Update jsrights.markdown

Made some updates for anchors, as html 5 doesn't use the 'name' attribute anymore. Just id's and those should always be unique. Also, append doesn't work per the original instructions in one of the scenarios, so I updated and introduced the 'attr' method. And then just tweaked a couple other minor things for consistency and/or style. 

Obviously - feel free to edit my edits. :smile: