js日历控件-calendar.js

calendar.js

var cal;
var isFocus=false; // 是否为焦点
var pickMode ={
    "second":1,
    "minute":2,
    "hour":3,
    "day":4,
    "month":5,
    "year":6  };
    
var topY=0,leftX=0;  // 自定义定位偏移量 2007-02-11 由 寒羽枫添加
// 选择日期 → 由 寒羽枫 2007-06-10 添加，通过 ID 来选日期
function SelectDateById(id,strFormat,x,y)
{
	var obj = document.getElementById(id);
	if(obj == null){return false;}
	obj.focus();
	if(obj.onclick != null){obj.onclick();}
	else if(obj.click != null){obj.click();}
	else{SelectDate(obj,strFormat,x,y)}
}

// 选择日期 → 由 寒羽枫 2006-06-25 添加
function SelectDate(obj,strFormat,x,y)
{

	leftX =(x == null) ? leftX : x;
	topY  =(y == null) ? topY : y;// 自定义定位偏移量 2007-02-11 由 寒羽枫添加
	if(document.getElementById("ContainerPanel")==null){InitContainerPanel();}
    var date = new Date();
    var by = date.getFullYear()-50;  // 最小值 → 50 年前
    var ey = date.getFullYear()+50;  // 最大值 → 50 年后
    // cal = new Calendar(by, ey,1,strFormat); //初始化英文版，0 为中文版
    cal = (cal==null) ? new Calendar(by, ey, 0) : cal;    // 不用每次都初始化
															// 2006-12-03 修正
    cal.DateMode =pickMode["second"]; // 复位
      if(strFormat.indexOf('s')< 0) {cal.DateMode =pickMode["minute"];}// 精度为分
      if(strFormat.indexOf('m')< 0) {cal.DateMode =pickMode["hour"];}// 精度为时
      if(strFormat.indexOf('h')< 0) {cal.DateMode =pickMode["day"];}// 精度为日
      if(strFormat.indexOf('d')< 0) {cal.DateMode =pickMode["month"];}// 精度为月
      if(strFormat.indexOf('M')< 0) {cal.DateMode =pickMode["year"];}// 精度为年
      if(strFormat.indexOf('y')< 0) {cal.DateMode =pickMode["second"];}// 默认精度为秒
    cal.dateFormatStyleOld = cal.dateFormatStyle;
    cal.dateFormatStyle = strFormat;
    cal.show(obj);
}
/**//**//**//**//**//**//**//**
							 * 返回日期
							 * 
							 * @param d
							 *            the delimiter
							 * @param p
							 *            the pattern of your date 2006-06-25 由
							 *            寒羽枫 修改为根据用户指定的 style 来确定；
							 */
String.prototype.toDate = function(style) {
  var y = this.substring(style.indexOf('y'),style.lastIndexOf('y')+1);// 年
  var M = this.substring(style.indexOf('M'),style.lastIndexOf('M')+1);// 月
  var d = this.substring(style.indexOf('d'),style.lastIndexOf('d')+1);// 日
  var h = this.substring(style.indexOf('h'),style.lastIndexOf('h')+1);// 时
  var m = this.substring(style.indexOf('m'),style.lastIndexOf('m')+1);// 分
  var s = this.substring(style.indexOf('s'),style.lastIndexOf('s')+1);// 秒

  if(s == null ||s == "" || isNaN(s)) {s = new Date().getSeconds();}
  if(m == null ||m == "" || isNaN(m)) {m = new Date().getMinutes();}
  if(h == null ||h == "" || isNaN(h)) {h = new Date().getHours();}
  if(d == null ||d == "" || isNaN(d)) {d = new Date().getDate();}
  if(M == null ||M == "" || isNaN(M)) {M = new Date().getMonth()+1;}
  if(y == null ||y == "" || isNaN(y)) {y = new Date().getFullYear();}
  var dt ;
  eval ("dt = new Date('"+ y+"', '"+(M-1)+"','"+ d+"','"+ h+"','"+ m+"','"+ s +"')");
  return dt;
}

/**//**//**//**//**//**//**//**
							 * 格式化日期
							 * 
							 * @param d
							 *            the delimiter
							 * @param p
							 *            the pattern of your date
							 * @author meizz
							 */
Date.prototype.format = function(style) {
  var o = {
    "M+" : this.getMonth() + 1, // month
    "d+" : this.getDate(),      // day
    "h+" : this.getHours(),     // hour
    "m+" : this.getMinutes(),   // minute
    "s+" : this.getSeconds(),   // second
    "w+" : "天一二三四五六".charAt(this.getDay()),   // week
    "q+" : Math.floor((this.getMonth() + 3) / 3),  // quarter
    "S"  : this.getMilliseconds() // millisecond
  }
  if(/(y+)/.test(style)) {
    style = style.replace(RegExp.$1,
    (this.getFullYear() + "").substr(4 - RegExp.$1.length));
  }
  for(var k in o){
    if(new RegExp("("+ k +")").test(style)){
      style = style.replace(RegExp.$1,
        RegExp.$1.length == 1 ? o[k] :
        ("00" + o[k]).substr(("" + o[k]).length));
    }
  }
  return style;
}

// 2007-09-14 由寒羽枫添加返回所选日期
Calendar.prototype.ReturnDate = function(dt) {
    if (this.dateControl != null){this.dateControl.value = dt;}
    calendar.hide();
	if(this.dateControl.onchange == null){return;}	
	// 将 onchange 转成其它函数，以免触发验证事件
    var ev = this.dateControl.onchange.toString(); // 找出函数的字串
    ev = ev.substring(
			((ev.indexOf("ValidatorOnChange();")> 0) ? ev.indexOf("ValidatorOnChange();") + 20 : ev.indexOf("{") + 1)
				, ev.lastIndexOf("}"));// 去除验证函数 ValidatorOnChange();
	var fun = new Function(ev);		// 重新定义函数
	this.dateControl.changeEvent = fun;	
    this.dateControl.changeEvent();// 触发自定义 changeEvent 函数
}

/**//**//**//**//**//**//**//**
							 * 日历类
							 * 
							 * @param beginYear
							 *            1990
							 * @param endYear
							 *            2010
							 * @param lang
							 *            0(中文)|1(英语) 可自由扩充
							 * @param dateFormatStyle
							 *            "yyyy-MM-dd";
							 * @version 2006-04-01
							 * @author KimSoft (jinqinghua [at] gmail.com)
							 * @update
							 */
function Calendar(beginYear, endYear, lang, dateFormatStyle) {
  this.beginYear = 1950;
  this.endYear = 2050;
  this.lang = 0;            // 0(中文) | 1(英文)
  this.dateFormatStyle = "yyyy-MM-dd hh:mm:ss";

  if (beginYear != null && endYear != null){
    this.beginYear = beginYear;
    this.endYear = endYear;
  }
  if (lang != null){
    this.lang = lang
  }

  if (dateFormatStyle != null){
    this.dateFormatStyle = dateFormatStyle
  }

  this.dateControl = null;
  this.panel = this.getElementById("calendarPanel");
  this.container = this.getElementById("ContainerPanel");
  this.form  = null;

  this.date = new Date();
  this.year = this.date.getFullYear();
  this.month = this.date.getMonth();
  
  this.day = this.date.getDate();
  this.hour = this.date.getHours();
  this.minute = this.date.getMinutes();
  this.second = this.date.getSeconds();

  this.colors = {
  "cur_word"      : "#FFFFFF",  // 当日日期文字颜色
  "cur_bg"        : "#00FF00",  // 当日日期单元格背影色
  "sel_bg"        : "#FFCCCC",  // 已被选择的日期单元格背影色 2006-12-03 寒羽枫添加
  "sun_word"      : "#FF0000",  // 星期天文字颜色
  "sat_word"      : "#0000FF",  // 星期六文字颜色
  "td_word_light" : "#333333",  // 单元格文字颜色
  "td_word_dark"  : "#CCCCCC",  // 单元格文字暗色
  "td_bg_out"     : "#EFEFEF",  // 单元格背影色
  "td_bg_over"    : "#FFCC00",  // 单元格背影色
  "tr_word"       : "#FFFFFF",  // 日历头文字颜色
  "tr_bg"         : "#666666",  // 日历头背影色
  "input_border"  : "#CCCCCC",  // input控件的边框颜色
  "input_bg"      : "#EFEFEF"   // input控件的背影色
  }
/*
 * //2008-01-29 放到了 show ，因为要做 pickMode 判断 this.draw(); this.bindYear();
 * this.bindMonth();
 */
  // this.changeSelect();
  // this.bindData(); //2006-12-30 由民工.砖家注释
}

