Canvas半圆 

<!DOCTYPE html>
<html>
 <head>
    <meta charset="utf-8">
    <title>Canvas</title>
 </head>
 <style type="text/css">
 </style>
 <script type="text/javascript">
    function $$(id){
        return document.getElementById(id);
    }
    function pageLoad(){
        var can = $$('can');
        var cans = can.getContext('2d');
        var jindu = 2;
        cans.beginPath();
        cans.arc(60,60,50,0,jindu*Math.PI,false);
        cans.strokeStyle = '#00aae8';
        cans.lineWidth = 15;
        cans.stroke();
        cans.closePath();
    }
 </script>
<body onload="pageLoad();">
    <div style="position: relative;">
        <canvas id="can" width="120px" height="60px"></canvas>
        <div style="position: absolute;top: 32px;left: 41px;font-size: 21px;font-family: '微软雅黑';">50%</div>
    </div>
</body>
</html>

 

posted @ 2014-12-17 09:51  Damon.Wu  阅读(193)  评论(0)    收藏  举报