The hackers got in sometime early Wednesday morning. ValuJet caught the problem at about 7 a.m. and immediately took down the site (www.valujet.com).
Since ValuJet was purchased by AirTran on Sept. 25, the site, which contained no content, was linked to the AirTran site (www.airtran.com).
The AirTran site, which was on a different server, was not disturbed. The companies are trying to trace the hackers and planned to immediately boost Internet security.
Of the incident, a ValuJet spokeswoman said, "We're not going to comment on something so offensive."
The security breach is the second of a major company within weeks. On Sept. 12, hackers broke into the Coca-Cola site and put up a bizarre anti-Coke message along with a picture of a defaced Coke bottle. The message read, "You'll begin to look at what you drink, to look in your Big Mac . . .And then you'll understand that you are sheeps." The Coke Web site is now back online