Email Form for Website (multiple recipients)

I am trying to create a email contact form for our website. I want there to be four fields for a visitor to fill in (name, email address, subject, message). The subject field will be a drop-down box to allow for a variety of purposes for the visitor's message. I know how to do all of this and have the message sent to one address. However, I would like to associate each subject choice to a different email address. I've looked all over the Internet and can't seem to come across with a way to do this. Is there anyone out there that knows how to do this with either PHP, CGI, or JavaScript?

re: Email Form for Website (multiple recipients)

you could use a switch to select the appropriate email address by the subject. like
alternatively, if you submit the subject by number you can also do
(to name only some possibilities)

regards