scenario1-3.js

function capturePhoto()
{
	var video = document.getElementById('videoTag');
	var canvas = document.getElementById('canvasTag');
	var videoWidth = video.videoWidth;
	var videoHeight = video.videoHeight;
	if (canvas.width !== videoWidth || canvas.height !== videoHeight)
	{
		canvas.width = videoWidth;
		canvas.height = videoHeight;
	}
	var ctx = canvas.getContext('2d');
	ctx.drawImage(video, 0, 0, video.videoWidth, video.videoHeight);
}