/*!

* Datepicker for Bootstrap v1.7.1 (https://github.com/uxsolutions/bootstrap-datepicker)
*
* Licensed under the Apache License v2.0 (http://www.apache.org/licenses/LICENSE-2.0)
*/

(function(factory){

if (typeof define === "function" && define.amd) {
    define(["jquery"], factory);
} else if (typeof exports === 'object') {
    factory(require('jquery'));
} else {
    factory(jQuery);
}

}(function($, undefined){

    function UTCDate(){
            return new Date(Date.UTC.apply(Date, arguments));
    }
    function UTCToday(){
            var today = new Date();
            return UTCDate(today.getFullYear(), today.getMonth(), today.getDate());
    }
    function isUTCEquals(date1, date2) {
            return (
                    date1.getUTCFullYear() === date2.getUTCFullYear() &&
                    date1.getUTCMonth() === date2.getUTCMonth() &&
                    date1.getUTCDate() === date2.getUTCDate()
            );
    }
    function alias(method, deprecationMsg){
            return function(){
                    if (deprecationMsg !== undefined) {
                            $.fn.datepicker.deprecated(deprecationMsg);
                    }

                    return this[method].apply(this, arguments);
            };
    }
    function isValidDate(d) {
            return d && !isNaN(d.getTime());
    }

    var DateArray = (function(){
            var extras = {
                    get: function(i){
                            return this.slice(i)[0];
                    },
                    contains: function(d){
                            // Array.indexOf is not cross-browser;
                            // $.inArray doesn't work with Dates
                            var val = d && d.valueOf();
                            for (var i=0, l=this.length; i < l; i++)
      // Use date arithmetic to allow dates with different times to match
      if (0 <= this[i].valueOf() - val && this[i].valueOf() - val < 1000*60*60*24)
                                            return i;
                            return -1;
                    },
                    remove: function(i){
                            this.splice(i,1);
                    },
                    replace: function(new_array){
                            if (!new_array)
                                    return;
                            if (!$.isArray(new_array))
                                    new_array = [new_array];
                            this.clear();
                            this.push.apply(this, new_array);
                    },
                    clear: function(){
                            this.length = 0;
                    },
                    copy: function(){
                            var a = new DateArray();
                            a.replace(this);
                            return a;
                    }
            };

            return function(){
                    var a = [];
                    a.push.apply(a, arguments);
                    $.extend(a, extras);
                    return a;
            };
    })();

    // Picker object

    var Datepicker = function(element, options){
            $.data(element, 'datepicker', this);
            this._process_options(options);

            this.dates = new DateArray();
            this.viewDate = this.o.defaultViewDate;
            this.focusDate = null;

            this.element = $(element);
            this.isInput = this.element.is('input');
            this.inputField = this.isInput ? this.element : this.element.find('input');
            this.component = this.element.hasClass('date') ? this.element.find('.add-on, .input-group-addon, .btn') : false;
            if (this.component && this.component.length === 0)
                    this.component = false;
            this.isInline = !this.component && this.element.is('div');

            this.picker = $(DPGlobal.template);

            // Checking templates and inserting
            if (this._check_template(this.o.templates.leftArrow)) {
                    this.picker.find('.prev').html(this.o.templates.leftArrow);
            }

            if (this._check_template(this.o.templates.rightArrow)) {
                    this.picker.find('.next').html(this.o.templates.rightArrow);
            }

            this._buildEvents();
            this._attachEvents();

            if (this.isInline){
                    this.picker.addClass('datepicker-inline').appendTo(this.element);
            }
            else {
                    this.picker.addClass('datepicker-dropdown dropdown-menu');
            }

            if (this.o.rtl){
                    this.picker.addClass('datepicker-rtl');
            }

            if (this.o.calendarWeeks) {
                    this.picker.find('.datepicker-days .datepicker-switch, thead .datepicker-title, tfoot .today, tfoot .clear')
                            .attr('colspan', function(i, val){
                                    return Number(val) + 1;
                            });
            }

            this._process_options({
                    startDate: this._o.startDate,
                    endDate: this._o.endDate,
                    daysOfWeekDisabled: this.o.daysOfWeekDisabled,
                    daysOfWeekHighlighted: this.o.daysOfWeekHighlighted,
                    datesDisabled: this.o.datesDisabled
            });

            this._allow_update = false;
            this.setViewMode(this.o.startView);
            this._allow_update = true;

            this.fillDow();
            this.fillMonths();

            this.update();

            if (this.isInline){
                    this.show();
            }
    };

