index.html

<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<title>Canvas-countdown</title>
	<style type="text/css">
	* {
		margin: 0;
		padding: 0;
	}
	html {
  		width:100%;
  		height:100%;
	}
	body {
  		width:100%;
  		height:100%;
	}
	#canvas {
  		width:100%;
  		height:100%;
	}
	</style>
</head>
<body>
	<canvas id="canvas">
		当前浏览器不支持canvas，请更换浏览器后再试
	</canvas>
	<script type="text/javascript" src="digit.js"></script>
	<script type="text/javascript" src="main.js"></script>
</body>
</html>