for each  rec in Calibration_Master[ID != null]
{
	calhist = Calibration_History[Calibration_Master_ID == rec.ID];
	if(calhist.Cal_Due_Date < zoho.currentdate && calhist.Status != "Completed")
	{
		calhist.Status="Overdue";
	}
	if(calhist.Cal_Due_Date >= zoho.currentdate && calhist.Status != "Completed")
	{
		calhist.Status="Due";
	}
	if(rec.Cal_Due_Date < zoho.currentdate)
	{
		rec.Status="Overdue";
	}
	if(rec.Cal_Due_Date >= zoho.currentdate)
	{
		rec.Status="Due";
	}
}