Java Script Writer for small project

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
I need someone who can write me some Java Script code to add to my website's shopping cart. I need the code to make it possible for me to give the customer a percentage discount for increasing dollar values of whatever he is buying. For example, if his shopping cart adds up to $50, I might give him a 10% discount. If it adds up to $100, I might give him a 20% discount, etc. Will pay fee to anyone who can produce this script for me and of course, provided the script actually works. I have a bona fide website and business. The website is already online. It just needs this detail. Thank you.

Skills required:
PHP, Software Architecture
About the employer:
Public Clarification Board
Bids are hidden by the project creator. Log in as the employer to view bids or to bid on this project.
You will not be able to bid on this project if you are not qualified in one of the job categories. To see your qualifications click here.