jQuery: Group Form checkboxes by name attribute [duplicate]

This question already has an answer here:

• Can I pass multiple checkbox values with one name? 2 answers

i'm having a form with several checkboxes like:

<input type='checkbox' name='project' value='1'>
<input type='checkbox' name='project' value='2'>
<input type='checkbox' name='project' value='3'>

<input type='checkbox' name='user' value='4'>
<input type='checkbox' name='user' value='5'>
<input type='checkbox' name='user' value='6'>

i'm trying to get this result for my formhandler:

name=1,2,3&user=4,5,6

what's the best way doing this using jQuery? thanks