function getPriceTypeOptions(prefix, roomId)
{
	var request = new Ajax.Request('/reserverooms.php?' + prefix + '_ajax=true&' + prefix + '_action=getPriceTypeOptions&' + prefix + '_roomId=' + roomId,
		{
	         method: 'get',
	         onSuccess: function(response){
	       		$('priceTypeBlock').innerHTML = response.responseText;
	         }
		}
	);
}