[Moo] Fx.Slide using mouseenter to trigger [still learning]

[genxco]

I was just playing around with one of the demos and I was wondering is
there a way to trigger the Fx.slide by using mouseenter and
mouseleave....

Problem:
mouseenter seems to work just fine it is the mouseleave that is not
working at all.  Can someone give me some pointers....many thanks

Below is just something I modify...

var myVerticalSlide = new Fx.Slide('vertical_slide');
        myVerticalSlide.hide();
        $('v_slidein').addEvents({
                mouseenter: function(e){
                e.stop();
                myVerticalSlide.slideIn();
                },
                mouseleave: function(e){
                        e.stop();
                myVerticaleSlide.slideOut();
                }
        });