Making it harder for crawlers to discover email addresses is something that is not hard to do, but it's one of those things that I at least keep redoing just because it's so easy to do. But it should be instantaneous! :) So here's some code, which I've written in different forms over the years, neatly packaged.

What the code does is run a simple substitution cypher on the address, then shows all the code you'd need to include on a page to make it work (using simple CSS/DHTML tricks, making a layer visible). It also lets you include text to put on the links, so that a single Javascript call put anywhere on the page generates the full mailto: link.

By changing the ordering of letters in the key variable, you can change the way it encrypts things for your page. Okay, "encryption" maybe a bit of an overstatement here, but technically... :)

Just for clarity, here's the link again. It's all under an MIT License, so you're free to do with it as you will. Hope this is useful!