/**//**//**//**//**//**//**//**
							 * 日历类属性（语言包，可自由扩展）
							 */
Calendar.language = {
  "year"   : [[""], [""]],
  "months" : [["一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"],
        ["JAN","FEB","MAR","APR","MAY","JUN","JUL","AUG","SEP","OCT","NOV","DEC"]
         ],
  "weeks"  : [["日","一","二","三","四","五","六"],
        ["SUN","MON","TUR","WED","THU","FRI","SAT"]
         ],
  "hour"  : [["时"], ["H"]],
  "minute"  : [["分"], ["M"]],
  "second"  : [["秒"], ["S"]],
  "clear"  : [["清空"], ["CLS"]],
  "today"  : [["今天"], ["TODAY"]],
  "pickTxt"  : [["确定"], ["OK"]],// pickMode 精确到年、月时把今天变成“确定”
  "close"  : [["关闭"], ["CLOSE"]]
}

Calendar.prototype.draw = function() {
  calendar = this;

  var mvAry = [];
  // mvAry[mvAry.length] = ' <form name="calendarForm" style="margin: 0px;">';
	// //因 <form> 不能嵌套， 2006-12-01 由寒羽枫改用 Div
  mvAry[mvAry.length]  = '  <div name="calendarForm" style="margin: 0px;">';
  mvAry[mvAry.length]  = '    <table width="100%" border="0" cellpadding="0" cellspacing="1" style="font-size:12px;">';
  mvAry[mvAry.length]  = '      <tr>';
  mvAry[mvAry.length]  = '        <th align="left" width="1%"><input style="border: 1px solid ' + calendar.colors["input_border"] + ';background-color:' + calendar.colors["input_bg"] + ';width:16px;height:20px;';
  if(calendar.DateMode > pickMode["month"]){mvAry[mvAry.length]  = 'display:none;';}// pickMode
																					// 精确到年时隐藏“月”
  mvAry[mvAry.length]  ='" name="prevMonth" type="button" id="prevMonth" value="&lt;" /></th>';
  mvAry[mvAry.length]  = '        <th align="center" width="98%" nowrap="nowrap"><select name="calendarYear" id="calendarYear" style="font-size:12px;"></select><select name="calendarMonth" id="calendarMonth" style="font-size:12px;';
  if(calendar.DateMode > pickMode["month"]){mvAry[mvAry.length]  = 'display:none;';}// pickMode
																					// 精确到年时隐藏“月”
  mvAry[mvAry.length]  = '"></select></th>';
  mvAry[mvAry.length]  = '        <th align="right" width="1%"><input style="border: 1px solid ' + calendar.colors["input_border"] + ';background-color:' + calendar.colors["input_bg"] + ';width:16px;height:20px;';
  if(calendar.DateMode > pickMode["month"]){mvAry[mvAry.length]  = 'display:none;';}// pickMode
																					// 精确到年时隐藏“月”
  mvAry[mvAry.length]  ='" name="nextMonth" type="button" id="nextMonth" value="&gt;" /></th>';
  mvAry[mvAry.length]  = '      </tr>';
  mvAry[mvAry.length]  = '    </table>';
  mvAry[mvAry.length]  = '    <table id="calendarTable" width="100%" style="border:0px solid #CCCCCC;background-color:#FFFFFF;font-size:12px;';
  if(calendar.DateMode >= pickMode["month"]){mvAry[mvAry.length]  = 'display:none;';}// pickMode
																						// 精确到年、月时隐藏“天”
  mvAry[mvAry.length]  = '" border="0" cellpadding="3" cellspacing="1">';
  mvAry[mvAry.length]  = '      <tr>';
  for(var i = 0; i < 7; i++) {
    mvAry[mvAry.length]  = '      <th style="font-weight:normal;background-color:' + calendar.colors["tr_bg"] + ';color:' + calendar.colors["tr_word"] + ';">' + Calendar.language["weeks"][this.lang][i] + '</th>';
  }
  mvAry[mvAry.length]  = '      </tr>';
  for(var i = 0; i < 6;i++){
    mvAry[mvAry.length]  = '    <tr align="center">';
    for(var j = 0; j < 7; j++) {
      if (j == 0){
        mvAry[mvAry.length]  = '  <td style="cursor:default;color:' + calendar.colors["sun_word"] + ';"></td>';
      } else if(j == 6) {
        mvAry[mvAry.length]  = '  <td style="cursor:default;color:' + calendar.colors["sat_word"] + ';"></td>';
      } else {
        mvAry[mvAry.length]  = '  <td style="cursor:default;"></td>';
      }
    }
    mvAry[mvAry.length]  = '    </tr>';
  }

