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<html>3
<head>4
<meta charset="utf-8">5
<title>蜜蜂教程(mifengjc.com)</title>6
<script>7
function isKeyPressed(event) {8
if (event.metaKey == 1) {9
alert("meta键被按下!");10
} else {11
alert("meta键没被按下!");12
}13
}14
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</head>16
<body onmousedown="isKeyPressed(event)">17
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<p>单击文档中的某个地方。一个警告框会告诉你是否你按下meta关键。</p>19
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</body>21
</html>