var Calendar = {
	prev_month: function(){
		this.cmonth--;
		if(this.cmonth==0){
			this.cmonth=12;
			this.cyear--;
		}
		this.set_loading();
		$("#calendar_cnt").load("index.php",'cyear='+this.cyear+
			'&cmonth='+this.cmonth+'&action=prev_month',make_popups);
	},
	next_month: function(){
		if(this.cmonth==12){
			this.cmonth=0;
			this.cyear++;
		}
		this.cmonth++;
		this.set_loading();
		$("#calendar_cnt").load("index.php",'cyear='+this.cyear+
			'&cmonth='+this.cmonth+'&action=next_month',make_popups);
	},
	set_loading: function(){
		$("#calendar_cnt").html("<div id='loader'><img src='images/loading.gif' alt='Loading'></div>");
	},
	cmonth: (new Date()).getMonth()+1,
	cyear: (new Date()).getFullYear()
};