>I guess I should admit defeat here (although I may ask my colleague for help).
>
>I've added a hidden input and I've changed the code to be
>
>

>var form = document.getElementById('frmAddItem');	  
>	  
>	  document.getElementById('txtFake').value = 'btnRemoveOverdue';
>	  //form.action = form.action + '?btnRemoveOverdue=Remove+Overdue'  ;
>	  form.submit();

>
>but the passed string now contains an empty txtFake. May be I need to set its text instead of value?
>
>UPDATE. Tried some other things but looks like C++ is not recognizing programmatic changes in DOM. I found a different solution.

There is a lot of customizations in the way this form is being submitted.