Hide email IDs

I run an Old Boys Alumin web site, where names of exstudents are listed along with email IDs.

I am afraid that the same may be used for spamming. Thus is there any script that I can use to hide the email IDS, so that clicking on a name will send the person an email without his email ID being revealed?

Thanks in advance.

Here's one - http://www.rodstreet.com/ArtEffects/Other/spam.htm

Thanks Sharon