用js语言写一个在空格里填入学号单击按钮后若学号大于23输出比23大若学号比23小则输出比23小若学号等于23输出比23相等
<!DOCTYPE html>
<html>
<head>
<title>比较学号大小</title>
<meta charset="utf-8">
<script type="text/javascript">
function compare(){
var num = document.getElementById("num").value;
if(num > 23){
document.getElementById("result").innerHTML = "比23大";
}else if(num < 23){
document.getElementById("result").innerHTML = "比23小";
}else{
document.getElementById("result").innerHTML = "与23相等";
}
}
</script>
</head>
<body>
<label>请输入学号：</label>
<input type="text" id="num" placeholder="请输入学号">
<button onclick="compare()">比较</button>
<p id="result"></p>
</body>
</html>
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