// 2009-03-03 添加的代码，放置时间的行
  mvAry[mvAry.length]  = '      <tr style="';
    if(calendar.DateMode >= pickMode["day"]){mvAry[mvAry.length]  = 'display:none;';}// pickMode
																						// 精确到时日隐藏“时间”
    mvAry[mvAry.length]  = '"><td align="center" colspan="7">';
  mvAry[mvAry.length]  = '      <select name="calendarHour" id="calendarHour" style="font-size:12px;"></select>' + Calendar.language["hour"][this.lang];
  mvAry[mvAry.length]  = '<span style="'
    if(calendar.DateMode >= pickMode["hour"]){mvAry[mvAry.length]  = 'display:none;';}// pickMode
																						// 精确到小时时隐藏“分”
  mvAry[mvAry.length]  = '"><select name="calendarMinute" id="calendarMinute" style="font-size:12px;"></select>' + Calendar.language["minute"][this.lang]+'</span>';
    mvAry[mvAry.length]  = '<span style="'
    if(calendar.DateMode >= pickMode["minute"]){mvAry[mvAry.length]  = 'display:none;';}// pickMode
																						// 精确到小时、分时隐藏“秒”
   mvAry[mvAry.length]  = '"><select name="calendarSecond" id="calendarSecond" style="font-size:12px;"></select>'+ Calendar.language["second"][this.lang]+'</span>';
  mvAry[mvAry.length]  = '      </td></tr>';
  
  mvAry[mvAry.length]  = '    </table>';
  // mvAry[mvAry.length] = ' </from>';
  mvAry[mvAry.length]  = '      <div align="center" style="padding:4px 4px 4px 4px;background-color:' + calendar.colors["input_bg"] + ';">';
  mvAry[mvAry.length]  = '        <input name="calendarClear" type="button" id="calendarClear" value="' + Calendar.language["clear"][this.lang] + '" style="border: 1px solid ' + calendar.colors["input_border"] + ';background-color:' + calendar.colors["input_bg"] + ';width:40px;height:20px;font-size:12px;cursor:pointer;"/>';
  mvAry[mvAry.length]  = '        <input name="calendarToday" type="button" id="calendarToday" value="' 
  mvAry[mvAry.length]  = (calendar.DateMode == pickMode["day"]) ? Calendar.language["today"][this.lang] : Calendar.language["pickTxt"][this.lang];
  mvAry[mvAry.length]  = '" style="border: 1px solid ' + calendar.colors["input_border"] + ';background-color:' + calendar.colors["input_bg"] + ';width:60px;height:20px;font-size:12px;cursor:pointer"/>';
  mvAry[mvAry.length]  = '        <input name="calendarClose" type="button" id="calendarClose" value="' + Calendar.language["close"][this.lang] + '" style="border: 1px solid ' + calendar.colors["input_border"] + ';background-color:' + calendar.colors["input_bg"] + ';width:40px;height:20px;font-size:12px;cursor:pointer"/>';
  mvAry[mvAry.length]  = '      </div>';
  
  mvAry[mvAry.length]  = '  </div>';
  this.panel.innerHTML = mvAry.join("");
  
