<html>圆形钟表

2013-11-01 22:56:43 -0400

代码演示：

代码复制:

<script type="text/javascript">
function init(){  
clock();  
setInterval(clock,1000);  
}  
function clock(){  
	  var now = new Date();  
	  var ctx = document.getElementById('canvas').getContext('2d');  
	  ctx.save();  
	  ctx.clearRect(0,0,150,150);  
	  ctx.translate(75,75);  
	  ctx.scale(0.4,0.4);  
	  ctx.rotate(-Math.PI/2);  
	  ctx.strokeStyle = "black";  
	  ctx.fillStyle = "white";  
	  ctx.lineWidth = 8;  
	  ctx.lineCap = "round";  
	  ctx.save();  
	  for (var i=0;i<12;i++){  
		ctx.beginPath();  
		ctx.rotate(Math.PI/6);  
		ctx.moveTo(100,0);  
		ctx.lineTo(120,0);  
		ctx.stroke();  
	  }  
	  ctx.restore();  
	  ctx.save();  
	  ctx.lineWidth = 5;  
	  for (i=0;i<60;i++){  
		if (i%5!=0) {  
		  ctx.beginPath();  
		  ctx.moveTo(117,0);  
		  ctx.lineTo(120,0);  
		  ctx.stroke();  
		}  
		ctx.rotate(Math.PI/30);  
	  }  
	  ctx.restore();  	
	  var sec = now.getSeconds();  
	  var min = now.getMinutes();  
	  var hr  = now.getHours();  
	  hr = hr>=12 ? hr-12 : hr;  
	  ctx.fillStyle = "black";  
	  ctx.save();  
	  ctx.rotate( hr*(Math.PI/6) + (Math.PI/360)*min + (Math.PI/21600)*sec )  
	  ctx.lineWidth = 14;  
	  ctx.beginPath();  
	  ctx.moveTo(-20,0);  
	  ctx.lineTo(80,0);  
	  ctx.stroke();  
	  ctx.restore();  
	  ctx.save();  
	  ctx.rotate( (Math.PI/30)*min + (Math.PI/1800)*sec )  
	  ctx.lineWidth = 10;  
	  ctx.beginPath();  
	  ctx.moveTo(-28,0);  
	  ctx.lineTo(112,0);  
	  ctx.stroke();  
	  ctx.restore();  
	  ctx.save();  
	  ctx.rotate(sec * Math.PI/30);  
	  ctx.strokeStyle = "#D40000";  
	  ctx.fillStyle = "#D40000";  
	  ctx.lineWidth = 6;  
	  ctx.beginPath();  
	  ctx.moveTo(-30,0);  
	  ctx.lineTo(83,0);  
	  ctx.stroke();  
	  ctx.beginPath();  
	  ctx.arc(0,0,10,0,Math.PI*2,true);  
	  ctx.fill();  
	  ctx.beginPath();  
	  ctx.arc(95,0,10,0,Math.PI*2,true);  
	  ctx.stroke();  
	  ctx.fillStyle = "#555";  
	  ctx.arc(0,0,3,0,Math.PI*2,true);  
	  ctx.fill();  
	  ctx.restore();   
	  ctx.beginPath();  
	  ctx.lineWidth = 14;  
	  ctx.strokeStyle = '#325FA2';  
	  ctx.arc(0,0,142,0,Math.PI*2,true);  
	  ctx.stroke();  
	  ctx.restore();  
}  
</script>
<body onload="init();">
<canvas id="canvas" width="150" height="150"></canvas> /TEXTAREA></div>
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