    Datepicker.prototype = {
            constructor: Datepicker,

            _resolveViewName: function(view){
                    $.each(DPGlobal.viewModes, function(i, viewMode){
                            if (view === i || $.inArray(view, viewMode.names) !== -1){
                                    view = i;
                                    return false;
                            }
                    });

                    return view;
            },

            _resolveDaysOfWeek: function(daysOfWeek){
                    if (!$.isArray(daysOfWeek))
                            daysOfWeek = daysOfWeek.split(/[,\s]*/);
                    return $.map(daysOfWeek, Number);
            },

            _check_template: function(tmp){
                    try {
                            // If empty
                            if (tmp === undefined || tmp === "") {
                                    return false;
                            }
                            // If no html, everything ok
                            if ((tmp.match(/[<>]/g) || []).length <= 0) {
                                    return true;
                            }
                            // Checking if html is fine
                            var jDom = $(tmp);
                            return jDom.length > 0;
                    }
                    catch (ex) {
                            return false;
                    }
            },

            _process_options: function(opts){
                    // Store raw options for reference
                    this._o = $.extend({}, this._o, opts);
                    // Processed options
                    var o = this.o = $.extend({}, this._o);

                    // Check if "de-DE" style date is available, if not language should
                    // fallback to 2 letter code eg "de"
                    var lang = o.language;
                    if (!dates[lang]){
                            lang = lang.split('-')[0];
                            if (!dates[lang])
                                    lang = defaults.language;
                    }
                    o.language = lang;

                    // Retrieve view index from any aliases
                    o.startView = this._resolveViewName(o.startView);
                    o.minViewMode = this._resolveViewName(o.minViewMode);
                    o.maxViewMode = this._resolveViewName(o.maxViewMode);

                    // Check view is between min and max
                    o.startView = Math.max(this.o.minViewMode, Math.min(this.o.maxViewMode, o.startView));

                    // true, false, or Number > 0
                    if (o.multidate !== true){
                            o.multidate = Number(o.multidate) || false;
                            if (o.multidate !== false)
                                    o.multidate = Math.max(0, o.multidate);
                    }
                    o.multidateSeparator = String(o.multidateSeparator);

                    o.weekStart %= 7;
                    o.weekEnd = (o.weekStart + 6) % 7;

                    var format = DPGlobal.parseFormat(o.format);
                    if (o.startDate !== -Infinity){
                            if (!!o.startDate){
                                    if (o.startDate instanceof Date)
                                            o.startDate = this._local_to_utc(this._zero_time(o.startDate));
                                    else
                                            o.startDate = DPGlobal.parseDate(o.startDate, format, o.language, o.assumeNearbyYear);
                            }
                            else {
                                    o.startDate = -Infinity;
                            }
                    }
                    if (o.endDate !== Infinity){
                            if (!!o.endDate){
                                    if (o.endDate instanceof Date)
                                            o.endDate = this._local_to_utc(this._zero_time(o.endDate));
                                    else
                                            o.endDate = DPGlobal.parseDate(o.endDate, format, o.language, o.assumeNearbyYear);
                            }
                            else {
                                    o.endDate = Infinity;
                            }
                    }

                    o.daysOfWeekDisabled = this._resolveDaysOfWeek(o.daysOfWeekDisabled||[]);
                    o.daysOfWeekHighlighted = this._resolveDaysOfWeek(o.daysOfWeekHighlighted||[]);

                    o.datesDisabled = o.datesDisabled||[];
                    if (!$.isArray(o.datesDisabled)) {
                            o.datesDisabled = o.datesDisabled.split(',');
                    }
                    o.datesDisabled = $.map(o.datesDisabled, function(d){
                            return DPGlobal.parseDate(d, format, o.language, o.assumeNearbyYear);
                    });

                    var plc = String(o.orientation).toLowerCase().split(/\s+/g),
                            _plc = o.orientation.toLowerCase();
                    plc = $.grep(plc, function(word){
                            return /^auto|left|right|top|bottom$/.test(word);
                    });
                    o.orientation = {x: 'auto', y: 'auto'};
                    if (!_plc || _plc === 'auto')
                            ; // no action
                    else if (plc.length === 1){
                            switch (plc[0]){
                                    case 'top':
                                    case 'bottom':
                                            o.orientation.y = plc[0];
                                            break;
                                    case 'left':
                                    case 'right':
                                            o.orientation.x = plc[0];
                                            break;
                            }
                    }
                    else {
                            _plc = $.grep(plc, function(word){
                                    return /^left|right$/.test(word);
                            });
                            o.orientation.x = _plc[0] || 'auto';

