code: function(expandedKey,roundKeyPointer)
  		{
  			var roundKey = [];
  			for (var i = 0; i < 4; i++)
  				for (var j = 0; j < 4; j++)
  					roundKey[j*4+i] = expandedKey[roundKeyPointer + i*4 + j];
  			return roundKey;
  		}
docs: Creates a round key from the given expanded key and the position within the expanded key.