<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<meta name="viewport" content="width=device-width,initial-scale=1">
<script type="text/javascript">
window.onload=function() {
var navbar = document.getElementById('navbar');
var navbarLi = navbar.getElementsByTagName('li');
var content = document.getElementById('content');
var contentDiv = content.getElementsByTagName("div");
for(var i=0;i<navbarLi.length;i++){
navbarLi[i].i=i;
navbarLi[i].onclick=function(){
scroll(contentDiv[this.i]);
}
}
function scroll(obj){
var timer=null;
clearInterval(timer);
timer=setInterval(function(){
if(document.body.scrollTop<obj.offsetTop-380){
document.body.scrollTop+=10;
}
if(document.body.scrollTop>obj.offsetTop-380){
document.body.scrollTop-=10;
}
},1);
}
};
</script>
<style type="text/css">
*{
margin: 0;
padding: 0;
}
header{
width: 100%;
height: 300px;
position: fixed;
top: 0;
}
header div{
width: 100%;
height: 300px;
background-color: pink;
margin: 0 auto;
}
nav{
width: 100%;
height: 50px;
position: fixed;
top: 300px;
}
ul{
width: 100%;
height: 50px;
background-color: gray;
margin: 0 auto;
list-style: none;
}
ul li{
width: 23%;
height: 50px;
float: left;
text-align: center;
line-height: 50px;
margin: 0 1% 0;
background-color: black;
color: white;
}
ul li:hover{
cursor: pointer;
}
#content{
width: 100%;
margin: 380px auto 0;
}
#content div{
width: 100%;
height: 500px;
background-color: pink;
margin-bottom: 30px;
}
</style>
</head>
<body>
<header>
<div>
</div>
</header>
<nav>
<ul id="navbar">
<li>111111111111</li>
<li>222222222222</li>
<li>333333333333</li>
<li>444444444444</li>
</ul>
</nav>
<div id="content">
<div>1111111111111111</div>
<div>2222222222222222</div>
<div>3333333333333333</div>
<div>4444444444444444</div>
</div>
</body>
</html>