>thanks, i will start studying up. >it never ends does it? Ain't that the troof brother, ain't that the troof. -- Victor Eijkhout <eijkhout at cs.utk.edu> tel: 865 974 9308 (W), 865 673 6998 (H), 865 974 8296 (F) http://www.cs.utk.edu/~eijkhout/