If you want you highlightName Action to render a partial, you need to
omit your redirect statement. Each action can only have one redirect
or render statement. If you omit the redirect statement, the
controller will look for an rhtml, rjs or rxml document in the folder
associated with your controller.
In your case it would be app/views/test/highlight_name.rhtml
Put whatever rjs logic you want in there, and rails will take care of the rest.
Hope that helps