http://www.dynamicdrive.com/emailriddler/
An e-mail id listed on a web page has a fair chance of reaching a spammer's hand. However, if the e-mail address can be accommodated in an encrypted form, no spammer will be able to grab it. In this context, the simple on-line application `e-mail riddler' (http://www.dynamicdrive.com/emailriddler/) will come very handy. For an e-mail address, the service offers a short JavaScript program for encrypting it. Paste this code on to your web page, where you want your e-mail address to be displayed.