javascirpt时钟

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
	<title></title>
	<script type="text/javascript">
		window.onload = function() {
			var oSpan = document.getElementsByTagName("span");

			function getTime() {
				var oTime = new Date();
				var aTime = [oTime.getHours(), oTime.getMinutes(), oTime.getSeconds()];

				for(var i in aTime) {
					oSpan[i].innerHTML = aTime[i].toString().replace(/^(\d)$/, "0$1");
				}
			}

			setInterval(getTime, 1000);
			getTime();
		}
	</script>
</head>
<body>
	<span></span>时
	<span></span>分
	<span></span>秒
</body>
</html>
Have a nice day!!!