Using ajax to post multiple checkbox selection for google forms -

Using ajax to post multiple checkbox selection for google forms -

i'm trying post google spreadsheet using modified version of form generated. i'm using json script populate list of checkboxes selecting , able display fine. however, when trying post form using javascript/ajax i'm running issues. followed directions @ base22 me there, checkbox info giving me problems. using firebug , original form see each checked checkbox should posted such:

entry.978961699 alternative 1 entry.978961699 alternative 2

however, i'm not sure how this. i'm able different variations:

entry.978961699[] alternative 1 entry.978961699[] alternative 2

or

entry.978961699 alternative 1, alternative 2

or

entry.978961699[arrayname[]][] alternative 1 entry.978961699[arrayname[]][] alternative 2

none of allow form post. can point me in right direction?

thanks.

ajax google-form