Restarting scripts in Opera after you stopped them

Opera has a nice feature, whereby each message box created from a Javascript offers you an option to stop running scripts for the given page. This is very nice if you are using alerts to debug your script and you've just realized that you have created an infinite loop by mistake :-D.
However, once you've corrected the mistake, you might want to test it again ;-). Reloading the page doesn't work, you will have to close the page and get bit back from the trash.

Or, from they keyboard do:

Ctrl+W (to close the current tab)
Ctrl+Shift+T (to reopen the last closed tab)