案例：html/html5 案例     状态：可编辑再运行    进入竖版
 运行结果　
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<!DOCTYPE html>
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<html>
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<body>
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​
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<button onclick="enableControls()" type="button">启动控件</button>
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<button onclick="disableControls()" type="button">禁用控件</button>
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<button onclick="checkControls()" type="button">检查控件的状态</button>
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<br>
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<video id="video1">
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  <source src="/example/html5/mov_bbb.mp4" type="video/mp4">
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  <source src="/example/html5/mov_bbb.ogg" type="video/ogg">
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  Your browser does not support HTML5 video.
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</video>
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​
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<script>
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myVid=document.getElementById("video1");
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function enableControls()
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  {
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  myVid.controls=true;
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  myVid.load();
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  }
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function disableControls()
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  {
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  myVid.controls=false;
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  myVid.load();
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  }
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function checkControls()
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  {
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  alert(myVid.controls);
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  }
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</script>
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​
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</body>
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</html>
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​