W3School TIY
（请在下面的文本框中编辑您的代码，然后单击此按钮测试结果。）
编辑您的代码：
<!DOCTYPE html> <html> <body> <button onclick="getMedGroup()" type="button">获得视频的媒体组合</button> <button onclick="setMedGroup()" type="button">设置视频的媒体组合</button> <br /> <br /> <video id="video1" controls="controls"> <source src="../example/html5/mov_bbb.mp4" tppabs="http://w3school.com.cn/example/html5/mov_bbb.mp4" type="video/mp4"> <source src="../example/html5/mov_bbb.ogg" tppabs="http://w3school.com.cn/example/html5/mov_bbb.ogg" type="video/ogg"> Your browser does not support HTML5 video. </video> <video id="video2" controls="controls"> <source src="../example/html5/mov_bbb.mp4" tppabs="http://w3school.com.cn/example/html5/mov_bbb.mp4" type="video/mp4"> <source src="../example/html5/mov_bbb.ogg" tppabs="http://w3school.com.cn/example/html5/mov_bbb.ogg" type="video/ogg"> Your browser does not support HTML5 video. </video> <script> myVid1=document.getElementById("video1"); myVid2=document.getElementById("video2"); function getMedGroup() { alert("Video 1 media group: " + myVid1.mediaGroup + ". Video 2 media group: " + myVid2.mediaGroup); } function setMedGroup() { myVid1.mediaGroup="test"; myVid2.mediaGroup="test"; } </script> </body> </html>
查看结果: