Here is the order form I'm currently working on - [url removed, login to view]
All I need is a COUPON CODE field at the bottom where someone can add a code and, if it is the right code(s), give them a discount (PERCENT OFF and/or DOLLAR AMOUNT OFF).
It would also be nice if a TOTAL could show up at the bottom. Then, after the code has been entered (if one has been entered at all), it would be even nicer if a REVISED TOTAL could appear (reflecting the new total after the discount).
If the transactions php script is needed, you can find it here - [url removed, login to view]
Please let me know if you have any questions or concerns.