var array:Array = new Array(  );
array.push({id: 2, alphabet: "d"});
array.push({id: 4, alphabet: "a"});
array.push({id: 3, alphabet: "c"});
array.push({id: 1, alphabet: "b"});

array.sortOn("id");

for (var i:int = 0; i < array.length; i++) {
  trace(array[i].alphabet + "\t" + array[i].id);
}