fix class attribute setting for IE7 and lower
fix class attribute setting for IE7 and lower

istrel/basisjs,istrel/basisjs,tyanas/basisjs,fateevv/basisjs,basisjs/basisjs,tyanas/basisjs,smelukov/basisjs,fateevv/basisjs,smelukov/basisjs,istrel/basisjs,tyanas/basisjs,fateevv/basisjs,basisjs/basisjs,smelukov/basisjs,basisjs/basisjs