HTML静态日历：简洁实现动态功能

<br style="clear:both;">
<div id="calendar">
<script type="text/javascript">
var $ = function (id) {
    return "string" == typeof id ? document.getElementById(id) : id;
};
var Class = {
  create: function() {
    return function() {
      this.initialize.apply(this, arguments);
    }
  }
}
Object.extend = function(destination, source) {
    for (var property in source) {
        destination[property] = source[property];
    }
    return destination;
}
var Calendar = Class.create();
Calendar.prototype = {
  initialize: function(container, options) {
    this.Container = $(container);
    this.Days = [];
    this.SetOptions(options);
    this.Year = this.options.Year;
    this.Month = this.options.Month;
    this.SelectDay = this.options.SelectDay ? new Date(this.options.SelectDay) : null;
    this.onSelectDay = this.options.onSelectDay;
    this.onToday = this.options.onToday;