function check (form) {
	if (form.name.value== ""){
		alert ('name is empty');
		return false;
	}
	else if (form.email.value== ""){
		alert ('email is empty');
		return false;
	}
	
	else if (form.phone.value== ""){
		alert ('phone is empty');
		return false;
	}
	
	else if (form.address.value== ""){
		alert ('address is empty');
		return false;
	}

	else if (form.postcode.value== ""){
		alert ('postcode is empty');
		return false;
	}

	else if (form.appointment.value== ""){
		alert ('appointment is empty');
		return false;
		
	}
	else 
		return true;

}