How to spamproof a mailto link?

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JavaScript remains one of the best mailto obfuscator. For users with JavaScript disabled you may want to substitute the mailto link with a link to a contact form.

The following is a popular JavaScript anti spam email obfuscator:

There is also a php version of the above to be able to generate obfuscated emails from the server side.

This is the JavaScript code that the above tool would generate to obfuscate my email address (comments intact):

<script type="text/javascript" language="javascript">
<!--
// Email obfuscator script 2.1 by Tim Williams, University of Arizona
// Random encryption key feature by Andrew Moulden, Site Engineering Ltd
// This code is freeware provided these four comment lines remain intact
// A wizard to generate this code is at http://www.jottings.com/obfuscator/
{ coded = "lMnK@wMunFK8MDDMKKt.ktl"
  key = "1DtzZ8TGBuhRjJMKWI4gkUF2qidfOyPmSN7X30Vpso6xvErLnwQCbalA95HcYe"
  shift=coded.length
  link=""
  for (i=0; i<coded.length; i++) {
    if (key.indexOf(coded.charAt(i))==-1) {
      ltr = coded.charAt(i)
      link += (ltr)
    }
    else {     
      ltr = (key.indexOf(coded.charAt(i))-shift+key.length) % key.length
      link += (key.charAt(ltr))
    }
  }
  document.write("<a href="https://stackoverflow.com/questions/3624667/mailto:"+link+"">Email Me</a>")
}
//-->
</script><noscript><a href="contact-form.html">Email Me</a></noscript>

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