<p>When I turn an image (<code>&lt;img&gt;</code>) into a hyperlink (by wrapping it in <code>&lt;a&gt;</code>), Firefox adds a black border around the image.  Safari does not display the same border. </p>

<p>What CSS declaration would be best to eliminate the border?</p>

```
```
a img {
    border-width: 0;
}
```
```