var giftWrapping = Class.create(); 
giftWrapping.prototype = { 

        initialize: function() { 
                Element.show('item_giftwrapping');       
                Element.show('giftwrapping_question'); 
                Element.hide('giftwrapping_message'); 
             
                $('giftwrapping_yes').onclick = function() { itemGiftWrapping.answer_yes(); } 
                $('giftwrapping_no').onclick = function() {     itemGiftWrapping.end(); } 
                 
                this.make_centre(); 
        }, 
         
        make_centre: function() { 
                $('giftwrap').value = '1'; 
                var arrayPageSize = getPageSize(); 
                //center the image in the current document view 
                var arrayPageScroll = getPageScroll(); 
                var wrappingTop = arrayPageScroll[1] + (arrayPageSize[3] / 10); 
                var wrappingLeft = arrayPageScroll[0]; 
                Element.setTop('item_giftwrapping_container', wrappingTop); 
                Element.setLeft('item_giftwrapping_container', wrappingLeft); 
                Element.setWidth('item_giftwrapping', arrayPageSize[2]); 
        }, 
         
        answer_yes: function() { 
                Element.hide('giftwrapping_question'); 
                Element.show('giftwrapping_message');    
        }, 
 	         
        end: function() { 
                $('giftwrap').value = '0'; 
                Element.hide('item_giftwrapping'); 
        }

};
 	 
function initGiftWrapping() { itemGiftWrapping = new giftWrapping(); }