<!DOCTYPE HTML>
<html>
<head>
<title>Horizontal Line</title>
</head>
<body>
<canvas id="c" width="128" height="64" style="direction:ltr"></canvas>
<script type="text/javascript">
  var canvas = document.getElementById('c');
  var ctx = canvas.getContext('2d');

  ctx.strokeStyle = 'black';
  ctx.beginPath();
  ctx.moveTo(0,32);
  ctx.lineTo(128,32);
  ctx.stroke();

</script>
</body>
</html>