I need a lot of help right here with creating a cart. I'm halfway there...I THINK

[adamcoutlook]

Hello I'm in quite a grind right now I have 6 hours to come up with a final cart or else I'm fired and I think i'm screwed right here. I used Javascript Ajax and PHP to have a dynamically selecting course drop down menu. The client requested it and of course I didn't think about how I was going to implement it. So now I'm at the deadline and I am asking anyone to please help me I have the courses with location and what have you.
That's my database structure and the dropdown is located at. If anyone can please help me and give me atleast the steps to go around implementing one I would do anything!

http://theuglypixel.com/WSLTEST/index.php?classregister

DROP TABLE IF EXISTS `coursesTbl`;

CREATE TABLE `coursesTbl` (
  `courseID` int(30) NOT NULL,
  `courseName` varchar(50) NOT NULL,
  `courseLocation` varchar(50) NOT NULL,
  `courseDate` varchar(50) NOT NULL,
  PRIMARY KEY (`courseID`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;

[bluewalrus]

What isn't working or needs to be done?