Protects mailto email links from spam bots - http://andrewmilson.com/2014/how-i-conceal-mailto-email-links-from-spam-bots/

gistfile1.html

<a href="javascript:mailtoManager('example', 'example.com')">Contact</a>

mailto-manager.js

(function(window) {
  var link = document.createElement('a');
  link.target = '_blank';

  window.mailtoManager = function(local, domain) {
    link.href = 'mailto:truck@thebots.com'
      .replace('truck', local)
      .replace('thebots.com', domain);
    link.click();
  }
})(window);