                            _plc = $.grep(plc, function(word){
                                    return /^top|bottom$/.test(word);
                            });
                            o.orientation.y = _plc[0] || 'auto';
                    }
                    if (o.defaultViewDate instanceof Date || typeof o.defaultViewDate === 'string') {
                            o.defaultViewDate = DPGlobal.parseDate(o.defaultViewDate, format, o.language, o.assumeNearbyYear);
                    } else if (o.defaultViewDate) {
                            var year = o.defaultViewDate.year || new Date().getFullYear();
                            var month = o.defaultViewDate.month || 0;
                            var day = o.defaultViewDate.day || 1;
                            o.defaultViewDate = UTCDate(year, month, day);
                    } else {
                            o.defaultViewDate = UTCToday();
                    }
            },
            _events: [],
            _secondaryEvents: [],
            _applyEvents: function(evs){
                    for (var i=0, el, ch, ev; i < evs.length; i++){
                            el = evs[i][0];
                            if (evs[i].length === 2){
                                    ch = undefined;
                                    ev = evs[i][1];
                            } else if (evs[i].length === 3){
                                    ch = evs[i][1];
                                    ev = evs[i][2];
                            }
                            el.on(ev, ch);
                    }
            },
            _unapplyEvents: function(evs){
                    for (var i=0, el, ev, ch; i < evs.length; i++){
                            el = evs[i][0];
                            if (evs[i].length === 2){
                                    ch = undefined;
                                    ev = evs[i][1];
                            } else if (evs[i].length === 3){
                                    ch = evs[i][1];
                                    ev = evs[i][2];
                            }
                            el.off(ev, ch);
                    }
            },
            _buildEvents: function(){
        var events = {
            keyup: $.proxy(function(e){
                if ($.inArray(e.keyCode, [27, 37, 39, 38, 40, 32, 13, 9]) === -1)
                    this.update();
            }, this),
            keydown: $.proxy(this.keydown, this),
            paste: $.proxy(this.paste, this)
        };

        if (this.o.showOnFocus === true) {
            events.focus = $.proxy(this.show, this);
        }

        if (this.isInput) { // single input
            this._events = [
                [this.element, events]
            ];
        }
        // component: input + button
        else if (this.component && this.inputField.length) {
            this._events = [
                // For components that are not readonly, allow keyboard nav
                [this.inputField, events],
                [this.component, {
                    click: $.proxy(this.show, this)
                }]
            ];
        }
                    else {
                            this._events = [
                                    [this.element, {
                                            click: $.proxy(this.show, this),
                                            keydown: $.proxy(this.keydown, this)
                                    }]
                            ];
                    }
                    this._events.push(
                            // Component: listen for blur on element descendants
                            [this.element, '*', {
                                    blur: $.proxy(function(e){
                                            this._focused_from = e.target;
                                    }, this)
                            }],
                            // Input: listen for blur on element
                            [this.element, {
                                    blur: $.proxy(function(e){
                                            this._focused_from = e.target;
                                    }, this)
                            }]
                    );

                    if (this.o.immediateUpdates) {
                            // Trigger input updates immediately on changed year/month
                            this._events.push([this.element, {
                                    'changeYear changeMonth': $.proxy(function(e){
                                            this.update(e.date);
                                    }, this)
                            }]);
                    }

                    this._secondaryEvents = [
                            [this.picker, {
                                    click: $.proxy(this.click, this)
                            }],
                            [this.picker, '.prev, .next', {
                                    click: $.proxy(this.navArrowsClick, this)
                            }],
                            [this.picker, '.day:not(.disabled)', {
                                    click: $.proxy(this.dayCellClick, this)
                            }],
                            [$(window), {
                                    resize: $.proxy(this.place, this)
                            }],
                            [$(document), {
                                    'mousedown touchstart': $.proxy(function(e){
                                            // Clicked outside the datepicker, hide it
                                            if (!(
                                                    this.element.is(e.target) ||
                                                    this.element.find(e.target).length ||
                                                    this.picker.is(e.target) ||
                                                    this.picker.find(e.target).length ||
                                                    this.isInline
                                            )){
                                                    this.hide();
                                            }
                                    }, this)
                            }]
                    ];
            },
            _attachEvents: function(){
                    this._detachEvents();
                    this._applyEvents(this._events);
            },
            _detachEvents: function(){
                    this._unapplyEvents(this._events);
            },
            _attachSecondaryEvents: function(){
                    this._detachSecondaryEvents();
                    this._applyEvents(this._secondaryEvents);
            },
            _detachSecondaryEvents: function(){
                    this._unapplyEvents(this._secondaryEvents);
            },
            _trigger: function(event, altdate){
                    var date = altdate || this.dates.get(-1),
                            local_date = this._utc_to_local(date);

                    this.element.trigger({
                            type: event,
                            date: local_date,
                            viewMode: this.viewMode,
                            dates: $.map(this.dates, this._utc_to_local),
                            format: $.proxy(function(ix, format){
                                    if (arguments.length === 0){
                                            ix = this.dates.length - 1;
                                            format = this.o.format;
                                    } else if (typeof ix === 'string'){
                                            format = ix;
                                            ix = this.dates.length - 1;
                                    }
                                    format = format || this.o.format;
                                    var date = this.dates.get(ix);
                                    return DPGlobal.formatDate(date, format, this.o.language);
                            }, this)
                    });
            },

