I’ve found a very strange thing.
I was complaining about it before, but nobody sees old questions here.
It works perfectly in Opera only… In Firefox, Chorme, Safari and IE8 there’s a border around this button… And I have no idea WHY? How to delete the border?
Thanks.
As others have noted, you have defined an “image”-style button but not provided a source URL, resulting in a broken image.
The simplest solution is to change
type="image"totype="button", which removes the broken image icon and border.