Function.prototype.bind Polyfill (Performace optimized: http://grab.by/2ANj)

prototype.bind.polyfill.js

/**
 * Polyfill for Function.prototype.bind
 * (bind)[https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Function/bind]
 * (You don't need to use $.proxy)[http://www.aaron-powell.com/javascript/you-dont-need-jquery-proxy]
 * Credits: taken from bind_even_never in this discussion: https://prototype.lighthouseapp.com/projects/8886/tickets/215-optimize-bind-bindaseventlistener#ticket-215-9
 */
if (typeof Function.prototype.bind !== "function") {
	Function.prototype.bind = function(context) {
		var fn = this, args = Array.prototype.slice.call(arguments, 1);
		return function(){
			return fn.apply(context, Array.prototype.concat.apply(args, arguments));
		};
	};
}