serverSync

var $notes = $('<textarea />').text(topic.notes)
    .serverSync({
        url: '/topic/set-notes/' + topic.id,
        field_name: 'notes',
        timeout: 10000
    });

$student_form.find('textarea')
    .serverSync({
        url: '/student/set-topic-notes',
        data: { student_id: student.id, topic_id: topic.id },
        field_name: 'notes',
        timeout: 10000
    });