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<!--
Any copyright is dedicated to the Public Domain.
-->
<html>
<script type="text/javascript">
window.onload = function() {
var c = document.getElementById("b");
var ctx = c.getContext("2d");
ctx.fillStyle = "rgb(0,0,0)";
ctx.fillRect(0,0,100,100);
}
</script>
<style>
#a {
width: 200px;
height: 200px;
background-color: rgb(0,255,0);
}
#b {
width: 100px;
height: 100px;
}
</style>
<div id="a">
<canvas width="100" height="100" id="b"/>
</div>
</html>