Rustour error message

[Bubris]

When adding a rustour without a year the error message isn't displayed untill you navigate away from the page.

[Pilen]

This bug only occurs in firefox, not chromium.
It probably has something to do with the fact that we send the user back with the html.back() function, which uses javascript to go back to the form.
In chromium it must make a query to the page or something, which firefox dosn't.

This bug probably exists everywhere we use the html.back() function and flash together