Allow Filter by Form name or Form id, eg: FLAX.Filter.add({form:form-name-or-id, id:block-id})
use getAttribute() instead of attributes[]
move getLength() out from for()
allow filter by parent "id": FLAX.Filter.add({parent:parent-id, id:block-id}); or parent "class": FLAX.Filter.add({parent:.parent-class, id:block-id});
small formating
version