hasOwnProperty is faster than "in" operator in V8
hasOwnProperty is faster than "in" operator in V8

gertsonderby/CSSOM,danielweck/CSSOM,NV/CSSOM,modulexcite/CSSOM,danielweck/CSSOM,papandreou/CSSOM,gertsonderby/CSSOM,NV/CSSOM,modulexcite/CSSOM