public ActionResult DeleteRaceintermediate(int checkpointid, int checkpointOrderId)
{
var timeStartnumberModel = (TimeStartnumberModel)Session["TimeStartnumber"];
timeStartnumberModel.DeleteRaceintermediate(checkpointid, checkpointOrderId);
Session["TimeStartnumber"] = timeStartnumberModel;
TimeMergerModel.Merge(checkpointid);
return Content(timeStartnumberModel.CheckpointIntermediates[timeStartnumberModel.CurrentCheckpointId].ToListboxvalues());
}