popup after clicking create thread

On selected forums, have a popup box display after the member clicks "Create Thread"

is there a way to hook into the create thread button via JS events to make it show a popup first once they click confirm button within the popup for it to actually post the thread?

thank you.
thats not what was asked. we need to show a popup modal window with a message after the user clicks create thread in the thread create page. not adding create thread buttons across other parts of the site.