[Javascript] Is this form control by Javascript

[forweb at comcast.net (tee)]

Hi I need to do an online order form like this one that is able to do
calculations upon submission, and when I received it, I will know the total
price of the order.

http://www.melsmarket.com/cgi-bin/orderonline.cgi

Is there a script available or company that does some script. I am on tight
budget so prefer free script but if it's not possible, I'll have to pay for
it I guess.

Thanks!

Tee