If you put onpageshow="if (event.persisted) onPageShow(); in the <body> tag and put this function in the page header:
function onPageShow() {
document.form1.ButtonNameHere.disabled = false; }
The button is (re)enabled when you press the back button in FF. However the form you previously completed is lost. I guess it is better to start again with a blank form than not to be able to press "submit" at all. When using FF you lose both ways! <
::sigh:: Finally got a chance to try it with FF at home and found the same thing. If you refresh the page everything works fine. I didn't lose the text I had attempted to post when I refreshed, but its probably a good idea to copy it just in case...
reviving an old topic here... but for the interest of the community, in FF3b5 pressing refresh no longer even enables the submit button.