  /**//**//**//** ****** 以下代码由寒羽枫 2006-12-01 添加 ********* */
  var obj = this.getElementById("prevMonth");
  obj.onclick = function () {calendar.goPrevMonth(calendar);}
  obj.onblur = function () {calendar.onblur();}
  this.prevMonth= obj;
  
  obj = this.getElementById("nextMonth");
  obj.onclick = function () {calendar.goNextMonth(calendar);}
  obj.onblur = function () {calendar.onblur();}
  this.nextMonth= obj;  

  obj = this.getElementById("calendarClear");
  obj.onclick = function () 
  { calendar.ReturnDate(""); /*
								 * calendar.dateControl.value =
								 * "";calendar.hide();
								 */// 2007-09-14
																					// 由寒羽枫注释
  }
  this.calendarClear = obj;
  
  obj = this.getElementById("calendarClose");
  obj.onclick = function () {calendar.hide();}
  this.calendarClose = obj;
  
  obj = this.getElementById("calendarYear");
  obj.onchange = function () {calendar.update(calendar);}
  obj.onblur = function () {calendar.onblur();}
  this.calendarYear = obj;
  
  obj = this.getElementById("calendarMonth");
  with(obj)
  {
    onchange = function () {calendar.update(calendar);}
    onblur = function () {calendar.onblur();}
  }this.calendarMonth = obj;
  
  obj = this.getElementById("calendarHour");
  obj.onchange = function () {calendar.hour = this.options[this.selectedIndex].value;}
  obj.onblur = function () {calendar.onblur();}
  this.calendarHour = obj;
   
  obj = this.getElementById("calendarMinute");
  obj.onchange = function () {calendar.minute = this.options[this.selectedIndex].value;}
  obj.onblur = function () {calendar.onblur();}
  this.calendarMinute = obj;
  
  obj = this.getElementById("calendarSecond");
  obj.onchange = function () {calendar.second = this.options[this.selectedIndex].value;}
  obj.onblur = function () {calendar.onblur();}
  this.calendarSecond = obj;

  obj = this.getElementById("calendarToday");
  obj.onclick = function () {
  var today = (calendar.DateMode != pickMode["day"]) ?
                    new Date(calendar.year,calendar.month,calendar.day,calendar.hour,calendar.minute,calendar.second)
                    : new Date();// 2008-01-29
    calendar.ReturnDate(today.format(calendar.dateFormatStyle));
  }
  this.calendarToday = obj;
}

// 年份下拉框绑定数据
Calendar.prototype.bindYear = function() {
  var cy = this.calendarYear;// 2006-12-01 由寒羽枫修改
  cy.length = 0;
  for (var i = this.beginYear; i <= this.endYear; i++){
    cy.options[cy.length] = new Option(i + Calendar.language["year"][this.lang], i);
  }
}

// 月份下拉框绑定数据
Calendar.prototype.bindMonth = function() {
  var cm = this.calendarMonth;// 2006-12-01 由寒羽枫修改
  cm.length = 0;
  for (var i = 0; i < 12; i++){
    cm.options[cm.length] = new Option(Calendar.language["months"][this.lang][i], i);
  }
}

// 小时下拉框绑定数据
Calendar.prototype.bindHour = function() {
  var ch = this.calendarHour;
  if(ch.length > 0){return;}// 2009-03-03 不需要重新绑定，提高性能
  // ch.length = 0;
  var h;
  for (var i = 0; i < 24; i++){
    h = ("00" + i +"").substr(("" + i).length);
    ch.options[ch.length] = new Option(h, h);
  }
}

// 分钟下拉框绑定数据
Calendar.prototype.bindMinute = function() {
  var cM = this.calendarMinute;
  if(cM.length > 0){return;}// 2009-03-03 不需要重新绑定，提高性能
  // cM.length = 0;
  var M;
  for (var i = 0; i < 60; i++){
    M = ("00" + i +"").substr(("" + i).length);
    cM.options[cM.length] = new Option(M, M);
  }
}

// 秒钟下拉框绑定数据
Calendar.prototype.bindSecond = function() {
  var cs = this.calendarSecond;
  if(cs.length > 0){return;}// 2009-03-03 不需要重新绑定，提高性能
  // cs.length = 0;
  var s;
  for (var i = 0; i < 60; i++){
    s = ("00" + i +"").substr(("" + i).length);
    cs.options[cs.length] = new Option(s, s);
  }
}

