功能介绍：
1.正常的日历功能。
2.等等等
3.接收 数组
例如：
复制代码 代码如下:
new Calendar("id").show(
{
"20091120": "今天干了嘛嘛。。。",
"2009320": "今天干了嘛嘛。。。"
}
);

日历提示样式分为3类。
a. 当日
b.当年当月当日提示样式
c.当月当日提示样式
鼠标覆盖在有提示的日期上自动出现提示内容
4.。。。。。
主要分为2种用处。
1.提供一个 div 或其他 element 将该容器的 id 传给 Calendar。方法名为: show()
例: var cr = Calendar("div1");
cr.show( /*data - 该数组为可选项，如果传则有提示功能*/ );
2.提供一个 input[type='text'] 的元素 将该元素的 id 传给 Calendar。方法名为: pop()
例: var cr = Calendar("input2");
cr.pop();
其他的就不多说了。觉得好的话，就支持下。呵呵。
有什么问题或好的想法，请告诉我。谢谢
详细的用法和例子在压缩包里有。
演示地址
http://img.jb51.net/online/calendar/demo-1.html
http://img.jb51.net/online/calendar/demo-2.html
打包下载地址 https://www.jb51.net/codes/12595.html
复制代码 代码如下:
/*
* Calendar
* Language 0: Chinese, 1: English
* 1.Put calendar into the element html use 'show()'
* 2.Pop-up calendar use 'pop()'
*/

var Calendar = function( instanceId, language, startYear, endYear ){
    if( typeof instanceId == "string" ){
        this.Date     = new Date();
        this.Year     = this.Date.getFullYear();
        this.Month     = this.Date.getMonth();
        this.Week    = this.Date.getDay();
        this.Today    = this.Date.getDate();

        this.InstanceId = instanceId;
        this.Language    = language     || 1;
        this.StartYear    = startYear || this.Year - 5;
        this.EndYear    = endYear     || this.Year + 1;

        // If instance is input[type='text'] object
        this.popContainer_id = 'popCalendarContainer';

        // Message store
        this.msgStore = [];

        this.caleContainer_id = 'calendarContainer';
        this.caleTop = {
            today_view_id:        'calendarTodayView',
            week_view_id:        'calendarWeekView',
            lq_year_id:            'linkQuickYear',
            lq_month_id:        'linkQuickMonth',
            sq_year_id:            'selectQuickYear',
            sq_month_id:        'selectQuickMonth',
            close_id:            'calendarClose',
            prev_month_id:        'toPrevMonth',
            back_today_id:        'backToday',
            next_month_id:        'toNextMonth'
        }
        this.daysContainer_id = 'calendarDaysContainer';
        this.msgContainer_id = 'calendarTipsContainer';

        this.curDayClass =         'calendarCurrentDay';
        this.tipDayClass =        'calendarTipDay';
        this.oldTipDayClass =    'calendarOldTipDay';
    }
};
/* Calendar language */
Calendar.lang = {
weeks:     [
                ["星期天", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"],
                ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"]
            ],
weeksMenu:[
                 ["日","一","二","三","四","五","六"],
             ["SUN","MON","TUR","WED","THU","FRI","SAT"]
    ]
};
/* Create calendar element */
Calendar.prototype._getViewElement = function(){
    // Create page html element
    var caleElem = "";
        // Create Start
        caleElem+= '<div id='+this.caleContainer_id+'>';

        // <Top>
        caleElem+= '<div id="calendarTopContainer"><table cellpadding="0" cellspacing="0"><tr>';

        // Top day view
        caleElem+= '<td id='+this.caleTop.today_view_id+'></td>';

        // Link or select control
        caleElem+= '<td>';
        caleElem+= '<div id='+this.caleTop.week_view_id+'></div>';
        caleElem+= '<table id="calendarYearMonthContainer" cellpadding="0" cellspacing="0">';
        caleElem+= '<tr>';
        caleElem+= '<td>';
        caleElem+= '<a id='+this.caleTop.lq_year_id+' href="javascript:void(0);"></a>';
        caleElem+= '<select id='+this.caleTop.sq_year_id+'></select>';
        caleElem+= '</td>';
        caleElem+= '<td>.</td>';
        caleElem+= '<td>';
        caleElem+= '<a id='+this.caleTop.lq_month_id+' href="javascript:void(0);"></a>';
        caleElem+= '<select id='+this.caleTop.sq_month_id+'></select>';
        caleElem+= '</td>';
        caleElem+= '</tr>';
        caleElem+= '</table>';
        caleElem+= '</td>';

