By STEPHEN BERNARD Stock futures eased off their highs Wednesday, but were still slightly positive, as investors cautiously wait for details about a potential rescue package for Greece.Stocks surged Tuesday as investors expected Greece to get help from the European Union for its mounting debt problem. The Dow Jones industrial average rallied more than 150 points Tuesday, a day after it closed below 10,000 for the first time in three months.Major European markets all rose Wednesday.EU leaders and Jean-Claude Trichet, the president of the European Central Bank, are scheduled to meet Thursday to discuss the economic health of nations that use the euro.Markets have dropped in recent weeks over concerns that debt problems in countries like Greece, Spain and Portugal would spread and upend a global economic recovery.