// 向前一月
Calendar.prototype.goPrevMonth = function(e){
  if (this.year == this.beginYear && this.month == 0){return;}
  this.month--;
  if (this.month == -1) {
    this.year--;
    this.month = 11;
  }
  this.date = new Date(this.year, this.month, 1);
  this.changeSelect();
  this.bindData();
}

// 向后一月
Calendar.prototype.goNextMonth = function(e){
  if (this.year == this.endYear && this.month == 11){return;}
  this.month++;
  if (this.month == 12) {
    this.year++;
    this.month = 0;
  }
  this.date = new Date(this.year, this.month, 1);
  this.changeSelect();
  this.bindData();
}

// 改变SELECT选中状态
Calendar.prototype.changeSelect = function() {
  var cy = this.calendarYear;// 2006-12-01 由寒羽枫修改
  var cm = this.calendarMonth;
  var ch = this.calendarHour;
  var cM = this.calendarMinute;
  var cs = this.calendarSecond;
// 2006-12-30 由民工.砖家修改，减少运算次数
  cy[this.date.getFullYear()-this.beginYear].selected = true;
  cm[this.date.getMonth()].selected =true;
  
// 2009-03-03 添加，初始化时间的值
  ch[this.hour].selected =true;
  cM[this.minute].selected =true;
  cs[this.second].selected =true;
}

// 更新年、月
Calendar.prototype.update = function (e){
  this.year  = e.calendarYear.options[e.calendarYear.selectedIndex].value;// 2006-12-01
																			// 由寒羽枫修改
  this.month = e.calendarMonth.options[e.calendarMonth.selectedIndex].value;
  this.date = new Date(this.year, this.month, 1);
  // this.changeSelect();
  this.bindData();
}

// 绑定数据到月视图
Calendar.prototype.bindData = function () {
  var calendar = this;
	if(calendar.DateMode >= pickMode["month"]){return;}// 2008-01-29
 // var dateArray = this.getMonthViewArray(this.date.getYear(),
	// this.date.getMonth());
  // 2006-12-30 由民工.砖家修改 在Firefox 下年份错误
  var dateArray = this.getMonthViewArray(this.date.getFullYear(), this.date.getMonth());
 var tds = this.getElementById("calendarTable").getElementsByTagName("td");
  for(var i = 0; i < tds.length; i++) {
  tds[i].style.backgroundColor = calendar.colors["td_bg_out"];
    tds[i].onclick = function () {return;}
    tds[i].onmouseover = function () {return;}
    tds[i].onmouseout = function () {return;}
    if (i > dateArray.length - 1) break;
    tds[i].innerHTML = dateArray[i];
    if (dateArray[i] != "&nbsp;"){
      tds[i].bgColorTxt = "td_bg_out"; // 2009-03-03 保存背景色的class
        var cur = new Date();
        tds[i].isToday = false;
      if (cur.getFullYear() == calendar.date.getFullYear() && cur.getMonth() == calendar.date.getMonth() && cur.getDate() == dateArray[i]) {
      // 是今天的单元格
        tds[i].style.backgroundColor = calendar.colors["cur_bg"];
        tds[i].bgColorTxt = "cur_bg";
        tds[i].isToday = true;
        }
    if(calendar.dateControl != null )
    {
      cur = calendar.dateControl.value.toDate(calendar.dateFormatStyle);
      if (cur.getFullYear() == calendar.date.getFullYear() && cur.getMonth() == calendar.date.getMonth()&& cur.getDate() == dateArray[i]) {
      // 是已被选中的单元格
        calendar.selectedDayTD = tds[i];
        tds[i].style.backgroundColor = calendar.colors["sel_bg"];
        tds[i].bgColorTxt = "sel_bg";
      }
    }
      tds[i].onclick = function () {
            if(calendar.DateMode == pickMode["day"]) // 2009-03-03
														// 当选择日期时，点击格子即返回值
            {
                calendar.ReturnDate(new Date(calendar.date.getFullYear(),
                                                    calendar.date.getMonth(),
                                                    this.innerHTML).format(calendar.dateFormatStyle));
            }
            else
            {
                if(calendar.selectedDayTD != null) // 2009-03-03 清除已选中的背景色
                {
                    calendar.selectedDayTD.style.backgroundColor =(calendar.selectedDayTD.isToday)? calendar.colors["cur_bg"] : calendar.colors["td_bg_out"];
                }
                this.style.backgroundColor = calendar.colors["sel_bg"];
                calendar.day = this.innerHTML;
                calendar.selectedDayTD = this; // 2009-03-03 记录已选中的日子
            }
          }
      tds[i].style.cursor ="pointer"; // 2007-08-06 由寒羽枫添加，鼠标变成手指状
      tds[i].onmouseover = function () {
        this.style.backgroundColor = calendar.colors["td_bg_over"];
      }
      tds[i].onmouseout = function () {
        if(calendar.selectedDayTD != this) {
        this.style.backgroundColor = calendar.colors[this.bgColorTxt];}
      }
      tds[i].onblur = function () {calendar.onblur();}
    }
  }
}

