in the hidden form that is created on the cart page, create a new hidden form element:
<input type="hidden" name="txtpromocode" value="</php echo(isset($_SESSION["promocode"])?$_SESSION["promocode"]:""); ?>" />
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.