<!DOCTY
PE ht
ML><head>
<
;meta charset=utf-8>
<t
ITle>HTML5画矩形</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
draw.fillStyle="
#ff0000"; //方式一指定填充颜色
draw.fillRect(0,0,300,100); //坐标和长
宽draw.fillStyle="rgba(0,0,255,0.5)"; //方式二rgb+透明度
draw.fillRect(400,0,100,100); //坐标和长宽
})
</script>
</body>
<canvas id="drawbox" width="500" h
eight="500"></canvas>
</body>
</html>