Menu: Only look for .ui-menu-item elements to determine if a menu item is the first or last element in the menu. Fixes #5528 - Autocomplete: Issue when try to navigate using up key by keyboard in IE6.
Menu: Only look for .ui-menu-item elements to determine if a menu item is the first or last element in the menu. Fixes #5528 - Autocomplete: Issue when try to navigate using up key by keyboard in IE6.

GrayYoung/jQuery.UI.Extension,GrayYoung/jQuery.UI.Extension