function Book(title, author) {  
   this.title = title;  
   this.author = author;  
  }  
   Book.prototype.price = 9.99;  
   Object.prototype.copyright = "herongyang.com";  
   var myBook = new Book("JavaScript Tutorials", "Herong Yang");  
  
   // Dumping built-in properties at the base prototype level  
   document.writeln("/nObject.prototype's built-in properties:");  
   dumpProperty(Object.prototype, "constructor");  
   dumpProperty(Object.prototype, "hasOwnProperty");  
   dumpProperty(Object.prototype, "isPrototypeOf");  
   dumpProperty(Object.prototype, "toString");  
   dumpProperty(Object.prototype, "valueOf");  
   dumpProperty(Object.prototype, "copyright");  
  
   // Dumping built-in properties at the my prototype level  
   document.writeln("/n==================/nBook.prototype's built-in properties:");  
   dumpProperty(Book.prototype, "constructor");  
   dumpProperty(Book.prototype, "hasOwnProperty");  
   dumpProperty(Book.prototype, "isPrototypeOf");  
   dumpProperty(Book.prototype, "toString");  
   dumpProperty(Book.prototype, "valueOf");  
   dumpProperty(Book.prototype, "copyright");  
  
   // Dumping built-in properties at the object level  
   document.writeln("/n==================/nmyBook's built-in properties:");  
   dumpProperty(myBook, "constructor");  
   dumpProperty(myBook, "hasOwnProperty");  
   dumpProperty(myBook, "isPrototypeOf");  
   dumpProperty(myBook, "toString");  
   dumpProperty(myBook, "valueOf");  
   dumpProperty(myBook, "copyright");  
     
function dumpProperty(object, property) {  
   var inheritance;   
   if (object.hasOwnProperty(property))   
      inheritance = "Local";  
   else   
      inheritance = "Inherited";  
   document.writeln(property+": "+inheritance+": "  
      +object[property]);  
} 
//javascript/7073