function validate()
{
	if (document.bp.fn.value == '') { 
		alert ('Please enter your first name.');
		return false;
	}
	if (document.bp.ln.value == '') { 
		alert ('Please enter your last name.');
		return false;
	}
	if (document.bp.a1.value == '') { 
		alert ('Please enter your address.');
		return false;
	}
	if (document.bp.pc.value == '') { 
		alert ('Please enter your postcode.');
		return false;
	}
	if (document.bp.dt.value == '') { 
		alert ('Please enter your daytime telephone number.');
		return false;
	}
	if (document.bp.em.value == '') { 
		alert ('Please enter your email address.');
		return false;
	}
	return true;
}