[cmd]

$.ajax({
            type: "POST",
            data: { 
                        primer: primer, 
                        id: value, 
                        somevar: somevarvalue 
            },
            url: "/response.php",
............

Пример с оф. доков

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