<html><head><meta charset="utf-8"> <title>手册网(www.shouce.ren)</title> <style> #myDIV { height: 200px; background-color: lightblue; animation: mymove 5s infinite; /* Chrome, Safari, Opera */ animation: mymove 5s infinite;}/* Chrome, Safari, Opera */@-webkit-keyframes mymove { 50% {margin: 50px;}}/* Standard syntax */@keyframes mymove { 50% {margin: 50px;}}</style></head><body><p>逐步改变 margin 属性，从 0px 到 50px:<p><div id="myDIV">This is my DIV element.</div><p>margin 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>