diff --git a/schedule.js b/schedule.js
index b0b527f..8f53581 100644
--- a/schedule.js
+++ b/schedule.js
@@ -47,11 +47,11 @@ function to_json(page) {
       schedule_data[day][hour] = {teacher: [], chamber: [], course: [], changed: []};
       for (special_hour = 0; special_hour < amount_of_special_hours; special_hour++) {
          var selected_hour = schedule.find('table').eq(day).find('tr').eq(special_hour).find('td');
-
+         //Give the value of the schedule hour to the fitting array.
          schedule_data[day][hour].teacher[special_hour] = selected_hour.eq(0).html();
          schedule_data[day][hour].chamber[special_hour] = selected_hour.eq(2).html();
-         schedule_data[day][hour].course[special_hour] = selected_hour.eq(4).html();
-
+         schedule_data[day][hour].course[special_hour] = selected_hour.eq(4).html( );
+         //Check if the hour is 'changed' by the schedule authors, if so set to true.
          schedule_data[day][hour].changed[special_hour] = selected_hour.eq(0).attr().class == 'tableCellNew' ? true : false;
       }
     }