$.ajax({

  method: "POST",

  url: "some.php",

  data: { name: "John", location: "Boston" }

})

  .done(function( msg ) {

    alert( "Data Saved: " + msg );

  });

var xmlDocument = [create xml document];

var xmlRequest = $.ajax({

  url: "page.php",

  processData: false,

  data: xmlDocument

});

xmlRequest.done( handleResponse );

var menuId = $( "ul.nav" ).first().attr( "id" );

var request = $.ajax({

  url: "script.php",

  method: "POST",

  data: { id : menuId },

  dataType: "html"

});

request.done(function( msg ) {

  $( "#log" ).html( msg );

});

request.fail(function( jqXHR, textStatus ) {

  alert( "Request failed: " + textStatus );

});