function validatefields(){
	var nlen = document.contact.from.value.length;
	var plen = document.contact.phone.value.length;
	var elen = document.contact.email.value.length;
	var clen = document.contact.comments.value.length;
	
	if (nlen == 0){
		alert("Please enter your name");
		return false;
	}
	if(plen == 0 && elen == 0) {
		alert("Please enter either your phone number or a valid email address");
		return false;
	}
	if(clen == 0) {
		alert("Please enter your comments");
		return false;
	}
	return true;
}