This PHP script protects your email address from malicious site crawling spam robots.
This script uses many methods of protection. The most obvious is the use of a CAPTCHA that expires every 3 min to prevent brute force attacks.
There are some hidden features as well. There are two CSS hidden form fields. An 'email' field and a 'url' field are masked using an external CSS style sheet. If an automated robot submits information to theses fields the query is ignored.
This is extremely unlikely, but if a robot somehow managed to get past the CAPTCHA and not fall for the CSS trap, the end email address is displayed using JavaScript. Most bots look for the standard user@domain.com, they normally are not smart enough to 'decode' JavaScript.
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