passing form value (ID) to an other page

Hi all

i have a form as follows:

** file1.php**

    <form action="<?php echo $editFormAction; ?>" method="POST" enctype="multipart/form-data" name="tblMovment" id="tblMovment">

        <input name="MovDate" type="text" />

        <input name="MovAmount" type="text" />
        <input type="submit"  name="submit" id="submit" value="add invoice"  />
        </form>

1. **I want to pass the Auto increment ID of the table above to another page (attach.php)
   then i can use it $_POST['ID'] to attach a file to the above "Invoice" ? **

2. Is there any way to attach the files in the same form (I have two separated mySql Table one for Files(that ATTACHED to Invoices table) an the other for Invoices)??