EAHide Pro is a kind of software which is used for anti-spam on the web. The system makes the e-mail address shown as hidden messages in the web codes by encoding the e-mail address on the appointed webs. While it is being browsed, the e-mail address, which can't be found out by the address searching systems, can decode automatically. In this way, the widely-sent spam can be prevented effectively. EAHide Pro can be used for personal computers (the one who need to leave his e-mail address on the message board or webs), for the web designers, and for the web management and protection.