Fully fixes #9 for jQuery v1.4.2+

One eval for v1.6+,  one eval for prior to v1.6. Both must be true for
anchor link  to contain a target attribute.

if ($(this).attr('target') !== undefined && $(this).attr('target') !==
'' ){}
Updated test script

.rar no longer tracked as a downloaded file extensions.

Different versions of jQuery need to be explicitly tested.