// Create a global object named 'Class'
  var Class = {
      // it has a single function that creates a new object constructor
      create: function() {
  
          // Create an anonymous object constructor
          return function() {
              // This calls its own initialization method
              this.initialize.apply(this, arguments);
          }
  
      }
  }
  
  // Add a static method to the Object object which copies
  // properties from one object to another
  Object.extend = function(destination, source) {
      // Go through all of the properties to extend
      for (property in source) {
          // and add them to the destination object
          destination[property] = source[property];
      }
  
      // return the modified object
      return destination;
  }