​x
 
<!DOCTYPE html>
<html>
<head>
<style> 
div
{
width:100px;
height:100px;
background:red;
position:relative;
animation:mymove infinite;
animation-duration:2s;
​
/* Safari and Chrome */
-webkit-animation:mymove infinite;
-webkit-animation-duration:2s;
}
​
@keyframes mymove
{
from {top:0px;}
to {top:200px;}
}
​
@-webkit-keyframes mymove /* Safari and Chrome */
{
from {top:0px;}
to {top:200px;}
}
</style>
</head>
<body>
​
<p><strong>注释：</strong>Internet Explorer 9 以及更早的版本不支持 animation-name 属性。</p>
​
<div></div>
​
<p><b>注释：</b>始终规定 animation-duration 属性，否则时长为 0，就不会播放动画了。</p>
​
</body>
</html>
​