Online retailers like eBay Inc. can be held responsible for the infringement of trademarks by goods they sell, AP quoted Europe's top court as saying on Tuesday. National courts can order online retailers to stop trademark infringement and prevent similar incidents in the future, the Luxembourg-based European Court of Justice said. The ECJ's clarification of EU laws came in response to questions referred to the court by the High Court in London in 2009. The U.K. court was seeking the ECJ's opinion in a case brought by French cosmetics company L'Oreal SA against eBay. L'Oreal complained that some of its products that were not deemed for sale in Europe were being offered on eBay and that the retailer was not making enough of an effort to prevent such sales. -- SPA