// 根据年、月得到月视图数据(数组形式)
Calendar.prototype.getMonthViewArray = function (y, m) {
  var mvArray = [];
  var dayOfFirstDay = new Date(y, m, 1).getDay();
  var daysOfMonth = new Date(y, m + 1, 0).getDate();
  for (var i = 0; i < 42; i++) {
    mvArray[i] = "&nbsp;";
  }
  for (var i = 0; i < daysOfMonth; i++){
    mvArray[i + dayOfFirstDay] = i + 1;
  }
  return mvArray;
}

// 扩展 document.getElementById(id) 多浏览器兼容性 from meizz tree source
Calendar.prototype.getElementById = function(id){
  if (typeof(id) != "string" || id == "") return null;
  if (document.getElementById) return document.getElementById(id);
  if (document.all) return document.all(id);
  try {return eval(id);} catch(e){ return null;}
}

// 扩展 object.getElementsByTagName(tagName)
Calendar.prototype.getElementsByTagName = function(object, tagName){
  if (document.getElementsByTagName) return document.getElementsByTagName(tagName);
  if (document.all) return document.all.tags(tagName);
}

// 取得HTML控件绝对位置
Calendar.prototype.getAbsPoint = function (e){
  var x = e.offsetLeft;
  var y = e.offsetTop;
  while(e = e.offsetParent){
    x += e.offsetLeft;
    y += e.offsetTop;
  }
  return {"x": x, "y": y};
}

// 显示日历
Calendar.prototype.show = function (dateObj, popControl) {
  if (dateObj == null){
    throw new Error("arguments[0] is necessary")
  }
  this.dateControl = dateObj;
  var now =  new Date();
  this.date = (dateObj.value.length > 0) ? new Date(dateObj.value.toDate(this.dateFormatStyle)) : now.format(this.dateFormatStyle).toDate(this.dateFormatStyle) ;// 2008-01-29
																																									// 寒羽枫添加
																																									// →
																																									// 若为空则根据dateFormatStyle初始化日期

  if(this.panel.innerHTML==""||cal.dateFormatStyleOld != cal.dateFormatStyle)// 2008-01-29
																				// 把构造表格放在此处，2009-03-03
																				// 若请示的样式改变，则重新初始化
  {
	this.draw();
	this.bindYear();
	this.bindMonth();
	this.bindHour();
	this.bindMinute();
	this.bindSecond();
  }
  this.year = this.date.getFullYear();
  this.month = this.date.getMonth();
  this.day = this.date.getDate();
  this.hour = this.date.getHours();
  this.minute = this.date.getMinutes();
  this.second = this.date.getSeconds();
  this.changeSelect();
  this.bindData();

  if (popControl == null){
    popControl = dateObj;
  }
  var xy = this.getAbsPoint(popControl);
  // this.panel.style.left = xy.x + "px";
  // this.panel.style.top = (xy.y + dateObj.offsetHeight) + "px";
  this.panel.style.left = (xy.x + leftX)+ "px"; // 由寒羽枫 2007-02-11 修改 → 加入自定义偏移量
  this.panel.style.top = (xy.y + topY + dateObj.offsetHeight) + "px";
  
