window.addEvent('domready', function(){   
        $('pull_navi').getElements('li#pull_menu').each( function( elem ){   
            var list = elem.getElement('ul#pull_links');   
            var myFx = new Fx.Slide(list).hide();   
            elem.addEvents({   
                'mouseenter' : function(){   
                    myFx.cancel();   
                    myFx.slideIn();   
                },   
                'mouseleave' : function(){    
                    myFx.cancel();   
                    myFx.slideOut();   
                }   
            });   
        })   
    });