<html>
<head>
<title>JS实现简单的时钟</title>
<script>
function displayTime() {
document.getElementById("time").innerHTML = new Date().toTimeString();
}
setInterval(displayTime,1000); // 每隔1秒钟调用displayTime函数
</script>
</head>
<body>
<p id="time"></p>
</body>
</html>