js控制html5 video标签中视频的播放和停止
各位大虾们，请不吝赐教！
页面中有2个普通按钮a，b。还有一个video标签，能成功播放出视频。。
我想要的效果是，点击a按钮，视频开始播放，点击b按钮，视频播放停止！！！
[解决办法]
参见
<!DOCTYPE html>
<html>
<head>
<title>Simple JavaScript Controller</title>
<script type="text/javascript">
function playPause() {
var myVideo = document.getElementsByTagName('video')[0];
if (myVideo.paused)
myVideo.play();
else
myVideo.pause();
}
function makeBig() {
var myVideo = document.getElementsByTagName('video')[0];
myVideo.height = (myVideo.videoHeight * 2 ) ;
}
function makeNormal() {
var myVideo = document.getElementsByTagName('video')[0];
myVideo.height = (myVideo.videoHeight) ;
}
</script>
</head>
<body>
<div class="video-player" align="center">
<video src="myMovie.m4v" poster="poster.jpg" ></video>
<br>
<a href="javascript:playPause();">Play/Pause</a> <br>
<a href="javascript:makeBig();">2x Size</a>
[解决办法]
<a href="javascript:makeNormal();">1x Size</a> <br>
</div>
</body>
</html>
