function loadCalendar( aDate ){
    url = 'calendar.php?action=list&date='+aDate;
    new Ajax.Request( url, {
            method: 'get',
            onSuccess: function(transport) {
                var container = $('calendar_container');
                container.update(transport.responseText);
            }
    });
}

function loadDay( aDate ){
    url = 'calendar.php?action=day&date='+aDate;
    new Ajax.Request( url, {
            method: 'get',
            onSuccess: function(transport) {
                var container = $('calendar_container');
                container.update(transport.responseText);
            }
    });
}