        // Quick control
        caleElem+= '<td>';
        caleElem+= '<div id="calendarCloseContainer">';
        caleElem+= '<a id='+this.caleTop.close_id+' href="javascript:void(0);">x</a>';
        caleElem+= '</div>';

        caleElem+= '<div id="calendarQuickContainer">';
        caleElem+= '<a id='+this.caleTop.prev_month_id+' href="javascript:void(0);">&laquo;</a>';
        caleElem+= '<a id='+this.caleTop.back_today_id+' href="javascript:void(0);">&nbsp;</a>';
        caleElem+= '<a id='+this.caleTop.next_month_id+' href="javascript:void(0);">&raquo;</a>';
        caleElem+= '</div>';
        caleElem+= '</td>';

        caleElem+= '</tr></table cellpadding="0" cellspacing="0"></div>';
        // </Top>

        // <Calendar View>
        caleElem+= '<div id="calendarMainContainer">';
        // Week menu
        caleElem+= '<div id="calendarWeeksContainer">';
        for(var i = 0; i < 7; i ++){
        caleElem+= '<span>'+Calendar.lang["weeksMenu"][this.Language][i]+'</span>';
        }
        caleElem+= '</div>';

        // Days view
        caleElem+= '<table id='+this.daysContainer_id+' cellpadding="0" cellspacing="0">';
        for(var tr = 0; tr < 6; tr ++){
        caleElem+= '<tr>';
        for(var td = 0; td < 7; td ++){
        caleElem+= '<td><span></span></td>';
        }
        caleElem+= '</tr>';
        }
        caleElem+= '</table>';

        caleElem+= '</div>';
        // </Calendar View>

        caleElem+= '</div>';

        // <Calendar msg>
        caleElem+= '<div id='+this.msgContainer_id+'></div>';
        // </Calendar msg>

        // Create End
    return caleElem;
};
/* Get Month Data */
Calendar.prototype._getMonthViewArray = function( year, month ){
    var monthArray = [];
    // From the beginning day of the week
    var beginDayOfWeek = new Date( year, month, 1).getDay();

    // This month total days
    var daysOfMonth = new Date( year, month + 1, 0).getDate();

    // 42: 7*6 matrix
    for( var i = 0; i < 42; i ++ )
     monthArray[i] = "&nbsp;";

    for( var j = 0; j < daysOfMonth; j ++ )
        monthArray[j + beginDayOfWeek] = j + 1 ;

    return monthArray;
};
/* Search the index of option in the select */
Calendar.prototype._getOptionIndex = function( selectObject, value ){
    for( var j = 0; j < selectObject.options.length; j ++ ){
        if( value == selectObject.options[j].value )
            return j;
    }
};
/* Bind year data into 'Year select' */
Calendar.prototype._bindYearIntoSelect = function(){
    var oYear = this.find( this.caleTop.sq_year_id );
    var oYearLen = 0;
    for( var i = this.StartYear; i <= this.EndYear; i ++, oYearLen ++ )
        oYear.options[oYearLen] = new Option( i , i );
};
/* Bind Month data into 'Month select' */
Calendar.prototype._bindMonthIntoSelect = function(){
    var oMonth = this.find( this.caleTop.sq_month_id );
    var oMonthLen = 0;
    for( var i = 0; i < 12; i ++, oMonthLen ++ )
        oMonth.options[oMonthLen] = new Option( i + 1 , i + 1 );
};
/* Bind data */
Calendar.prototype._bindAllData = function( curYear, curMonth ){
    var cr = this;
    // Bind default Data into 'select:Year'
    this._bindYearIntoSelect();

    // Bind default Data into 'select:Month'
    this._bindMonthIntoSelect();

    // Change the 'select:Year' and 'select:Month' value
    this.changeSelectValue( curYear, curMonth );

    // Bind default data into 'current day view and current week view'
    this.find( this.caleTop.week_view_id ).innerHTML = Calendar.lang['weeks'][this.Language][this.Week];
    this.find( this.caleTop.today_view_id ).innerHTML = this.Today;

