Here's a very early version of a solution to a problem where you have an
input box want to give the user the option to expand the box to a
if they want to enter more stuff such as multiple line content. Your implementation, when you attempt the same thing, might be differently but feel free to copy this as a good start for your own projects. The demo show how it works.
textarea or the other way around.
Feedback welcomed. Bare in mind that this was a quick first attempt and that I haven't tested this on IE.