Auto-capitalize form input

Hi all,

I've been seeing forms popping up here and there that auto-capitalize a user's input.  What I'm trying to get my form to do is capitalize each new word in a form field.  For example, instead of Firstname lastname, I'm going for Firstname Lastname.  I tried the css command text-transform: capitalize, which does the trick, but only on screen.  The capitalized values don't carry over; it's just an on-screen mask.  I also have autocapitalize="on" in each of my text input fields.

Thanks for any help/suggestions!