Possible options are 1, 3, 7, 9 - it is a method of hooking of class buttons to the anchor. 1 is top-left, 3 is top-righ, 7 - bottom-left, 9 - bottom right.
Ah well that explains it. I searched for something calles left,upperleft and so on.
Thx very much ... should be no problem finding a place for that neat addon. ^^