function setCalendar(){
    obj.showCalendar(function(result) {
		if(document.getElementById("calendar")){
			var cal = document.getElementById("calendar");
			cal.innerHTML = result;
		}
    });
}

function backCalendar(){
    obj.backMonth();
    setTimeout("setCalendar()",100);
}

function fowardCalendar(){
    obj.forwardMonth();
    setTimeout("setCalendar()",100);
}

Event.observe(window, 'load', function() {
	setCalendar();
});