var cal_event_id = 0;

function add_cal_event() {
    cal_event_id++;
    var _cal_events = document.getElementById('cal_events');
    _cal_new_event = document.getElementById("cal_new_event");
    var newdiv = document.createElement('div');
    eventId = "cal_event"+cal_event_id;
    newdiv.setAttribute('id',eventId);
    newdiv.innerHTML = _cal_new_event.innerHTML;
    _cal_events.appendChild(newdiv);
}