Hi!

Can you explain me why my code changes doesn't work?
1) I have module 'sales' (or whatever) provided by odoo and I want to add CONFIRMATION WINDOW 'Are you sure' when user want to go to the next state.
What I did:

      button name="action_set_won_rainbowman" string="Finished"                            type="object" class="oe_highlight" data-hotkey="w" title="Mark as finished"                            invisible="not active or probability == 100 or type == 'lead'" confirm="Are you sure?"                                                                                                                 

It seems simple, I just have to add option 'confirm="Are you sure?" to button, but it doesn't work. Seems like it is not the the correct form, but it is! I checked via developer mode.

2) Also I want to change permissions that user shouldn't change the state to previous one (only forward)

Please help me to do it or advise me how to.

Thanks!