hiding message box with a click

I don't know if someone will like this or not, but I do :-)
I actually added a -> onclick="this.style.display = 'none'" <- to all div with id=error and id=success

I removed this from 0.8.6 although it was present in 0.8.5.

The reasons behind it:

1) display: none does not work on screen readers, add another left: -999em.
2) javascript should be unobtrusive, i.e. added when the page loads
3) the end user has no visual clue this is possible (add a cross?)

I have no problems adding this kind of behaviour but I don't understand what the added value is of removing the message. The only reason I can think of is getting more screen room.