tryjsref_event_key_which4 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>在输入框中按下键盘上的按键获取字符和数字。 </p>
<input type="text" size="40" onkeypress="myFunction(event)">
<p id="demo"></p>
<script>
function myFunction(event) {
    var x = event.keyCode || event.which;     // 获取 Unicode 值
    var y = String.fromCharCode(x);           // 将值转换为字符
    document.getElementById("demo").innerHTML = "数字: " + x + " = 字符: " + y;
}
</script>
</body>
</html>
 
 
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运行结果
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