Objuscate output of CCK field?

Hi,

I want to create a computed CCK field that will "build" a Paypal button on the fly from the other field inputs (price, page to redirect to, etc.). However, I don't want this code to be easily viewable on the source... I know it can't be super secure, but I only need a moderate level of security.

I know that some modules/scripts use JS to obfuscate emails... any idea if a similar source could be used in this case? Any pointers or resources to help?

Thanks!
Ron