Create Dynamic checkboxes by iterating JSONArray in DOJO

I am new to DOJO and I am using DOJO 1.5.0 version.

I want to create dynamic checkboxes by iterating JSONArray in DOJO. This dynamic creation will be done on a particular event like when we selecting some combo-box value.

For example consider below JSONArray:

var tempJSONArray = [{role_id = '1', role_name = 'role1'},{role_id = '2', role_name = 'role2'},{role_id = '3', role_name = 'role3'}]

I want display checkboxes corresponding to Role Name. Lable for checkbox will be role_name and value will be role_id from JSON object. Also I want to add 'onChange' event to check-boxes, as on this event I want to do a Ajax call to server with role_ids.

Thank you for reading and also please let me know if further clarification is needed.