Editor stripping out script email for spam protection, though was fine earlier

The script I use for email spam protection was working fine and you can see it here: http://dmuuc.org/contactus/ for web[at]dmuuc.org but I try to use the same script on this page and it gets stripped every time: http://dmuuc.org/concerts-coming-honor-grace-griffith-blues-concert-open-mic/

I may give up and use a different method, but I’d like to know if there’s anything I can do to keep it from stripping it out.