<video width="450" height="340" controls>
<source src="jamshed.mp4" type="video/mp4">
Your browser does'nt support video embedding feature.
</video>
4.除了音频和视频，HTML5 还支持其他什么新的媒体元素？
HTML 5 对媒体支持很强，除了 audio 和 video 外，还提供：
<embed> 作为外部应用的容器
<track> 定义媒体的文本跟踪
<source> 对多种媒体源的支持很有帮助
5.What is the usage of canvas Element in HTML 5?
<canvas> is an element in HTML5 which we can use to draw graphics with the help of scripting (which is most probably JavaScript).
This element behaves like a container for graphics and rest of things will be done by scripting. We can draw images, graphs and a bit of animations etc using <canvas> element.
更新时间：2014-07-25
