enable js strict mode
enable js strict mode

patrickkettner/picturefill,purposeindustries/picturefill,samiadelgado/picturefill,yubin-huang/picturefill,yufi113/picturefill,chrismcandrew/picturefill,demateu/picturefill,footiealf/picturefill,iancrowther/picturefill,yubin-huang/picturefill,patrickkettner/picturefill,albell/picturefill,chrismcandrew/picturefill,samiadelgado/picturefill,rockmandew/picturefill,scottjehl/picturefill,guardian/picturefill,albell/picturefill,ddeveloperr/picturefill,guardian/picturefill,mcanthony/picturefill,footiealf/picturefill,purposeindustries/picturefill,jansepar/picturefill,scottjehl/picturefill,nucliweb/picturefill,yufi113/picturefill,rockmandew/picturefill,demateu/picturefill,mcanthony/picturefill,ddeveloperr/picturefill,iancrowther/picturefill