polyfills.js

// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
// http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating

// requestAnimationFrame polyfill by Erik Möller. fixes from Paul Irish and Tino Zijdel

// MIT license

(function requestAnimationFramePolyfill() {
	'use strict';

	var lastTime = 0;
	var vendors = ['ms', 'moz', 'webkit', 'o'];

	for (var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
		window.requestAnimationFrame = window[vendors[x] + 'RequestAnimationFrame'];
		window.cancelAnimationFrame = window[vendors[x] + 'CancelAnimationFrame']
			|| window[vendors[x] + 'CancelRequestAnimationFrame'];
	}

	if (!window.requestAnimationFrame) {
		window.requestAnimationFrame = function (callback, element) {
			var currTime = new Date().getTime();
			var timeToCall = Math.max(0, 16 - (currTime - lastTime));
			var id = window.setTimeout(function () {
					callback(currTime + timeToCall);
				},
				timeToCall);
			lastTime = currTime + timeToCall;
			return id;
		};
	}

	if (!window.cancelAnimationFrame) {
		window.cancelAnimationFrame = function (id) {
			clearTimeout(id);
		};
	}
}());


if (!Function.prototype.bind) {
	Function.prototype.bind = function (oThis) {
		'use strict';

		if (typeof this !== 'function') {
			// ближайший аналог внутренней функции
			// IsCallable в ECMAScript 5
			throw new TypeError('Function.prototype.bind - what is trying to be bound is not callable');
		}

		var aArgs = Array.prototype.slice.call(arguments, 1),
			fToBind = this,
			fNOP = function () {},
			fBound = function () {
				return fToBind.apply(this instanceof fNOP && oThis
						? this
						: oThis,
					aArgs.concat(Array.prototype.slice.call(arguments)));
			};

		fNOP.prototype = this.prototype;
		fBound.prototype = new fNOP();

		return fBound;
	};
}