public string getAvailableTrucks(string chosenDate)
{
DateTime selecetdDate = DateTime.ParseExact(chosenDate, "dd/MM/yyyy", null);
JavaScriptSerializer j = new JavaScriptSerializer();
Trucks t = new Trucks();
List <Trucks> trucksList = t.getAvailableTrucksList(selecetdDate);
return(j.Serialize(trucksList));
}