code: function(column,isInv)
  		{
  			var mult = [];	
  			if(isInv)
  				mult = [14,9,13,11];
  			else
  				mult = [2,1,1,3];
  			var cpy = [];
  			for(var i = 0; i < 4; i++)
  				cpy[i] = column[i];
  			
  			column[0] = 	this.galois_multiplication(cpy[0],mult[0]) ^
  					this.galois_multiplication(cpy[3],mult[1]) ^
  					this.galois_multiplication(cpy[2],mult[2]) ^
  					this.galois_multiplication(cpy[1],mult[3]);
  			column[1] = 	this.galois_multiplication(cpy[1],mult[0]) ^
  					this.galois_multiplication(cpy[0],mult[1]) ^
  					this.galois_multiplication(cpy[3],mult[2]) ^
  					this.galois_multiplication(cpy[2],mult[3]);
  			column[2] = 	this.galois_multiplication(cpy[2],mult[0]) ^
  					this.galois_multiplication(cpy[1],mult[1]) ^
  					this.galois_multiplication(cpy[0],mult[2]) ^
  					this.galois_multiplication(cpy[3],mult[3]);
  			column[3] = 	this.galois_multiplication(cpy[3],mult[0]) ^
  					this.galois_multiplication(cpy[2],mult[1]) ^
  					this.galois_multiplication(cpy[1],mult[2]) ^
  					this.galois_multiplication(cpy[0],mult[3]);
  			return column;
  		}
docs: galois multipication of 1 column of the 4x4 matrix