// Initialize Filters
if ( !IsPostBack ) {
    //InitializeDisciplineCheckboxes(true);
    //InitializeClassDaysCheckboxes(true);
    //InitializeClassTimesCheckboxes(true);
} else {
    //InitializeDisciplineCheckboxes(false);
    //InitializeClassDaysCheckboxes(true);
    //InitializeClassTimesCheckboxes(true);
}