一个JavaScript 类的实现例子

 book = function(name,count)
  {
    /* instance property*/
    this._pageCount = count;
    
    /* closure start*/
    var _name = name; //private member
    /* instance method */
    this.getName = function()
    {
       return _name;
    }
    /* closure end*/
    
    /*private static member*/
    _type = "class";
  }
  /* public static member */
  book.className = "book";
  
  /* prototype method*/
  book.prototype.getCount = function()
  {
    return this._pageCount;
  };
  
  //static method
  book.getType = function()
  {
      //访问静态的私有变量
    return _type;
  }
  book.getClassName = function()
  {
      //访问静态公有访问
    return this.className;
  }