Checking boxes in form using Javascript

Hi,

I have a form protocol with Javascript designed to automatically check a few checkboxes once a specific radio option is selected.  However, if the checkbox has been selected by javascript, the changes aren't reflected on the work protocol.  I included an example protocol of what I've been trying.

It looks like additional scripting is being executed from within formHelper_7_0.js when a checkbox is clicked, but these functions aren't being called when using javascript.  Is there a way to check/uncheck an option using Javascript while still calling the necessary functions to have the results reflect the changes?

Thanks,

Eric