gistfile1.js

var Fighter = gamecore.Base.extend('Fighter',
  {
      // static (this is inherited as well)
      firingSpeed: 1000
  },
  {
      // instance
      hp: 0,

      init: function(hp)    // instance constructor
      {
          this.hp = hp;
      },

      fire: function()
      {
          this._super(); // super methods!
          // do firing!
      }
  });

 var gunship = new Fighter(100);