Unable to locate object using _itemRef

Hi ,

I m trying to click a menu where each sub menu is only

differentiated by _itemRef number . its an AJAX web application . how
can i click a submenu using _itemRef number in watir.what should i use
to click it like
ie.link(:_itemRef,8).click or what i don’t know . it is unable to locate
the object using id or name property .please help