问如何从XML加载FullCalendar中的事件？

EN

events: function(start, end, callback) {
    $.ajax({
      url: '/contracts/'+contract_id+'.xml',
      dataType: 'xml',              
      data: {
        // our hypothetical feed requires UNIX timestamps
        start: Math.round(start.getTime() / 1000),
        end: Math.round(end.getTime() / 1000)
      },

      success: function(doc) {
        var events = [];
        $(doc).find('contract').each(function() {
          events.push({
            title: $(this).attr('week-mon-hours'),
            start: $(this).attr('week-mon-hours') // will be parsed
          });
        });
        callback(events);
      }
    });
  },