in your HREF attribute, try adding a http:// before the URL.
<a href="www.njskateshop.com" target="_blank">www.njskateshop.com</a>
<a href="http://www.njskateshop.com" target="_blank">www.njskateshop.com</a>
Note the new href attribute and the http:// preceding the external site URL.
You must indicate a http:// to dictate that the URL is on an external site, and not residing on your current site. Without the http:// your site thinks those are pages that live on your site and treat it as such.
That will work. I just tested it out on your site.
If you want to link to internal pages ( pages or posts that reside on your current site ) you can do so by just adding the base url of the page or post you are trying to get too. For example
will direct the user to the post or page title with the URL yoursite.com/new-post/.
Hope that helps and explains a bit about external vs internal linking.