<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>W3Cschool教程(w3cschool.cn)</title>
</head>
<body>
<p id="demo">单击按钮显示指定UNICODE编码的字符。</p>
<button onclick="myFunction()">点我</button>
<script>
function myFunction(){
var n=String.fromCharCode(72,69,76,76,79);
document.getElementById("demo").innerHTML=n;
}
</script>
</body>
</html>