Using below jQuery methods, you can make ajax calls.
1-load() : Load a piece of html into a container DOM
2-$.getJSON(): Load JSON with GET method.
3-$.getScript(): Load a JavaScript file.
4- $.get(): Use to make a GET call and play extensively with the response.
5- $.post(): Use to make a POST call and don't want to load the response to some container DOM.
6- $.ajax(): Use this to do something on XHR failures, or to specify ajax options (e.g. cache: true) on the fly.