68874 PHP Script Development w/java?

I have another project that I'd like a quote on. Depending on the price it may be a bit before I can afford to build it, but I thought I'd run it by you anyway. There's a JavaScript program that's called "Dynamic Price Generator" It makes it so the price of an item goes up until a set date. You can see an example at the link below... [login to view URL] Anyhow that's a starting point of for you to get an idea of what I want. This script is flawed and limited in many ways. For one it has a security hole (you can look and see where paypal will send you after the purchase, so it doesn't work for automatically sending people to your download page.) Let's see if I can explain what I want instead. First I want a java script or something that will show a price that's continues to go up (like the link above). However, when someone clicks on order through that link, I want it to send them to a php file that takes that price and rounds it to the nearest penny and sends it along with the rest of the data to PayPal. I want an admin script that will allow me to setup as many of these offers as I want, and it would keep them in a flatfile database (I don't imagine anyone would use many, so it should be fine in a flatfile). The admin script would need to give people the html code to copy and paste into the location. I uploaded a file with an example of a paypal button, incase you're not sure what all the fields are for that. I want the JavaScript or however we make the price increase, setup so it can start in one of two different ways. It can start at a certain day and end on another day It can start and load a cookie when the visitor first loads the page (this way each visitor would start out with the same low price) I would also like the script to be able to go in another direction. Instead of the price increasing second by second, it would keep track of how many items have been sold and after a certain amount, raise the price. And I would want to display that information on the sales page (x number of products left at this price). I hope that makes sense. I have it all in my head, but putting it on paper so that people understand it, is a whole different thing. One other thing, I would need to own exclusive rights to this script, just as if I'd written it. I would be happy to refer people to you for installing, and making edits to the script though.