superhack.js

  // Add a handy super call for all objects
  MyBaseClass.prototype.super = function () {
    var parent = this.__proto__.__proto__;
    var caller = arguments.callee.caller;
    var fn;
    if (caller.prototype === this.__proto__) {
      return parent.constructor.apply(this, arguments);
    } else {
      // This is probably quite slow, but it doesn't seem to affect
      // performance too much in real tests.
      var keys = Object.keys(this.__proto__);
      for(var i=0, l = keys.length; i < l; i++){
        if(this.__proto__[keys[i]] === caller) 
         return parent[keys[i]].apply(this, arguments);
      }
    }
  };

  MyBaseClass.adopt = function (child) {
    child.__proto__ = this;
    child.prototype.__proto__ = this.prototype;
  };