eventThrottler.js

function eventThrottler(callback) {
  if (!callback) {
      return callback;
  }
    
  // @see http://www.paulirish.com/2011/requestanimationframe-for-smart-animating/
  var requestAnimFrame = (function() {
      return window.requestAnimationFrame   ||
          window.webkitRequestAnimationFrame ||
          window.mozRequestAnimationFrame    ||
          function(callback) {
            window.setTimeout(callback, 1000 / 60);
          };
  })();
  
  return function() {
    if (!callback.__timeout) {
      callback.__timeout = requestAnimFrame(function() {
        callback.__timeout = null;
        callback.apply(this, arguments);
      });
    }
  }
}