JavaScript编写的计时器/倒计时也可以改一下参数（用到的图片已经上传）

<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>秒钟计时器</title>
		<script>
		
		function setnumber(n){
			if(n<10)
			return '0'+'0'+n;
			else if(n>=10&&n<=99)
			return '0'+n;
			else
			return ''+n;
		}
		

		window.onload=function(){
			var d=document.getElementsByTagName('img');
			var time=0,time1;
			
			function clik(){
			time=setnumber(time);
			for(var i=0;i<d.length;i++){
				d[i].src='img/'+time.charAt(i)+'.png';
			}
			
			/*if(time==0){
				time=60;
			}*/
			time++;
			}
			time1=setInterval(clik,1000);
			//clik();
		};
			
		</script>
		
	</head>
	<body style="background: black;color: white;font-size: 50px;">
		<img src="img/0.png">
		<img src="img/0.png">
		<img src="img/0.png">
	</body>
</html>

　　运行截图