Help processing a form & web hosting

I am soon going to be making a small website for my mum's workplace: A doctor's surgery.

There will be a service that allows people to order repeat prescriptions via the site. The user will fill out the form with details & drugs to be ordered, and will submit the form. I presume that the details submitted will then be forwarded somehow (an email) to the surgery for the doctor to make the prescription.

I've never had to make a page with a form on before, and although I know how to make a form, it's the processing of the data when it's submitted I'm new to. What language to process the form in? php asp??

So, should I do the site in php or asp or what??

Also, depending on that answer, I also need a host and domain name setting up. It's the first site I've done where it's not using some crappy free webspace, and I haven't a clue how to get it sorted.

Could the S-M writers & hosts help me here (you use sarcnet right)??

Of course the surgery is willing to pay money for hosting etc, so that's not a problem.

I know it's a lot to ask but can anyone help me please??

~Cyrix