Adding prices using Javascript

I am relativley new to javascript, I have previously used it only to make simple java applets; but recently I have been trying to lear more about the language.

I have decided to make an online store for my small computer buisness, but I came across a hurdle when designing the computer customisation section. I want customers to be able to see the 'live' total cost of there computer system as they add components to it (using a form). At the moment the form sends the selected data back to me by email and I have to add the prices up and send a reply email to the customer.

This is somewhat impractical and I thought that javascript would be the right solution to add the selected component prices on the webpage.

Can anyone help with the scripting?

What do you mean you have used JavaScript to write Java applets? They are two completely different languages.

Either way, what do you have so far? How is this laid out? You need to be more specific.

It would be but as Peej said, we need more info. It's not a universal script that fits all applications.