function validateForm(form) {
	if(form.first_name.value == "") {
		alert("Please tell us your first name.");
		return false;
	} else if(form.phone_number.value == "" || isNaN(form.phone_number.value) || form.phone_number.value.length < 10) {
		alert("Please tell us your phone number.");
		return false;
	} else if(form.email_address.value == "") {
		alert("Please tell us your email address.");
		return false;
	}	else if(form.comments.value == "") {
		alert("Please leave a comment or suggestion.");
		return false;
	} else {
		return true;
	}
}