function openVideo(id, width, height) {
	if (typeof(width) == "undefined") {
		width = 950;
	}
	if (typeof(height) == "undefined") {
		height = 768;
	}
	var offsetLeft = screen.width / 2 - width / 2;
	var offsetTop = screen.height / 2 - height / 2;
	window.open('index.php?id='+id, 'tutWin', 'width='+width+',height='+height+',left='+offsetLeft+',top='+offsetTop+',location=no,menubar=no,resizable=no,status=no,toolbar=no,scrollbars=no');
}