  // 由寒羽枫 2006-06-25 修改 → 把 visibility 变为 display，并添加失去焦点的事件
	// //this.setDisplayStyle("select", "hidden");
  // this.panel.style.visibility = "visible";
  // this.container.style.visibility = "visible";
  this.panel.style.display = "";
  this.container.style.display = "";
  
  if( !this.dateControl.isTransEvent)
  {
	this.dateControl.isTransEvent = true;
	/*
	 * 已写在返回值的时候 ReturnDate 函数中，去除验证事件的函数 this.dateControl.changeEvent =
	 * this.dateControl.onchange;//将 onchange 转成其它函数，以免触发验证事件
	 * this.dateControl.onchange = function() {if(typeof(this.changeEvent)
	 * =='function'){this.changeEvent();}}
	 */
	if(this.dateControl.onblur != null){
	this.dateControl.blurEvent = this.dateControl.onblur;}// 2007-09-14
															// 保存主文本框的 onblur
															// ，使其原本的事件不被覆盖
	this.dateControl.onblur = function()
	{calendar.onblur();if(typeof(this.blurEvent) =='function'){this.blurEvent();}
	}
  }
  
  this.container.onmouseover = function(){isFocus=true;}
  this.container.onmouseout = function(){isFocus=false;}
}

// 隐藏日历
Calendar.prototype.hide = function() {
  // this.setDisplayStyle("select", "visible");
  // this.panel.style.visibility = "hidden";
  // this.container.style.visibility = "hidden";
  this.panel.style.display = "none";
  this.container.style.display = "none";
  isFocus=false;
}

// 焦点转移时隐藏日历 → 由寒羽枫 2006-06-25 添加
Calendar.prototype.onblur = function() {
    if(!isFocus){this.hide();}
}

// 以下由寒羽枫 2007-07-26 修改 → 确保日历容器节点在 body 最后，否则 FireFox 中不能出现在最上方
function InitContainerPanel() // 初始化容器
{
	var str = '<div id="calendarPanel" style="position: absolute;display: none;z-index:9999; background-color: #FFFFFF;border: 1px solid #CCCCCC;width:175px;font-size:12px;"></div>';
	if(document.all)
	{
		str += '<iframe style="position:absolute;z-index:2000;width:expression(this.previousSibling.offsetWidth);';
		str += 'height:expression(this.previousSibling.offsetHeight);';
		str += 'left:expression(this.previousSibling.offsetLeft);top:expression(this.previousSibling.offsetTop);';
		str += 'display:expression(this.previousSibling.style.display);" scrolling="no" frameborder="no"></iframe>';
	}
	var div = document.createElement("div");
	div.innerHTML = str;
	div.id = "ContainerPanel";
	div.style.display ="none";
	document.body.appendChild(div);
}// 调用calendar.show(dateControl, popControl);

demo.html

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript" src="js/calendar.js"></script>
</head>
<body>
<form name="form1" method="post" action="WebForm1.aspx" id="form1">
		<input type="text" value="" maxlength="100" id="Txt_CreateDateST01"
			onclick="SelectDate(this,'yyyy 年')" readonly="true"
			style="width: 265px; cursor: pointer" /><br /> <input type="text"
			value="" maxlength="100" id="Txt_CreateDateST02"
			onclick="SelectDate(this,'yyyy 年 MM 月')" readonly="true"
			style="width: 265px; cursor: pointer" /><br /> <input type="text"
			value="" maxlength="100" id="Txt_CreateDateST03"
			onclick="SelectDate(this,'yyyy//MM//dd')" readonly="true"
			style="width: 265px; cursor: pointer" /><br /> <input type="text"
			value="" maxlength="100" id="Text1"
			onclick="SelectDate(this,'yyyy-MM-dd hh时')" readonly="true"
			style="width: 265px; cursor: pointer" /><br /> <input type="text"
			value="" maxlength="100" id="Text3"
			onclick="SelectDate(this,'yyyy-MM-dd hh:mm')" readonly="true"
			style="width: 265px; cursor: pointer" /><br /> <input type="text"
			value="" maxlength="100" id="Text4"
			onclick="SelectDate(this,'yyyy年MM月dd日 hh时mm分ss秒',0,-150)"
			readonly="true" style="width: 265px; cursor: pointer" /><br />
	</form>
</body>
</html>

引自：http://blog.csdn.net/cityhunter172/article/details/3957836