function CalendaryItem(_id, _title, _content, _date) {
	this.id = _id;
	this.title = _title;
	this.content = _content;
	this.date = _date;
}

/**
 * Odrysowuje wydarzenie.
 */
CalendaryItem.prototype.draw = function(parentContainer) {
	var div = document.createElement("div");
	div.id = "calendary_" + this.id;
	div.className = "calendary";
	var title = document.createElement("div");
	title.id = "title_calendary_" + this.id;
	title.className = "calendaryTitle";
	var content = document.createElement("div");
	content.id = "content_calendary_" + this.id;
	content.className = "calendaryContent";
	var date = document.createElement("div");
	date.id = "date_calendary_" + this.id;
	date.className = "calendaryDate";
	title.innerHTML = this.title;
	content.innerHTML = this.content;
	date.innerHTML = this.date;
	div.appendChild(title);
	div.appendChild(content);
	div.appendChild(date);
	if (parentContainer != null) {
		parentContainer.appendChild(div);
	}
};