Jquery : Mengirim paramter ke file php tanpa url

pastikan file jquery.js sudah ada


echo "

data akan tampil disini secara otomatis tanpa load halaman

";
?>

di bawah ini script di file tampil.js

================== start =====================

var nip="";

$(document).ready(function() {

    nip = $("#nip").val();
    selesai();
});

function selesai() {
    setTimeout(function() {
        update();
        selesai();
    }, 200);
}

function update() {

    $.getJSON("tampil.php", {nip:nip} ,function(data) {

        $("ul").empty();
        $.each(data.result, function() {
            $("ul").append("Pilih Kompetensi("+this['total']+")");
        });
    });
}

=================== end =====================

di bawah ini script di file tampil.php

=================== start ====================

include("$DOCUMENT_ROOT/koneksi.php");

$sql = "SELECT count(*) as total FROM table_siswa WHERE nip='$nip'";
$rs = $f->get_last_record($sql);
$total = $rs['total'];

$result = array();

array_push($result, array('total' => $total));

echo json_encode(array("result" => $result));
?>

=================== end====================