Splitting the email field is the easiest solution for the webmaster, but makes it more complicated for the vistor as it is not clickable anymore. I use the JavaScript code and never had a problem with harvesters.
For the webforms I use a "user-friendly" CAPTCHA where the visitor does NOT have to type in anything.
Examples are to be found in the free e-book JavaScript Vitamins: Free JavaScripts, Tutorials, Example Code, Reference, Resources, And Help