function.create.js

Function.prototype.construct = function(){
  function emptyFunction(){};
  emptyFunction.prototype = this.prototype;
  return new emptyFunction;
}

Function.prototype.create = function(){ 
  var instance = this.construct();
  this.apply(instance, arguments);
  return instance;
}


function Frog(name){
  this.name = name+' the frog';
}
Frog.prototype.is_a_frog = true;

dir(new Frog('Sam'))
dir(Frog.create('Sam'))