How to do image rollovers in HTML email.
A while back I was asked to do an HTML email with an active state rollover image. At first I thought it was impossible, since we all know it’s impossible. You can’t embed Flash movies or videos in HTML email, right? (although you can attach them, of course).
I discovered a technique to embed image rollovers in HTML emails by using a mix of old school and new school technologies. Since JavaScript in email clients is disabled (at least all desktop and decent web versions like Gmail), that is out of the question.