*474 OPINION

Here, both sides raise numerous issues on appeal and cross-appeal. After reviewing the record, we conclude the issues presented are either raised for the first time on appeal, supported by no relevant authority, or concern determinations which are based on substantial evidence. For these reasons, and because neither side has affirmatively demonstrated error, the judgment is affirmed. Peot v. Peot, 92 Nev. 388, 551 P.2d 242 (1976). Charmicor, Inc. v. Bradshaw Finance Co., 92 Nev. 310, 550 P.2d 413 (1976); Alves v. Bumguardner, 91 Nev. 799, 544 P.2d 436 (1975); County of Clark v. Lucas, 91 Nev. 263, 534 P.2d 499 (1975); Kulik v. Albers Incorporated, 91 Nev. 134, 532 P.2d 603 (1975); Solar, Inc. v. Electric Smith Constr., 88 Nev. 457, 499 P.2d 649 (1972).

Affirmed.