function sprawdzBooking(frm)
	{
  		var reg1 = /(@.*@)|(\.\.)|(@\.)|(\.@)|(^\.)/; // not valid
  		var reg2 = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,3}|[0-9]{1,3})(\]?)$/; // valid
		dzisiaj = new Date(); 
		var data = document.frm.sel_Day.value+'-'+(document.frm.sel_Month.value-1)+'-'+document.frm.sel_Year.value;
		var data_dzisiejsza = dzisiaj.getDate()+'-'+dzisiaj.getMonth()+'-'+dzisiaj.getYear();


		/*if(data < data_dzisiejsza)
		{
			alert("Please select correct date.");
			frm.sel_Year.focus();
			return false;
		}*/


		if(frm.name.value == "")
		{
			alert("Please enter your name.");
			frm.name.focus();
			return false;
		}


  		if (!reg1.test(frm.email.value) && reg2.test(frm.email.value)) 
		{
			frm.email.focus();
  		}
		else
		{
    		alert("Email address is required.");
			frm.email.focus();
			return false;
		}

		if(frm.email.value != frm.email_1.value)
		{
    		alert("Please enter valid email address.");
			frm.email_1.focus();
			return false;
		}
/*
		if(frm.wycieczka.value == '')
		{
			alert("Please select type of service.");
			frm.wycieczka.focus();
			return false;
		}



		if(frm.wycieczka.value == 'Airport  Transfer + Aushwitz & Saltmine Tour 10% off' || frm.wycieczka.value == 'Krakow Airport Transfer' || frm.wycieczka.value == 'Katowice Airport Transfer' || frm.wycieczka.value == 'Zakopane Transfer' || frm.wycieczka.value == 'ski shuttle Katowice - Zakopane' || frm.wycieczka.value == 'ski shuttle Krakow - Zakopane')
		{

			if(frm.flight_number.value == '')
			{
				alert("Please enter Your flight number.");
				frm.flight_number.focus();
				return false;
			}

			if(frm.hotel_name_air.value == '')
			{
				alert("Please enter Your hotel name / Pick up address.");
				frm.hotel_name_air.focus();
				return false;
			}

			if(frm.flight_arival.value == '')
			{
				alert("Please enter Your flight arrival time.");
				frm.flight_arival.focus();
				return false;
			}

			if(frm.return_transfer.checked)
			{
				if(frm.returnmonth.value == '' || frm.returnday.value == '' )
				{
					alert("Please select return date.");
					frm.returnday.focus();
					return false;
				}
			}

		}
		else
		{
			if(frm.hotel_name_travel.value == '')
			{
				alert("Please enter Your hotel name / Pick up address.");
				frm.hotel_name_travel.focus();
				return false;
			}	
		}
		*/

		if(frm.selmonth.value == '' || frm.selday.value == '' )
		{
			alert("Please select the month, day and year of your arrival.");
			frm.selday.focus();
			return false;
		}

		if(frm.telephone.value == "")
		{
			alert("Please enter your mobile phone.");
			frm.telephone.focus();
			return false;
		}

		return true;
	}

	
	function returnTransfer(frm)
	{
		var frm = document.frm;
			if(frm.return_transfer.checked)
			{
				document.getElementById('airport_fields_return').style.display = 'block';
			}
			else
			{
				document.getElementById('airport_fields_return').style.display = 'none';
			}
	}
	
	
	function sprawdzKontakt(frm)
	{
  		var reg1 = /(@.*@)|(\.\.)|(@\.)|(\.@)|(^\.)/; // not valid
  		var reg2 = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,3}|[0-9]{1,3})(\]?)$/; // valid

		if(frm.kontakt_name.value == "")
		{
			alert("Please enter your name.");
			frm.kontakt_name.focus();
			return false;
		}


  		if (!reg1.test(frm.kontakt_email.value) && reg2.test(frm.kontakt_email.value)) 
		{
			frm.kontakt_email.focus();
  		}
		else
		{
    		alert("Email address is required.");
			frm.kontakt_email.focus();
			return false;
		}


		if(frm.kontakt_content.value == '')
		{
			alert("Please enter your message.");
			frm.kontakt_content.focus();
			return false;
		}


		return true;
	}