File: //usr/share/doc/libjs-excanvas/examples/testcases/gradient2.html
<!DOCTYPE html>
<html>
<head>
<title>Gradient Test</title>
<style>
body {
text-align: center
}
</style>
<!--[if IE]><script type="text/javascript" src="../excanvas.js"></script><![endif]-->
<script>
window.onload = function() {
var ctx = document.getElementById('c').getContext('2d');
var g1 = ctx.createLinearGradient(0, 0, 300, 200);
g1.addColorStop(0.0, 'rgba(0, 255, 0, 0.0)');
g1.addColorStop(1.0, 'rgba(0, 255, 0, 1.0)');
var g2 = ctx.createLinearGradient(0, 0, 300, 200);
g2.addColorStop(0.0, 'rgba(0, 255, 0, 1.0)');
// VML Bug
g2.addColorStop(1.0, 'rgba(0, 0, 0, 0.0)');
ctx.fillStyle = g1;
ctx.fillRect(0, 0, 300, 100);
ctx.fillStyle = g2;
ctx.fillRect(0, 100, 300, 100);
};
</script>
</head>
<body>
<canvas id=c width=300 height=200></canvas>
<p>This tests gradients</p>
</body>
</html>