javascript - How to check if all keys in json equal true -

how can check if keys in json object equal true? object looks this

    success = {     "first_name": false,     "middle_name": false,     "last_name": false,     "d_o_b": false,     "sex": false,     "email": false,     "re_email": false,     "password": false,     "re_password": false }; 

i proccess object , every thing turns out ok gets changed true, @ end want check if true, how can this? thank's :-)

or bit more functionally:

object.keys(success).every(function(key) {   return success[key]; });