gistfile1.txt

function isCorner (col, row, size) {
	if ((col==0 && row==0) ||
		(col==size-1 && row==size-1) ||
		(col==0 && row==size-1) ||
		(col==size-1 && row==0)) {
		return true;
	}
}

function isEdge (col, row, size) {
	if ((col==0 || row==0) ||
	 	(col==size-1 || row==size-1)) {
		return true;
	}
}