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);//容器(table结构) 
		this.Days = [];//日期对象列表 
		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; 
		this.onFinish = this.options.onFinish; 
		this.Draw(); 
	}, 
	//设置默认属性 
	SetOptions: function(options) { 
		this.options = {//默认值 
			Year: new Date().getFullYear(),//显示年 
			Month: new Date().getMonth() + 1,//显示月 
			SelectDay: null,//选择日期 
			onSelectDay: function(){},//在选择日期触发 
			onToday: function(){},//在当天日期触发 
			onFinish: function(){}//日历画完后触发 
		}; 
		Object.extend(this.options, options || {}); 
	}, 
	//上一个月 
	PreMonth: function() { 
		//先取得上一个月的日期对象 
		var d = new Date(this.Year, this.Month - 2, 1); 
		//再设置属性 
		this.Year = d.getFullYear(); 
		this.Month = d.getMonth() + 1; 
		//重新画日历 
		this.Draw(); 
		
		//this.loadTime();
	}, 
	//下一个月 
	NextMonth: function() { 
		var d = new Date(this.Year, this.Month, 1); 
		this.Year = d.getFullYear(); 
		this.Month = d.getMonth() + 1; 
		this.Draw(); 
	}, 
	//画日历 
	Draw: function() { 
		//用来保存日期列表 
		var arr = []; 
		//用当月第一天在一周中的日期值作为当月离第一天的天数 
		for(var i = 1, firstDay = new Date(this.Year, this.Month - 1, 1).getDay(); i <= firstDay; i++)
		{ 
			arr.push(" "); 
		} 
		//用当月最后一天在一个月中的日期值作为当月的天数 
		for(var i = 1, monthDay = new Date(this.Year, this.Month, 0).getDate(); i <= monthDay; i++)
		{ 
			arr.push(i); 
		} 
		var frag = document.createDocumentFragment(); 
		this.Days = []; 
		while(arr.length > 0){ 
			//每个星期插入一个tr 
			var row = document.createElement("tr"); 
			//每个星期有7天 
			for(var i = 1; i <= 7; i++){ 
				var cell = document.createElement("td"); 
				cell.innerHTML = " "; 
				if(arr.length > 0){ 
					var d = arr.shift(); 
					cell.innerHTML = d; 
					if(d > 0){ 
						this.Days[d] = cell; 
						//判断是否今日 
						if(this.IsSame(new Date(this.Year, this.Month - 1, d), new Date()))
						{ 
							this.onToday(cell); 
						} 
						//判断是否选择日期 
						if(this.SelectDay && this.IsSame(new Date(this.Year, this.Month - 1, d), this.SelectDay))
						{ 
							this.onSelectDay(cell); 
						} 
					} 
				} 
				row.appendChild(cell); 
			} 
			frag.appendChild(row); 
		} 
		//先清空内容再插入(ie的table不能用innerHTML) 
		while(this.Container.hasChildNodes())
		{ 
			this.Container.removeChild(this.Container.firstChild); 
		} 
		this.Container.appendChild(frag); 
		this.onFinish(); 
	}, 
	//判断是否同一日 
	IsSame: function(d1, d2) { 
		return (d1.getFullYear() == d2.getFullYear() && d1.getMonth() == d2.getMonth() && d1.getDate() == d2.getDate()); 
	},
	loadTime:function(){
		var dArr = this.Days;
		var url = uu.urlUtil.encode("/blog/blogAction!getDate.uu");
		var dateStr = this.Year + "-" + this.Month;
	 	var myAjax = new Ajax.Request(
		   url,
		   {
			 asynchronous: 'true',
			 method:'post',
			 postBody: "cuDate=" + dateStr + "&name=" + encodeURI(encodeURI(Blog.userName)),
			 onSuccess:function(transport)
			 {
			 	var resp = transport.responseText || "";
			 	var json = resp.evalJSON(true);
			 	var flag = json.art;
				if(flag.length != 0){
					for(var i = 0, len = flag.length; i < len; i++){ 
						if(flag[i].day == new Date().getDate())
							dArr[flag[i].day].innerHTML = "<a href='/" + Blog.handle + "/blog_" + flag[i].id +"_1.shtml'><span class='currentDay'>" + flag[i].day + "</span></a>";
						else
							dArr[flag[i].day].innerHTML = "<a href='/" + Blog.handle + "/blog_" + flag[i].id +"_1.shtml'>" + flag[i].day + "</a>";
					} 
				}
			 }
		   }
		); 
	}
};