JS比较学号大小：大于23、小于23、等于23

<!DOCTYPE html>
<html>
<head>
	<title>JS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>