function checkEmail(mf)
{
	if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(mf.txtMail.value))
	{
		return (true);
	}
	alert("Please enter your valid email address.");
	return (false);
}
function checkCarReservation(mf)
{
	if(mf.txtName.value=="")
	{
		alert("Please enter your name");
		mf.txtName.focus();
		return false;
	}
	if(mf.S_country.value==0)
	{
		alert("Please select Country");
		mf.S_country.focus();
		return false;
	}
	if(mf.required_car_city.value=="")
	{
		alert("Please enter your city");
		mf.required_car_city.focus();
		return false;
	}	
	if(mf.txtMail.value=="")
	{
		alert('Please enter your email address');
		mf.txtMail.focus();
		return false;
	}	
	if(checkEmail(mf)==false)
	{
		mf.txtMail.focus();
		return false;
	}	
	if(mf.security_code.value=="")
	{
		alert('Please enter security code');
		mf.security_code.focus();
		return false;
	}
	return true;
}