<!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);
????context.stroke();
}else{
alert('當前瀏覽器不支持Canvas，請更換瀏覽器后再試');
}
}
</script>
<body>
<canvas?id="canvas"?width="800"?height="800"?style="border:1px?solid?#aaa;display:block;margin:0?auto;">
當前瀏覽器不支持Canvas，請更換瀏覽器后再試
</canvas>
</body>
</html>
跌落塵層的王者
2014-10-19
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