Function.prototype.bind shim

Function.prototype.bind.js

if (typeof Function.prototype.bind != 'function') {
  Function.prototype.bind = (function () {
    var slice = Array.prototype.slice;
    return function (thisArg) {
      var target = this, boundArgs = slice.call(arguments, 1);

      if (typeof target != 'function') throw new TypeError();

      function bound() {
	var args = boundArgs.concat(slice.call(arguments));
	target.apply(this instanceof bound ? this : thisArg, args);
      }

      bound.prototype = (function F(proto) {
          proto && (F.prototype = proto);
          if (!(this instanceof F)) return new F;          
	})(target.prototype);

      return bound;
    };
  })();
}