tryjsref_event_key_which 在线代码实例

实例代码( Tip: 登录后体验更佳 )
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>W3Cschool在线教程(w3cschool.cn)</title>
</head> 
<body>
<p>在输入框中输入键盘上的字符获取按下字母的 Unicode 字符代码。</p>
<input type="text" size="40" onkeypress="myFunction(event)">
<p id="demo"></p>
<p><strong>注意：</strong> IE8 及更早版本不支持该属性。</p>
<script>
function myFunction(event) {
    var x = event.which;
    document.getElementById("demo").innerHTML = " Unicode 值为：" + x;
}
</script>
</body>
</html>
 
 
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运行结果
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