Change error message prefix to 'mujs:'.
Change error message prefix to 'mujs:'.

lsm/mujs,earthling42/mujs,ccxvii/mujs,guiquanz/mujs,ccxvii/mujs,Frky/mujs,ccxvii/mujs,evanlabs/mujs,ccxvii/mujs,thurday/mujs,BOGY/mujs