$(document).ready(function() { $("#calendar").ical({ beforeMonth:function(date) { $.ajax({ type: "GET", url: "http://ymkindel.free.fr/wordpress/wp-content/plugins/dtm-ical-events-agenda/action.php", dataType: "json", data: "date="+date, async: false, success: function(json){ $.fn.ical.changeEventDates(json); } }) }, eventdates: {"dates": [ ] } }); });