function PuzzlePiece(board, i, dim, isEmpty) {
	.
	.
	.
	function formatDiv(div) {
		div.style.textAlign = 'center';
		div.style.fontFamily = 'Arial';
		div.style.border = 'solid 1px black';
		div.style.fontSize = Math.floor(size * 0.9) + 'px';
		div.style.width = size + 'px';
		div.style.height = size + 'px';
	}

	this.update(i);
	formatDiv(this.div);
};