Update checkbox with nothing?

I have a form where users can send info to me and I have 4 checkbox arrays with 5 - 8 checkboxes each.

When somebody fill out the form and submit it, it saves to a table in the database. And so far it works like a charm. I have this form connected thur ChronoConnectivity and let users view what they have sent to me.

Now to my problem. When a user "opens" his/hers post it shows up in the same form as before. ckeckboxes are filled as they where entered to start with. But i the user uncheck all checkboxes it will not be saved to database. There are no problem with unchecking all but one.

I have search thru this forum and understand that when submitting a changed form no update to empty fields will be done. And I have seen a fix for this by making a field_array and merge it to Post. But I can NOT figure out how to do that.

Can anyone please help me out?

Hi Jelu,

Please post the OnSubmit code that you've tried.

Bob

Thank you for quick respons.

That is the problem. I don´t know where to start. ChronoForm and ChronoConnectivity has done the most for me so far. And my skills in this are not good enough.

This is a script I found here.

<?php
$check1 =& JRequest::getString('check1', '', 'post');
JRequest::setVar('check1', $check1);
?>

This does not work. I have put it in tab "Form Code" and under "On Submit code - before sending email"

Jerker