Cross-Domain Ajax call using JQuery and JSONP

JSONPXDomain.js

$.ajax({
url:'http://your/url?callback=?',
data:{ apikey: 'secret-key-or-any-other-parameter-in-json-format' },
dataType:'jsonp',
crossDomain: 'true',
success:function (data) {alert(data.first_name);}
});