<!DOCTYPE html>
<html>
<head>
<style>
div
{
width:100px;
height:100px;
background:red;
position:relative;
animation:mymove 5s infinite;
-moz-animation:mymove 5s infinite; /* Firefox */
-webkit-animation:mymove 5s infinite; /* Safari and Chrome */
-o-animation:mymove 5s infinite; /* Opera */
}
@keyframes mymove
{
from {top:0px;}
to {top:200px;}
}
@-moz-keyframes mymove /* Firefox */
{
from {top:0px;}
to {top:200px;}
}
@-webkit-keyframes mymove /* Safari and Chrome */
{
from {top:0px;}
to {top:200px;}
}
@-o-keyframes mymove /* Opera */
{
from {top:0px;}
to {top:200px;}
}
</style>
</head>
<body>
<p><b>注释：</b>本例在 Internet Explorer 中无效。</p>
<div></div>
</body>
</html>
原文：http://www.cnblogs.com/pansidong/p/7780181.html