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class="reftest-wait">
<head>
<script>
function doDraw() {
var ctx = document.getElementById('canvas').getContext('2d');
var grad = ctx.createLinearGradient(0,0,300,300);
grad.addColorStop(0, '#0000ff');
grad.addColorStop(1, '#000000');
ctx.fillStyle = grad;
ctx.fillRect(0,0,300,300);
document.documentElement.removeAttribute('class');
}
</script>
</head>
<body onload="doDraw();">
<canvas id="canvas" width="300" height="300"/>
</body>
</html>