function confirmDetails(joinmail) {
if (joinmail.firstname.value == ''){
	alert('Please enter your first name.');
	joinmail.firstname.focus();
	return(false);
}
if (joinmail.lastname.value == ''){
	alert('Please enter your last name.');
	joinmail.lastname.focus();
	return(false);
}
if (joinmail.emailaddress.value == '') {
	alert('Please enter your email address.');
	joinmail.emailaddress.focus();
	return(false);
}
if (joinmail.subscribe.checked) {
	if (joinmail.listype.value == 'Both') {
		if (joinmail.address1.value == ''){
			alert('To join the post mailing list please enter your address.');
			joinmail.address1.focus();
			return(false);
		}	
		if (joinmail.town.value == ''){
			alert('To join the post mailing list please enter your town or city.');
			joinmail.town.focus();
			return(false);
		}
		if (joinmail.postcode.value == ''){
			alert('To join the post mailing list please enter your postcode.');
			joinmail.postcode.focus();
			return(false);
		}
	}
}
if ((!joinmail.terms.checked)&&(joinmail.subscribe.checked)) {
	alert('Please let us know you have seen our terms and conditions.');
	joinmail.terms.focus();
	return(false);
}
}