PHP Dynamically Created Form with AJAX: No Data Passed?

PHP Dynamically Created Form with AJAX: No Data Passed?

I have some forms whose ID's are dynamically created via PHP by including a variable called "invno" as shown here:

   
    
    
  1. <form name="formEditInvoice<?php echo $invno ?>" id="formEditInvoice<?php echo $invno ?>" method="post" action="javascript: SubmitEditedInvoice(<?php echo $invno ?>);" onsubmit="javascript: return ValidateForm(this);"> 
    2.
As you can see in the "action" attribute, I'm calling this function:

   
    
    
  1.  function SubmitEditedInvoice(invno) {
     $.post('output.php?mode=6&invno=' + invno, $('#formEditInvoice' + invno).serialize(),
     function(output){
     $('#ajaxinvoices').html(output);
     });
    }




    2.
The problem I'm having is that no data is passed to the PHP back end. I have verified that the variable invno is correctly passed to the javascript function, and have tested my .serialize() by using a hard-coded form ID, but I still get no data passed through. 

Can anyone see what's wrong with my code?

TIA