<!DOCTY
PE ht
ML><head>
<
;meta charset=utf-8>
<t
ITle>HTML5画
圆形</title>
<script src="<a
href="http://ajax.
GOOGLEapis
.COM/ajax/libs/
jquery/1.7.1/jquery.min.js"></script">http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script</a>>
</head>
<script>
$(document).ready(function(){
VAR c=document.getElementById("drawbox");
var draw=c.getContext("2d"); //获取2d内容的引用,调用绘图API</p>
<p>draw.fillStyle="
red"; //颜色
draw.be
ginPath(); //从新画
draw.arc(50,50,50,0,Math.PI*2,true); //圆心x坐标|圆心y坐标|直径|始|PI为
圆周率,Math.PI*2为画圆|true为时针
方向:逆时针,0为顺时针,
draw.closePath(); //结束
draw.fill();
})
</script>
</body>
<canvas id="drawbox" width="500" h
eight="500"></canvas>
</body>
</html>