function-bind.js

Function.prototype.bind = (function() {
        }).bind || function(b) {
          if (typeof this !== "function") {
            throw new TypeError("Function.prototype.bind - what is trying to be bound is not callable");
          }
          function c() {
          }

          var a = [].slice, f = a.call(arguments, 1), e = this, d = function() {
            return e.apply(this instanceof c ? this : b || window, f.concat(a.call(arguments)));
          };
          c.prototype = this.prototype;
          d.prototype = new c();
          return d;
        };