PHPLIB cart with back/forward buttons

Hi, I've built a shopping cart using PHPLIB. When using the BACK or FORWARD buttons in IE, argument values are passed to the new page, inappropriately updating the information. Ack! This does not appear to be an issue with most versions of netscape. When called with the BACK or FORWARD button is there any way to 1. force the expiration of the page (not perfectly desirable) or 2. pass the URL link only (without the attached argument string) the example can be viewed at www.yoursound.com Thanks! Dan Troxell, x494 =================================== Dir. of Information Technology Citizens Energy Corp. 530 Atlantic Ave, 5FL Boston, MA 02210 ===================================