function ChangeDate() {
	
	var reservationForm = document.forms.frmReservation;
	selectedDay = reservationForm.tt.options[reservationForm.tt.selectedIndex].text;
	selectedMonth = reservationForm.mm.options[reservationForm.mm.selectedIndex].text;
	selectedYear = reservationForm.jj.options[reservationForm.jj.selectedIndex].text;
	if (checkDateValues(selectedDay, selectedMonth, selectedYear)) {
		
		var myDate=new Date();
		myDate.setFullYear(selectedYear,selectedMonth-1,selectedDay);
		myDate.setDate(myDate.getDate()+1);
		var i = 0;
		
		for (i = 0; i < reservationForm.tt1.length; ++i) {
			if (reservationForm.tt1.options[i].text.toString() == (myDate.getDate()).toString()) {
					reservationForm.tt1.options[i].selected = true;
					break;
			}
		}
		
		for (i = 0; i < reservationForm.mm1.length; ++i) {
			if (reservationForm.mm1.options[i].text.toString() == (myDate.getMonth()+1).toString()) {
					reservationForm.mm1.options[i].selected = true;
					break;
			}
		}
		
		for (i = 0; i < reservationForm.jj1.length; ++i) {
			if (reservationForm.jj1[i].options.text.toString() == (myDate.getYear()+1900).toString()) {
					reservationForm.jj1[i].options.selected = true;
					break;
			}
		}
		
		
	}
	
}

function checkDateValues(myDay, myMonth, myYear)
{		
	if (myDay<1 || myDay>31) 
	{
		return false;
	}
	if (myMonth<1 || myMonth>12) 
	{
		return false;
	}
	if (myYear.length==2) 
	{	if (myYear<"30") 
		{	myYear="20" + myYear    } 
		else 
		{	myYear="19" + myYear	} 
	}; 
	myYear=parseInt(myYear, 10);
	if (myMonth==4 || myMonth==6 || myMonth==9 || myMonth==11)
	{	if (myDay==31) 
		{	
			return false;
		}
	} 
	if (myMonth==2) 
	{	var Disekto=parseInt(myYear/4,10) 
		if (myDay>29) 
		{	
			return false;
		}
		if (myDay==29 && ((myYear/4)!=Disekto))
		{	
			return false;
		}
	}
	return true;
}