prototype_tryout.js

Address = function(options) {
  this.city = options.city || 'Budapest';
  this.country = options.country || 'Hungary';
  this.street = options.street || 'Szep utca';
  this.summary = function() {
    return this.street + ', ' + this.city + ', ' + this.country + ' (' + this.type + ')';
  };
}

Object.create = function(o) {
  var F = function() {};
  F.prototype = o;
  return new F();
}

var fields = { street: 'Huba vezer utca' };

Billing = function(options) {
  this.type = 'BI';
}
Billing.prototype = new Address(fields);

Shipping = function(options) {
  this.type = 'SH';
}
Shipping.prototype = new Address(fields);

//var bi = Object.create(new Address({ street: 'Huba vezer utca' }));
//bi.type = 'BI';
//
//bi = new Billing({ street: 'Huba vezer utca' });
//sh = new Shipping({ country: 'US', city: 'San Francisco', street: 'Main Street' });

bi = new Billing();
sh = new Shipping();

print(bi.summary());
print(sh.summary());