The css below crashes safari.

It has no effect on IE Mac.

Works correctly in Opera 7.51 Mac.

Firefox 1 doesn’t allow positioning of generated content and so does not display correctly but at least it doesn’t crash.

This link demonstrates the effect Test.

This span demonstrates the effect.

Haven’t tested it on windows but as ie doesn’t do generated content I don’t expect it to have any effect.

    a
                {
                    position: relative;
                    display: inline-block;
                    width: auto;
                   
                }


    a:hover:after
                {
                   content: attr(href);
                   position: absolute;
                   display: block;
                }