javascript save

//fun simpan
function save()
{
    $('#btnSave').text('saving...'); //change button text
    $('#btnSave').attr('disabled',true); //set button disable
    var url;

    if(save_method == 'add') {
        url = "<?php echo site_url('admin/soal_ganda/tambah/'.$this->uri->segment(4))?>";
    } else {
        url = "<?php echo site_url('admin/soal_ganda/update/'.$this->uri->segment(4))?>";
    }



    // ajax adding data to database
    var formData = new FormData($('#form')[0]);
    $.ajax({
        url : url,
        type: "POST",
        data: formData,
        contentType: false,
        processData: false,
        dataType: "JSON",
        success: function(data)
        {
            if(data.status) //if success close modal and reload ajax table
            {
                $('#modal_form').modal('hide');
                reload_table();
            } else
            {
                for (var i = 0; i < data.inputerror.length; i++)
                {
                    $('[name="'+data.inputerror[i]+'"]').parent().parent().addClass('has-error'); //select parent twice to select div form-group class and add has-error class
                    $('[name="'+data.inputerror[i]+'"]').next().text(data.error_string[i]); //select span help-block class set text error string
                }
            }
            $('#btnSave').text('save'); //change button text
            $('#btnSave').attr('disabled',false); //set button enable
        },
        error: function (jqXHR, textStatus, errorThrown)
        {
            alert('Error adding / update data');
            $('#btnSave').text('save'); //change button text
            $('#btnSave').attr('disabled',false); //set button enable
        }
    });
}