At times, I've found that I've replied to a thread without knowing that it was actually closed (since mods/admins can post in closed threads).
This is just a simple mod which makes the quick reply box red if a thread is locked.
Thanks, Yumi.
Screenshot for Locked Thread Quick Reply Warning: (I think the color depends on the background color from our
.trow_shaded class in our global.css)
Thanks for the screenshot Rateu

Nice idea..
and better to add some variable like "{$closed_message}" inside <textarea> tag (on showthread_quickreply)
And give the admin setting to change those variable.
Maybe add "onclick" command to clear the variables. So, the message gone if we try to typing.
I remember this script exixst on mYBB 1.2 to displaying logo image inside textarea

(04-12-2010 09:16 AM)FBI Wrote: [ -> ]and better to add some variable like "{$closed_message}" inside <textarea> tag (on showthread_quickreply)
And give the admin setting to change those variable.
Maybe add "onclick" command to clear the variables. So, the message gone if we try to typing.
I remember this script exixst on mYBB 1.2 to displaying logo image inside textarea 
The problem with that is that there's no easy Javascript-disabled fallback.
This is meant to be a quick, non-disruptive hint, not really a fully fledged reminder of sorts.
Thanks for the suggestion nonetheless.