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JavaScript blog式日历控件新算法

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> 
<title>blog式日历控件_www.jb51.net_脚本之家</title> 
</head> 
<body> 
<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);//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(); 
}, 
//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()); 
} 
};

</script> 
<style type="text/css">

.Calendar { 
font-family:Verdana; 
font-size:12px; 
background-color:#e0ecf9; 
text-align:center; 
width:200px; 
height:160px; 
padding:10px; 
line-height:1.5em; 
} 
.Calendar a{ 
color:#1e5494; 
}

.Calendar table{ 
width:100%; 
border:0; 
}

.Calendar table thead{color:#acacac;}

.Calendar table td { 
font-size: 11px; 
padding:1px; 
} 
#idCalendarPre{ 
cursor:pointer; 
float:left; 
padding-right:5px; 
} 
#idCalendarNext{ 
cursor:pointer; 
float:right; 
padding-right:5px; 
} 
#idCalendar td.onToday { 
font-weight:bold; 
color:#C60; 
} 
#idCalendar td.onSelect { 
font-weight:bold; 
} 
</style> 
<div class="Calendar"> 
<div id="idCalendarPre"><<</div> 
<div id="idCalendarNext">>></div> 
<span id="idCalendarYear">2008</span>年 <span id="idCalendarMonth">8</span>月 
<table cellspacing="0"> 
<thead> 
<tr> 
<td>日</td> 
<td>一</td> 
<td>二</td> 
<td>三</td> 
<td>四</td> 
<td>五</td> 
<td>六</td> 
</tr> 
</thead> 
<tbody id="idCalendar"> 
</tbody> 
</table> 
</div> 
<script language="JavaScript">

$("idCalendarPre").onclick = function(){ cale.PreMonth(); } 
$("idCalendarNext").onclick = function(){ cale.NextMonth(); }

</script> 
</body> 
</html>

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