Reloading ContentEditable area when visitor clicks on back button

[Jason]

I'm building a rich editor to replace a textarea, and am about to
release it as "live." But there's one last thing I want to do with it.

When using a textarea, if the visitor clicks on "back" then the
information is (usually) still there. But with the contenteditable
field, it's gone.

I read on a web page a few days ago that there was an easy solution to
this, but I didn't save the information and didn't save the page. Any
ideas?

TIA,

Jason