function single(){
if (document.selectTimetable.trip[1].checked == true)
	{
document.selectTimetable.Inbound_route.disabled=true
document.selectTimetable.Inbound_month.disabled=true
document.selectTimetable.Inbound_Year.disabled=true
		}
else if (document.selectTimetable.trip[0].checked == true){
document.selectTimetable.Inbound_route.disabled=false
document.selectTimetable.Inbound_month.disabled=false
document.selectTimetable.Inbound_Year.disabled=false
	}
}