HTML
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>笔下光年</title>
</head>
<body>
<p>逐步改变背景属性:<p>
<div id="myDIV"></div>
<p>background 属性是所有背景属性的简写属性。</p>
<p>CSS 中仅有 background-color, background-position, 和 background-size 属性支持动画效果。</p>
<p><b>注意：</b>Internet Explorer 9 及更早 IE 版本不支持 CSS 动画。</p>
</body>
</html>
CSS
#myDIV {
width: 300px;
height: 200px;
background: red url('http://example.itshubao.com/index/images/logo.png') no-repeat top left/5px 5px;
-webkit-animation: mymove 5s infinite; /* Chrome, Safari, Opera */
animation: mymove 5s infinite;
}
/* Chrome, Safari, Opera */
@-webkit-keyframes mymove {
50% {background: blue bottom right/50px 50px;}
}
/* Standard syntax */
@keyframes mymove {
50% {background: blue bottom right/50px 50px;}
}