js切换video的src

<video id="dsp_video" type="video/mp4" class="dsp_video" poster="" controls="controls" preload="none">
	<source id="mysource" src=""></source>
	你的浏览器不支持video播放
</video>
<script type="text/javascript">
	$(".try").each(function(index){
		$(this).click(function(e){				
			//$("#dsp_video>source").attr("src",videoList[index]);  //注意切换source的src无效
			$("#dsp_video").attr("src",videoList[index]);  //必须切换video标签的src
			$("#video_wrap").show();
		});
	});
</script>