    // Get days and bind into 'CalendarMain'
    // Add current day class and mouse event
    var daysOfMonthArray = this._getMonthViewArray( curYear, curMonth );
    var spans = this.find( this.daysContainer_id, "span" );
    var curYMD = this.Year + "" + ( this.Month + 1 ) + "" + this.Today;
    var selectYear = this.find( this.caleTop.sq_year_id ).value;
    var selectMonth = this.find( this.caleTop.sq_month_id ).value;
    for( var i = 0; i < spans.length; i ++ ){
        spans[i].innerHTML = daysOfMonthArray[i];
        var selectYMD = selectYear + "" + selectMonth + "" + spans[i].innerHTML;
        if( curYMD == selectYMD )
            spans[i].className = this.curDayClass;
        else
            spans[i].className = "";
    }
    // If not some days has pop message
    if( this.msgStore != "" )
        this._initPopMsg( this.msgStore );
}
/* Bind event */
Calendar.prototype._bindAllEvent = function(){
    var cr = this;
    // 'toPrevMonth, toNextMonth, backToday, today view' event
    this.find( this.caleTop.prev_month_id ).onclick = function(){ cr.goPrevOrNextMonth(this); };
    this.find( this.caleTop.next_month_id ).onclick = function(){ cr.goPrevOrNextMonth(this); };
    this.find( this.caleTop.back_today_id ).onclick    = function(){ cr.backToday(); };
    this.find( this.caleTop.today_view_id ).onclick = function(){ cr.backToday(); };

    // 'year and month select' onchange event
    this.find( this.caleTop.sq_year_id ).onchange = function(){ cr.updateSelect(); };
    this.find( this.caleTop.sq_month_id ).onchange    = function(){ cr.updateSelect(); };

    // Quick link event
    this.find( this.caleTop.lq_year_id ).onclick = function(){
        cr.showHide( cr.caleTop.lq_year_id, "none" );
        cr.showHide( cr.caleTop.sq_year_id, "block" );
    };
    this.find( this.caleTop.lq_month_id ).onclick = function(){
        cr.showHide( cr.caleTop.lq_month_id, "none" );
        cr.showHide( cr.caleTop.sq_month_id, "block" );
    };

    // Remove the link dotted line
    var oLink = this.find( this.caleContainer_id, "a" )
    for( var i = 0; i < oLink.length; i ++ ){
        oLink[i].onfocus = function(){ this.blur(); }
    }
}
/* Bind calendar for calendar view */
Calendar.prototype._initCalendar = function(){
    this._bindAllEvent();
    this._bindAllData( this.Year, this.Month );
};
/* Change the quick select value */
Calendar.prototype.changeSelectValue = function( year, month ){
    var ymArray = [], selectArray = [], linkArray = [];
    // Store the 'year' and 'month' to Array
    ymArray[0] = year; ymArray[1] = month + 1;

    // Store the 'selectYear_id' and 'selectMonth_id' to Array
    selectArray[0] = this.caleTop.sq_year_id; selectArray[1] = this.caleTop.sq_month_id;

    linkArray[0] = this.caleTop.lq_year_id; linkArray[1] = this.caleTop.lq_month_id;

    for( var i = 0; i < selectArray.length; i ++ ){
        var selectObject = this.find( selectArray[i] );
        // Get the return index
        var index = this._getOptionIndex( selectObject, ymArray[i] );
        // Reset the 'year', 'month' select and link value
        selectObject.options[index].selected = "selected";

        this.find( linkArray[i] ).innerHTML = selectObject.value;
    }

    this.resetLinkSelect();
};
/* Search next or previons month */
Calendar.prototype.goPrevOrNextMonth = function( obj ){
    var curMonthSelect = this.find( this.caleTop.sq_month_id );
    var curMonth = parseInt( curMonthSelect.value );
    var curYear = this.find( this.caleTop.sq_year_id ).value;
    // If 'next' get current month select + 1
    // If 'prev' get current month select - 1
    if( obj.id == this.caleTop.next_month_id )
        curMonthSelect.value = curMonth + 1;
    else
        curMonthSelect.value = curMonth - 1;

    var getNowMonth = curMonthSelect.value - 1;
    if( getNowMonth == -1 && curMonth == 1)     getNowMonth = 0;
    if( getNowMonth == -1 && curMonth == 12 )     getNowMonth = 11;

    this._bindAllData( curYear, getNowMonth );
};
/* If 'select:Year' and 'select:Month' change value update data */
Calendar.prototype.updateSelect = function(){
    var yearSelectValue     = this.find( this.caleTop.sq_year_id ).value;
    var monthSelectValue = this.find( this.caleTop.sq_month_id ).value;
    // Re-bind Panel Data
    this._bindAllData( yearSelectValue, monthSelectValue - 1 );

