‘mozHidden’ and ‘mozVisibilityState’ are deprecated.  Please use the unprefixed ‘hidden’ and ‘visibilityState’ instead.
'mozHidden' ແລະ 'mozVisibilityState' ໄດ້ຖືກຍົກເລີກນຳໃຊ້ແລ້ວ. ກະລຸນານຳໃຊ້ unprefixed 'hidden' ແລະ 'visibilityState' ແທນ.