The site has to support JSONP. If it doesn't, you can't use
JSONP.
jQuery 1.5 is way obsolete, BTW. Dinosaurs roamed the earth when
1.5 was created.
The latest is 1.11.3. Don't try learning with a version that
NOBODY uses.
If the site doesn't support JSONP and doesn't allow
cross-domain requests, you have to do the job on your server instead
of with jQuery.