How to use AES.encrypt/AES.decrypt?

Try something like this

//RNG.js

// Generates a 16 byte block of random numbers using AES
 //RNG.js
function RNG(){
 this.key1=new Uint8Array(16);
 this.R=new Uint8Array(16);
 this.plain=new Uint8Array(16);
}//end RNG

RNG.prototype.random=function(A){
var i;
E.srand(E.hwRand()); //randomize
  for(i=0;i<16;i++)this.plain[i]=(Math.ran­dom()*256)%256;
  this.R=AES.encrypt(this.plain,this.key1)­;
  for(i=0;i<16;i++)A[i]=this.R[i];
};//end random

RNG.prototype.setup_random=function(){
 for(var i=0;i<16;i++){
  E.srand(E.hwRand());
  this.key1[i]=parseInt((Math.random()*256­),10);
 }
};//end setup_random

//exports = RNG;


function testit(){
 var i;
 var A=new Uint8Array(16);
// var W=new (require("RNG"))();
 var W=new RNG();
 W.setup_random();
  for(i=0;i<16;i++){
   W.random(A);
   console.log(A);
  }
}

testit();