Well, its a good idea but marky do have decryptor now. That is, encrypted codes will be decode.
But heres my idea, why not use this software.
HTML Protector
Though, it is shareware but it have free trial. I think 30 encrypts.
Note: It is best to use this software when you used redirection html code(iframes)
it may be A flash one or not (using redirect and encrypt it will minimize the bytes).
Certainly, this encrypted method scheme code is not like in dondon, convert html to JavaScript in hexadecimal values, which can be easily be decoded.
But this one is tough. You may try it. Enjoy!