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源代码：
点击运行
<!DOCTYPE html> <html> <body> <video id="video1" controls="controls"> <source src="/example/html5/mov_bbb.mp4" type="video/mp4"> <source src="/example/html5/mov_bbb.ogg" type="video/ogg"> Your browser does not support HTML5 video. </video> <script> myVid=document.getElementById("video1"); myVid.ondurationchange=alert("The video duration has changed"); </script> </body> </html>
运行结果