Milan moved the right way up the table with a comfortable win at the San Siro against Palermo.
Massimiliano Allegri's team was in control from start to finish and deservedly took the lead five minutes before half-time.
Alberto Aquilani nodded down Zlatan Ibrahimovic's cross to Antonio Nocerino for the former Palermo player - who joined Milan an hour before the transfer window shut in the summer - to score his first Milan goal.
Ibrahimovic was again on hand in the 55th minute to slot a brilliant through-ball for Robinho to race onto and stroke home.
Antonio Cassano capped a perfect night for Milan in the 64th minute when Ignazio Abate picked him out unmarked with a deep cross which the striker headed in for his side's third of the night.
Elsewhere, Napoli missed the chance to go top in a disappointing night at the Stadio San Paolo.
Parma took the lead shortly before the hour mark when Sergio Floccari backheeled the ball into the path of Massimo Gobbi, who fired it into the bottom right corner.
The home players thought they had rescued a point when Giuseppe Mascara latched onto Ezequiel Lavezzi's backheel and leveled matters in the 76th minute.
But, eight minutes from time, Sebastian Giovinco sent a powerful pass across the face of goal for the simplest of tap-ins for Francesco Modesto.
Inter, Milan and Napoli are all in Champions League action this week. Inter are away at Lille on Tuesday, when Napoli entertain Bayern Munich. Milan host BATE Borisov on Wednesday.
