The article briefly introduces the development of HTML5 specification, then explains and demonstrates HTML5's new features compared to HTML4, so HTML5 enables native audio and video playback in the browsers on which is laid more emphasis. At last, the article concisely describes some HTML4's features changed significantly in HTML5 specification.%本文首先简要介绍了HTML5的发展,然后详细说明并实例演示了HTML5在HTML4标准基础上新增的一些重要功能;着重介绍了HTML5在对视频和声频技术支持上的改进;最后概括地说明了HTML4的一些元素在HTML5标准中的变化.
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