def bind
      mark_bind
      bind=self.binds
      mark=self
      begin
        binds.image = mark._image
      end while(!binds.image and (mark==mark.proto))
    end
def bind
      mark_bind
      bind=self.binds
      mark=self
      begin
        binds.image = mark._image
      end while(!binds.image and (mark==mark.proto))
    end
Scan the proto chain for an image function.