Getting page item to resolve in URL

Question

I have a page item which gets the IP of the sending computer. I then need to put this page item into a URL, but for some reason cannot get it to resolve. So I have a button that is set to redirect to:
http://&p2_id/cgi-bin/labelprinter.py?barcode=&P2_BARCODE.
Everything resolves fine except for P2_ID. Do I need to escape something? TIA

Answer 1

Here's one option: create a JavaScript function which will "create" URL for you. In order to do that, create a hidden text item (let's call it P2_URL).
(I hope I don't have typos in here!)
<script language="JavaScript" type="text/javascript">
  function create_url()
     $x('P2_URL').value =
       "http://" + $x('P2_ID').value +
       "/cgi-bin/labelprinter.py?barcode=" +
        $x('P2_BARCODE').value;
     window.open($x('P2_URL').value);
</script>Now, your button: set its action to "Redirect to URL" and URL Target tojavascript:create_url();