super.js

App = { fields: {}, field: {} };

App.field.Field = function(){
  this.callSuper = function(args){
    var name = arguments.callee.caller.$name;
    var parent = new this.parent;
    parent[name].apply(this, args);
  };
  this.render = function(json){
    console.log("Field", json);
  };
  this.$constructor = function() {
    var instance = this;
    for(var name in instance) {
      var fn = instance[name];
      if( typeof fn === 'function') {
        fn.$name = name;
      }
    }
  }
}

App.field.Text = (function(){
  var klass = function() {
    this.$type = "textfield";
    this.parent = App.field.Field;
    this.parent();
    this.render = function(json){
      console.log("Before", json.name);
      this.callSuper(arguments);
      console.log("After", json.name);      
    };
    this.$constructor();
  };
  App.fields["textfield"] = klass;
  return klass;
})();
field = new App.fields["textfield"]();
field.render({ name: "Adalto" });