<!DOCTYPE html>
<html>
<script type="text/javascript">
window.onload = function(){
var canvas = document.getElementById('canvas');
var context = canvas.getContext('2d');
if(context){
context.lineWidth = 5;
context.strokeStyle = "#005588";
context.arc(300,300,200,0,1.5*Math.PI,true);
context.stroke();
}else{
alert('当前浏览器不支持Canvas，请更换浏览器后再试');
}
}
</script>
<body>
<canvas id="canvas" width="800" height="800" style="border:1px solid #aaa;display:block;margin:0 auto;">
当前浏览器不支持Canvas，请更换浏览器后再试
</canvas>
</body>
</html>
跌落尘层的王者
2014-10-19
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