 
     @$container.removeClass("opened")
     @$dropdown.removeClass("opened")
-    @$dropdown.unbind "mouseover mousedown"
+    @$dropdown.unbind "mouseover mousedown mousewheel DOMMouseScroll"
     @$dropdown.remove()
     @opened = false
 


    evt.preventDefault()
    evt.stopImmediatePropagation()
    return

  keydown: (evt) ->


    @$dropdown.bind "mouseover", "li.chosen-option", (evt) => @dropdown_mouseover(evt)
    @$dropdown.bind "mousedown", "li.chosen-option", (evt) => @dropdown_mousedown(evt)
    @$dropdown.bind "mousewheel DOMMouseScroll", (evt) => @prevent_page_scroll(evt)

    @$container.addClass("opened")
    @$dropdown.addClass("opened")
