Awesome Interval machiene

Interval.js

var Interval = (function (und){
  return function(fn, time, count){
    if (time !== time-0) return null;
    if (count !== count-0) count = -1;
    switch (count){
      case -1:
        return setInterval(fn, time);
        break;
      case 0:
        return setTimeout(fn, time);
        break;
      default:
        return times(fn, time, count);
        break;
    }
  }
  function times(fn, time, times){
    var count = 0, local;
    return local = setInterval(function(){
      if (++count >= times) clearInterval(local);
      fn();
    }, time);
  }
}());

//Once
Interval(function(){
  console.log("cool");
}, 1000, 0 || 1);
//15 times
Interval(function(){
  console.log("cool");
}, 1000, 15);
//infinite
Interval(function(){
  console.log("cool");
}, 1000, -1);