I am building a contact page for my web site and I was wondering if anyone knew how to do something... Here's the gist of what I want:

I want a spot for the visitor to enter their phone number into my form, but I want it to automatically format the number they type like: (XXX) XXX-XXXX

So if they type 5551234567 into the input box, I want it to show up (555) 123-4567 in the box as they type.

Does that make sense?

You may use jQuery for this purposes - http://jquery.com/ -it's quite simple plus there are a lot of tutorials on this website.