public void selectPreviousRow() {
		int rowCount = activityListModel.getRowCount();
		
		if (previousRow >= 0 && rowCount > 0) {
			if (rowCount > previousRow) {
				tblActivities.getSelectionModel().setSelectionInterval(previousRow, previousRow);
			} else if (rowCount == previousRow) {
				tblActivities.getSelectionModel().setSelectionInterval(previousRow - 1, previousRow - 1);	
			} else {
				int row = rowCount - 1;
				tblActivities.getSelectionModel().setSelectionInterval(row, row);
			} 
				
		}
	}