var cal;
var isFocus=false; //是否为焦点
var dateEle;
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
//选择日期，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
function SelectDate(obj, strFormat, x, y) {
	dateEle = obj;
    leftX = (x == null) ? leftX : x;
    topY = (y == null) ? topY : y;//自定义定位偏移量
    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 = (cal == null) ? new Calendar(by, ey, 0) : cal;     //初始化英文版，0 为中文版
    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);
}

//选择隐藏 calendarTable
function hidecandarTable() {
	 if(cal != null) cal.hide();
}

/**//**//**//**//**//**//**//**
* 返回日期
* @param d the delimiter
* @param p the pattern of your date
    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 由添加返回所选日期
Calendar.prototype.ReturnDate = function (dt) {
    if (this.dateControl != null) { this.dateControl.value = dt; }
    calendar.hide();
    autoChangeTextAreaSizeById(this.dateControl.id);
    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 年 MM 月 dd 日 hh 时 mm 分 ss 秒";

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 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 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 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 2007-02-11 修改 → 加入自定义偏移量
    this.panel.style.top = (xy.y + topY + dateObj.offsetHeight) + "px";

    //由 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;
	/*
    switch (dateEle.id) {
        case "input20":
        case "input48":
        case "input62":
            if (dateEle.value == "") {
                return;
            }

            var arrInputIds = ["input20", "input48", "input62"];
            for (var i = 0; i < arrInputIds.length; i++) {
                $("#" + arrInputIds[i]).value = dateEle.value;
            }
            break;
        case "input21":
        case "input49":
        case "input63":
            var arrInputIds = ["input21", "input49", "input63"];
            for (var i = 0; i < arrInputIds.length; i++) {
                $("#" + arrInputIds[i]).value = dateEle.value;
            }
            break;
        case "input28":
        case "input56":
        case "input69":
        case "input444":
            var arrInputIds = ["input28", "input56", "input69", "input444"];
            for (var i = 0; i < arrInputIds.length; i++) {
                $("#" + arrInputIds[i]).value = dateEle.value;
            }
            break;
        case "input361":
        case "input382":
        case "input403":
            var arrInputIds = ["input361", "input382", "input403"];
            for (var i = 0; i < arrInputIds.length; i++) {
                $("#" + arrInputIds[i]).value = dateEle.value;
            }
            break;
	   
    }*/
}

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

//以下由 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);
}