HTML5 - Beginners - Milliseconds Date now.html

<!DOCTYPE = html>
<html><body>
<canvas id="myCanvas" width="640" height="480" style="border:1px solid #d3d3d3;">
Use different browser.
</canvas>
<script>
    var c=document.getElementById("myCanvas");
    var ctx=c.getContext("2d");
	
	function thecounter(){
		this.started = Date.now();
		this.timestarted = function(){
			return this.started
		}
		this.timeelapsed = function(){
			return Date.now() - this.started;
		}
	}
	
	var mycounter = new thecounter();
	gameloop=setInterval(dogameloop,16);
	function dogameloop(){
		ctx.clearRect(0,0,c.width,c.height);
		ctx.fillStyle="black";
		ctx.font="30px Arial";
		ctx.fillText("Start time : "+mycounter.timestarted(),10,30);
		ctx.fillText("TIme Elapsed : "+mycounter.timeelapsed(),10,60);
	}	
</script></body></html>