Recursive Fizzbuzz with Y-combinator in javascript

recursive-fizzbuzz.js

/* Recursive Fizzbuzz with Y-combinator in javascript...
* Tail-recursion and no loops
* By TiansHUo http://tianshuohu.diandian.com
* Y-combinator from: http://blog.jcoglan.com/2008/01/10/deriving-the-y-combinator/
*/

var Y = function(f) {
  return (function(g) {
    return g(g);
  })(function(h) {
    return function(n,k) {
      return f(h(h))(n,k);
    };
  });
};


var fizzbuzz=Y(function(f){
    return function(n,k){
        k=k||[];
        if(n>0){
            if(n%15==0) {
                k.push("fizzbuzz");
            }else if(n%3==0){
                k.push("fizz");
            }else if(n%5==0){
                k.push("buzz");
            }else{
                k.push(n);
            }
            f(n-1,k);
        }else{
            return document.write(k.reverse());
        }
    };
});

fizzbuzz(35);
​