// Create a new user object that accepts an object of properties
  function User( properties ) {
      // Iterate through the properties of the object, and make sure
      // that it's properly scoped (as discussed previously)
      for ( var i in properties ) { (function(){
          // Create a new getter for the property
          this[ "get" + i ] = function() {
              return properties[i];
          };
  
          // Create a new setter for the property
          this[ "set" + i ] = function(val) {
              properties[i] = val;
          };
      })(); }
  }
  
  // Create a new user object instance and pass in an object of
  // properties to seed it with
  var user = new User({
      name: "Bob",
      age: 44
  });
  
  // Just note that the name property does not exist, as it's private
  // within the properties object
  alert( user.name == null );
  
  // However, we're able to access its value using the new getname()
  // method, that was dynamically generated
  alert( user.getname() == "Bob" );
  
  // Finally, we can see that it''s possible to set and get the age using
  // the newly generated functions
  user.setage( 22 );
  alert( user.getage() == 22 );