function addAGuest(id, options) {
	// Count number of li tags
	var guest_cnt = $$('#guest-list-'+id+' li').size();

	// Create li
	var li = document.createElement('li');
	Element.extend(li);

	var text = '<table cellpadding="0" cellspacing="0"><tr><td width="60">Guest ' + guest_cnt + ':</td><td><input type="text" name="guest_' + guest_cnt + '" value="" class="text" size="16" maxlength="128" /></td></tr><tr><td><hr /></td><td>'
	for (var i=0; i<options.length; i++) {
		text += '<input type="radio" name="type_'+guest_cnt+'" value="'+options[i]+'" /> '+options[i]+'&nbsp;';
	}
	text += '</td></tr></table>';
	li.update(text);

	// Insert element
	var els = '#guest-list-'+id+' li.add-a-guest';
	Element.insert($$(els).first(), { 'before' : li });
}