTop}, "fast"）;
$（this）.removeClass（"sideCatalog-down-enable"）.addClass（"sideCatalog-down-disable"）;
}
} else {
return false;
}
}）
//点击向下的按钮
$（"#sideCatalog-up"）.bind（"click", function （） {
if （$（this）.hasClass（"sideCatalog-up-enable"）） {
if （Math.abs（parseInt（$（"#sideCatalog-catalog dl"）.css（"top"））） > step） {
$（"#sideCatalog-catalog dl"）.stop（）.animate（{"top": "+=" + step}, "fast"）;
$（"#sideCatalog-down"）.removeClass（"sideCatalog-down-disable"）.addClass（"sideCatalog-down-enable"）;
} else {
$（"#sideCatalog-catalog dl"）.stop（）.animate（{"top": "0"}, "fast"）;
$（this）.removeClass（"sideCatalog-up-enable"）.addClass（"sideCatalog-up-disable"）;
}
} else {
return false;
}
}）
//点击导航中的各个目录
$（"#sideCatalog-catalog dl"）.delegate（"dd", "click", function （e） {
var index = $（this）.index（）;
scrollSlide（$（this）, index）;
var ddId = $（this）.find（"a"）.stop（）.attr（"href"）.substring（1）;
var windowTop = $（"a[name="" + ddId + ""]"）.offset（）.top;
$（"body,html"）.animate（{scrollTop: windowTop}, "fast"）;
$（this）.addClass（"heightlight"）.siblings（"dd"）.removeClass（"heightlight"）;
}）
//滚动页面，即滚动条滚动
$（document）.scroll（function （） {
var len = $（".headline-1"）.length;
for （var i=len-1; i>=0; i--） {
if （$（this）.scrollTop（） >= $（".headline-1"）.eq（i）.offset（）.top - $（".headline-1"）.eq（i）.height（）） {
var index = i;
$（"#sideCatalog-catalog dl dd"）.eq（index）.addClass（"heightlight"）.siblings（"dd"）.removeClass（"heightlight"）;
scrollSlide（$（"#sideCatalog-catalog dl dd"）.eq（index）, index）;
return false;
} else {
$（"#sideCatalog-catalog dl dd"）.eq（0）.addClass（"heightlight"）.siblings（"dd"）.removeClass（"heightlight"）;
}
}
}）
//导航的滚动，以及向上，向下按钮的显示隐藏
function scrollSlide（that, index）{
if （index < 5） {
$（"#sideCatalog-catalog dl"）.stop（）.animate（{"top": "0"}, "fast"）;
$（"#sideCatalog-down"）.removeClass（"sideCatalog-down-disable"）.addClass（"sideCatalog-down-enable"）;
$（"#sideCatalog-up"）.removeClass（"sideCatalog-up-enable"）.addClass（"sideCatalog-up-disable"）;
} else if （index > 11） {
$（"#sideCatalog-catalog dl"）.stop（）.animate（{"top": -enableTop}, "fast"）;
$（"#sideCatalog-down"）.removeClass（"sideCatalog-down-enable"）.addClass（"sideCatalog-down-disable"）;
$（"#sideCatalog-up"）.removeClass（"sideCatalog-up-disable"）.addClass（"sideCatalog-up-enable"）;
} else {
var dlTop = parseInt（$（"#sideCatalog-catalog dl"）.css（"top"）） + slideOutHeight / 2 - （that.offset（）.top - $（document）.scrollTop（））;
$（"#sideCatalog-catalog dl"）.stop（）.animate（{"top": dlTop}, "fast"）;
$（"#sideCatalog-down"）.removeClass（"sideCatalog-down-disable"）.addClass（"sideCatalog-down-enable"）;
$（"#sideCatalog-up"）.removeClass（"sideCatalog-up-disable"）.addClass（"sideCatalog-up-enable"）;
}
}
</script>
</body>
</html>
大站就是有大站的风范，很多效果还都是他们先开始制作使用，小伙伴们可以经常去逛逛，很容易发现些好东西
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