function validate(formular)
{

if ((formular.jmeno.value=="")||((formular.jmeno.value.length<2)))
{
	alert("Fill in your name please!");
	formular.jmeno.focus();
	return false;
}

if ((formular.adresa.value=="")||((formular.adresa.value.length<2)))
{
	alert("Fill in your address please!");
	formular.adresa.focus();
	return false;
}

if ((formular.stat.value=="")||((formular.stat.value.length<2)))
{
	alert("Fill in your country please!");
	formular.stat.focus();
	return false;
}

if ((formular.email.value=="")&&(formular.fax.value==""))
{
	alert("Fill in your e-mail or fax number please!");
	formular.email.focus();
	return false;
}

if ((formular.fax.value!="")&&(formular.fax.value.length<6))
{
	alert("Fill in your fax number correctly (include dial prefix) please!");
	formular.fax.focus();
	return false;
}

if ((formular.email.value!="")&&(window.RegExp))
{
	re = new RegExp("^[^@]+@[^.]+\..+$");
	if (!re.test(formular.email.value))
	{
		alert("This is not correct e-mail address!");
		formular.email.focus();
		return false;
	}
}

if (formular.dat_den.value=="")
{
	alert("Select your check-in date (day) please!");
	formular.dat_den.focus();			
	return false;
}

if (formular.dat_mes.value=="")
{
	alert("Select your check-in date (month) please!");
	formular.dat_mes.focus();
	return false;
}

if (formular.dat_hod.value=="")
{
	alert("Select your approx. check-in hour please!");
	formular.dat_hod.focus();			
	return false;
}

if (formular.dat_odj_den.value=="")
{
	alert("Select your check-out date (day) please!");
	formular.dat_odj_den.focus();
	return false;
}

if (formular.dat_odj_mes.value=="")
{
	alert("Select your check-out date (month) please!");
	formular.dat_odj_mes.focus();
	return false;
}

if (formular.osoby.value=="")
{
	alert("Fill in number of guests please!");
	formular.osoby.focus();
	return false;
}
}