Button 'Crazy' to Leave BAR, Says Montoya

Colombian Juan Pablo Montoya believes Briton Jenson Button is "crazy" for leaving the BAR team to drive for Williams next year.

"I think it's crazy, but it's his choice," said Montoya ahead of the Hungarian Grand Prix. "Probably Williams can turn it around, but they got it completely wrong this year. Maybe there's something in BAR he doesn't like or something. The whole team was built around him.

"BAR's results were getting better. In the last race, he had a 10-place penalty and finished second. After that, how your mind goes to go somewhere else I don't know."

Button announced last week that he would drive for Williams next year despite BAR claiming he has a firm contract with them and the row looks likely to rumble on. Montoya, meanwhile, will leave the BMW-powered team to drive for McLaren.

Williams, second in last year's Championship, have dropped down to fourth position this season and have gone over a year without a win. Montoya believes the team can change their fortunes around, but reckons they will have to work hard.

"Williams have to come a long way. They proved last year it can be done and this year will maybe help them do so because they got it completely wrong," he said.