<!doctype html>
<html>
<head>
<title>Canvaaaaas</title>
<style>
html, body {
width: 100%;
height: 100%;
margin: 0px;
}
</style>
</head>
<body>
<canvas id='myCanvas'></canvas>
</body>
<script>
var w = window.innerWidth;
var h = window.innerHeight;
var canvas = document.getElementById('myCanvas');
if(canvas.getContext){
context = canvas.getContext("2d");
}
</script>
</html>