Help with FireFox Javascript in Bookmarklet

[visiblepulse]

I need to be able to change the text of the currently selected input box using a bookmarket.
I can do this in Internet Explorer. Can you help figure out how to do it in FireFox?

Here is a test page explaining what's going on.

( http://yellowlamb.com/filltest/ )

If you can figure out the FireFox solution, reply to the post.

[Ultimater]

To work on the textbox, you may need to use setSelectionRange, and selectionStart, selectionEnd on the actual element.

http://www.aplustv.com/public_stuff/bbcodetest.htm

To detect which element fired the event, try using the "onselect" event handler to detect when the user starts selecting text.