evenodd-fill-3.html
<html>
<head>
<script type="text/javascript">
window.onload = function() {
var ctx = document.getElementById("c1").getContext("2d");
ctx.mozFillRule = "evenodd";
ctx.moveTo(50, 50);
ctx.lineTo(250, 50);
ctx.lineTo(250, 250);
ctx.lineTo(50, 250);
ctx.lineTo(50, 50);
ctx.moveTo(100, 100);
ctx.lineTo(100, 200);
ctx.lineTo(200, 200);
ctx.lineTo(200, 100);
ctx.lineTo(100, 100);
ctx.fill();
}
</script>
</head>
<body>
<div><canvas id="c1" width="300" height="300"></canvas></div>
</body>
</html>
