Simulates a setInterval call which calls different functions at each interval.

interval.js

var Interval = function(interval) {
  this.interval = interval;
  this.calls = 0;
  this.funcs = [];
};

Interval.prototype.push = function(func, context) {
  this.funcs.push(func.bind(context || window));
};

Interval.prototype.call = function() {
  var func;
  while ((func = this.funcs.shift())) {
    setTimeout(func, this.interval * this.calls);
    this.calls += 1;
  }
};

// tests

var interval = new Interval(1000);

var logFunc = function(i) {
  return function() { console.log('interval: ' + i); };
};

for (var i = 0; i < 10; i += 1) {
  interval.push(logFunc(i));
}

interval.call();