The US dollar traded just below the 78 yen line in early Tokyo deals Monday, almost unchanged from its late Friday levels in New York. At 9 a.m., the dollar fetched 77.96-98 yen compared with 77.90- 78.00 yen in New York and 77.57-58 yen in Tokyo at 5 p.m. Friday. The euro was quoted at 1.2810-2815 U.S. dollars and 99.87-89 yen against 1.2855-2865 U.S. dollars and 100.05-15 yen in New York and 1.2931-2932 U.S. dollars and 100.31-35 yen in Tokyo late Friday afternoon.