original (broken) code 


					
		
		
var ReadHash = Class.create();
ReadHash.prototyte = {
  initialize: function(data){
    this.data=data;
  },
  read: function(){
    this.data.each(function(pair) {
      alert(pair.key + ' = "' + pair.value + '"');
    });
  }
};
var ReadMyData = Class.create();
ReadMyData.prototype = Object.extend(new ReadHash(),{
  initialize: function(data){
    this.data=data;
  }
});
var TestReadHash = new ReadMyData($H({ var1: 'foo1', var2: 'foo2' }));
TestReadHash.read();

				
		

		

	
	





rewritten for Prototype 1.6 and later 





	
	

		

		

			
				
				

					
		
		
var ReadHash = Class.create({
  initialize: function(data){
    this.data = data;
  },
  read: function(){
    this.data.each(function(pair) {
      alert(pair.key + ' = "' + pair.value + '"');
    });
  }
});

var ReadMyData = Class.create(ReadHash, {
  initialize: function(data){
    this.data=data;
  }
});

var TestReadHash = new ReadMyData($H({ var1: 'foo1', var2: 'foo2' }));
TestReadHash.read();

				
		

		

	
	





... still, this is how the pros to it 





	
	

		

		

			
				
				

					
		
		
var hash = $H({ foo:1, bar:2 })
alert(hash.inspect())