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<!DOCTYPE html> <html> <body> <div style="text-align:center"> <button onclick="playPause()">播放/暂停</button> <button onclick="makeBig()">大</button> <button onclick="makeSmall()">小</button> <button onclick="makeNormal()">正常</button> <br><br> <video id="video1" width="420"> <source src="/i/video/shanghai.mp4" type="video/mp4"> <source src="/i/video/shanghai.ogg" type="video/ogg"> 您的浏览器不支持 HTML 视频。 </video> </div> <script> var myVideo = document.getElementById("video1"); function playPause() { if (myVideo.paused) myVideo.play(); else myVideo.pause(); } function makeBig() { myVideo.width = 560; } function makeSmall() { myVideo.width = 320; } function makeNormal() { myVideo.width = 420; } </script> </body> </html>