js代码

<script>
	function displayTime() {
		var elt = document.getElementById("todaydatetime");
		var now = new Date();
		var h = now.getHours();
		var m = now.getMinutes();
		var s = now.getSeconds();
		var ms = now.getMilliseconds();
		elt.innerHTML =h + "小时:" + m + "分:" + s + "秒:" + ms;
		setTimeout(displayTime, 100);
	}
	displayTime();
</script>