Cari Data Ajax

function search() {
    $.ajax({
        type: "POST",
        url: "<?php echo site_url('operator/rtlh/checkdata'); ?>",
        data: {
                nik : $("#nik").val()
        },
        dataType: "json",
        beforeSend: function(e) {
            if(e && e.overrideMimeType) {
                e.overrideMimeType("application/json;charset=UTF-8");
            }
        },
        success: function(response) {
            $("#loading").hide();
            if(response.status == "success") {
                // Ambil Nilai
            } else {
                // Kasih Pesan Error
            }
        },
        error: function (xhr, ajaxOptions, thrownError) {
            alert(xhr.responseText);
        }
    });
}