};
/* Back to taday: re-load '_bindAllData()' */
Calendar.prototype.backToday = function(){
    this._bindAllData( this.Year, this.Month );
};
/* Find the instance object or children of instance object by Id */
Calendar.prototype.find = function( elemId, childTag ){
    if( !childTag )
        // Return: object
        return document.getElementById( elemId );
    else
        // Return: object array
        return this.find( elemId ).getElementsByTagName( childTag );
};
/* Set element css */
Calendar.prototype.css = function( oId, selector ){
    var o = this.find( oId );
    selector['left']?o.style.left = selector['left']:"";
    selector['top']?o.style.top = selector['top']:"";
    selector['position']? o.style.position = selector['position']:"";
}
/* Check calendar show or hidden */
Calendar.prototype.showHide = function( objectId, dis ){
    return this.find( objectId ).style.display = dis;
};
/* Init the top quick menu link and select */
Calendar.prototype.resetLinkSelect = function(){
    this.showHide( this.caleTop.sq_year_id, "none" );
    this.showHide( this.caleTop.sq_month_id, "none" );
    this.showHide( this.caleTop.lq_year_id, "block" );
    this.showHide( this.caleTop.lq_month_id, "block" );
};
/* Put this calendar into the html of instance */
Calendar.prototype.show = function( msgData ){
    var obj = this.find( this.InstanceId );
    if( obj ){
        obj.innerHTML = this._getViewElement();
        // Init calendar event and data
        this._initCalendar();

        // This function don't have 'close'
        this.showHide( this.caleTop.close_id, "none" );
        if( typeof msgData == 'object'){
            this.msgStore = msgData;
            this._initPopMsg( this.msgStore );
        }
    }
};
/* Init pop message */
Calendar.prototype._initPopMsg = function(){
    var cr = this;
    var selectYear = this.find( this.caleTop.sq_year_id ).value;
    var selectMonth = this.find( this.caleTop.sq_month_id ).value;
    var daysOfMonthArray = this._getMonthViewArray( selectYear, selectMonth );
    var spans = this.find( this.daysContainer_id, "span" );
    for( var key in this.msgStore ){
        var keyMD = key.substring( 4 );
        var keyY = key.substring( 0, 4 );
        for( var i = 0; i < spans.length; i ++){
            var getMD = selectMonth + "" + spans[i].innerHTML;
            if( getMD == keyMD ){
                if( selectYear == keyY )
                    spans[i].className = this.tipDayClass +" "+ keyY;
                else
                    spans[i].className = this.oldTipDayClass +" "+ keyY;    
                spans[i].onmouseover = function(){
                    var hoverDate = this.className.split(" ")[1] + "" + selectMonth + "" + this.innerHTML;
                    var y = this.className.split(" ")[1],
                        m = selectMonth,
                        d = this.innerHTML;
                    cr.find( cr.msgContainer_id ).innerHTML = cr._getMsgHtml( y, m, d );
                    cr.showHide( cr.msgContainer_id, "block" );
                }
            }
        }
    }
    cr.find( cr.caleContainer_id ).onmouseout = function(){
        cr.showHide( cr.msgContainer_id, "none" );
    }
};
/* Get message */
Calendar.prototype._getMsgHtml =function( y, m, d ){
    var date = y + m + d;
    var showDate = y + "-" + m + "-" + d;
    var msgHtml = '<div>'+showDate+':</div><div>'+ this.msgStore[date] +'</div>';
    return msgHtml;
}
/* Pop-up the calendar */
Calendar.prototype.pop = function(){
    var cr = this;
    var obj    = this.find( this.InstanceId );
    if( obj ){
        // Instance object click then pop-up the calendar
        obj.onclick = function( e ){
            var e = window.event || e;
            var x = e.x || e.pageX,
                y = e.y || e.pageY;
            if( !cr.find( cr.popContainer_id ) ){
                // Create the pop-up div
                var oDiv = document.createElement("div");
                oDiv.id = cr.popContainer_id;
                document.body.appendChild( oDiv );
            }else{
                cr.showHide( cr.popContainer_id, "block" );
            }
            cr.find( cr.popContainer_id ).innerHTML = cr._getViewElement();

            // Init calendar event and data
            cr._initCalendar();

            // Set days click event
            cr.popDaysClickEvent( obj );

            // Set position
            cr.css( cr.popContainer_id, {position: "absolute", left: x + "px", top: y + "px"});

            // Close panel event
            cr.find( cr.caleTop.close_id ).onclick = function(){ cr.showHide( cr.popContainer_id, "none" ); };
        };
    }
};
/* Click the pop calendar days event [For INPUT] */
Calendar.prototype.popDaysClickEvent = function( obj ){
    var cr = this;
    var spans = cr.find( cr.daysContainer_id, "span" );
    for( var i = 0; i < spans.length; i ++ )
        spans[i].onclick = function(){
            if( this.innerHTML != "&nbsp;" ){
                var getYear     = cr.find( cr.caleTop.sq_year_id ).value;
                var getMonth = cr.find( cr.caleTop.sq_month_id ).value;
                obj.value = getYear +"-"+ getMonth +"-" + this.innerHTML;
                cr.showHide( cr.popContainer_id, "none" );
            }
        }
};