<!DOCTYPE html>
<!--
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and open the template in the editor.
-->
<html>
<head>
<title>nav测试</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style type="text/css">
*{margin:0; padding:0}
body{width:960px; height:2000px; margin:0 auto; border: 1px dotted #432432;}
ul,li{list-style-type: none;}
a{text-decoration: none;}
.nav{border:1px solid #000;
height:30px;
z-index:9999;
position:fixed ;
top:0px;
_position:absolute;
_top:expression(documentElement.scrollTop + "px");
}
.nav ul li{
float:left;
font-size: 16px;
line-height: 30px;
padding:0px 63px;
}
.nav ul li:hover{
background: #23ded3;
}
#main{
height:1000px;
border:1px solid #f00;
margin-top:30px;
}
#div1{
height:400px;
border: 1px solid #ccc;
}
#div2{
height:400px;
border: 1px solid #ccc;
}
#div3{
height:400px;
border: 1px solid #ccc;
}
</style>
</head>
<body>
<div id="headr">
<div class="nav">
<ul>
<li><a>首页</a></li>
<li><a onclick="onc()">你好</a></li>
<li><a>很好</a></li>
<li><a>他好</a></li>
<li><a>真的</a></li>
<li><a>哦哦</a></li>
</ul>
</div>
</div>
<div id ="main" style="960px; height: auto;">
<div id="div1">
<p>我是ｄｉｖ１的内容</p>
</div>
<div id="div2">
<p>我是ｄｉｖ2的内容</p>
</div>
<div id="div3">
<p>我是ｄｉｖ3的内容</p>
</div>
</div>
<div id ="footr"></div>
</body>
<script type="text/javascript">
var dHeight = document.documentElement.clientHeight;
var div1 = document.getElementById("div1");
var div2 = document.getElementById("div2");
var div3 = document.getElementById("div3");
div1.style.height = dHeight - 30 + "px"; //通过一个js动态的来确定每个div的高度,还可以通过循环来实现，这里就不加了，各位自己可尝试
div2.style.height = dHeight -30 + "px";
div3.style.height = dHeight -30 + "px";
var li = document.getElementsByTagName("li");
li[0].onclick = function(){
div1.scrollIntoView(false); //这里不能给true不然会将会与导航条重叠
}
li[1].onclick = function(){
div2.scrollIntoView(false);
}
li[2].onclick = function(){
div3.scrollIntoView(false);
}
</script>
</html>
摘自：http://www.tuicool.com/articles/j6zuIbn