jQuery.js

$.ajax({
  type: "POST",
  url: "some.php",
  data: "name=John&location=Boston"
}).done(function( msg ) {
  alert( "Data Saved: " + msg );
});

post.js

$.post("some.php", "name=John&location=Boston", function( msg ) {
  alert( "Data Saved: " + msg );
});

xhr.js

var xhr = new XMLHttpRequest();
xhr.addEventListener("done", function ( msg ) {
  alert( "Data Saved: " + msg );
});
xhr.open("POST", "some.php");
xhr.send("name=John&location=Boston");