var Calendar = Class.create();

Calendar.prototype = {
    title:'',
    event_count:'',
    vevent_container: Array(),
    add: function(vevent) {
        var container = document.createElement('div');
        container.appendChild(vevent.draw());
        this._element.appendChild(container);
        this.vevent_container[vevent.id] = container;
        this.event_count.increment();
    },

    remove: function(vevent) {
        container = this.vevent_container[vevent.id];
        if(container) {
            this._element.removeChild(container);
            this.event_count.decrement();
        }
    }
}

var Counter = Class.create();

Counter.prototype = {
    value: 0,
    increment: function() {
        this.value++;
        this.updateValue();
    },
    decrement: function() {
        this.value--;
        this.updateValue();
    },
    updateValue: function() {
        this._element.firstChild.innerHTML = this.value;
    }
}