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<html>↩
<head>↩
<script type="text/javascript">↩
window.onload = function() {↩
var ctx = document.getElementById("c1").getContext("2d");↩
ctx.mozFillRule = "evenodd";↩
ctx.rect(50, 50, 200, 200);↩
ctx.rect(100, 100, 100, 100);↩
ctx.clip();↩
↩
ctx.beginPath();↩
ctx.fillRect(0, 0, 300, 300);↩
}↩
</script>↩
</head>↩
<body>↩
<div><canvas id="c1" width="300" height="300"></canvas></div>↩
</body>↩
</html>↩