            show: function(){
                    if (this.inputField.prop('disabled') || (this.inputField.prop('readonly') && this.o.enableOnReadonly === false))
                            return;
                    if (!this.isInline)
                            this.picker.appendTo(this.o.container);
                    this.place();
                    this.picker.show();
                    this._attachSecondaryEvents();
                    this._trigger('show');
                    if ((window.navigator.msMaxTouchPoints || 'ontouchstart' in document) && this.o.disableTouchKeyboard) {
                            $(this.element).blur();
                    }
                    return this;
            },

            hide: function(){
                    if (this.isInline || !this.picker.is(':visible'))
                            return this;
                    this.focusDate = null;
                    this.picker.hide().detach();
                    this._detachSecondaryEvents();
                    this.setViewMode(this.o.startView);

                    if (this.o.forceParse && this.inputField.val())
                            this.setValue();
                    this._trigger('hide');
                    return this;
            },

            destroy: function(){
                    this.hide();
                    this._detachEvents();
                    this._detachSecondaryEvents();
                    this.picker.remove();
                    delete this.element.data().datepicker;
                    if (!this.isInput){
                            delete this.element.data().date;
                    }
                    return this;
            },

            paste: function(e){
                    var dateString;
                    if (e.originalEvent.clipboardData && e.originalEvent.clipboardData.types
                            && $.inArray('text/plain', e.originalEvent.clipboardData.types) !== -1) {
                            dateString = e.originalEvent.clipboardData.getData('text/plain');
                    } else if (window.clipboardData) {
                            dateString = window.clipboardData.getData('Text');
                    } else {
                            return;
                    }
                    this.setDate(dateString);
                    this.update();
                    e.preventDefault();
            },

            _utc_to_local: function(utc){
                    if (!utc) {
                            return utc;
                    }

                    var local = new Date(utc.getTime() + (utc.getTimezoneOffset() * 60000));

                    if (local.getTimezoneOffset() !== utc.getTimezoneOffset()) {
                            local = new Date(utc.getTime() + (local.getTimezoneOffset() * 60000));
                    }

                    return local;
            },
            _local_to_utc: function(local){
                    return local && new Date(local.getTime() - (local.getTimezoneOffset()*60000));
            },
            _zero_time: function(local){
                    return local && new Date(local.getFullYear(), local.getMonth(), local.getDate());
            },
            _zero_utc_time: function(utc){
                    return utc && UTCDate(utc.getUTCFullYear(), utc.getUTCMonth(), utc.getUTCDate());
            },

            getDates: function(){
                    return $.map(this.dates, this._utc_to_local);
            },

            getUTCDates: function(){
                    return $.map(this.dates, function(d){
                            return new Date(d);
                    });
            },

            getDate: function(){
                    return this._utc_to_local(this.getUTCDate());
            },

            getUTCDate: function(){
                    var selected_date = this.dates.get(-1);
                    if (selected_date !== undefined) {
                            return new Date(selected_date);
                    } else {
                            return null;
                    }
            },

            clearDates: function(){
                    this.inputField.val('');
                    this.update();
                    this._trigger('changeDate');

                    if (this.o.autoclose) {
                            this.hide();
                    }
            },

            setDates: function(){
                    var args = $.isArray(arguments[0]) ? arguments[0] : arguments;
                    this.update.apply(this, args);
                    this._trigger('changeDate');
                    this.setValue();
                    return this;
            },

            setUTCDates: function(){
                    var args = $.isArray(arguments[0]) ? arguments[0] : arguments;
                    this.setDates.apply(this, $.map(args, this._utc_to_local));
                    return this;
            },

            setDate: alias('setDates'),
            setUTCDate: alias('setUTCDates'),
            remove: alias('destroy', 'Method `remove` is deprecated and will be removed in version 2.0. Use `destroy` instead'),

            setValue: function(){
                    var formatted = this.getFormattedDate();
                    this.inputField.val(formatted);
                    return this;
            },

            getFormattedDate: function(format){
                    if (format === undefined)
                            format = this.o.format;

                    var lang = this.o.language;
                    return $.map(this.dates, function(d){
                            return DPGlobal.formatDate(d, format, lang);
                    }).join(this.o.multidateSeparator);
            },

            getStartDate: function(){
                    return this.o.startDate;
            },

            setStartDate: function(startDate){
                    this._process_options({startDate: startDate});
                    this.update();
                    this.updateNavArrows();
                    return this;
            },

            getEndDate: function(){
                    return this.o.endDate;
            },

            setEndDate: function(endDate){
                    this._process_options({endDate: endDate});
                    this.update();
                    this.updateNavArrows();
                    return this;
            },

            setDaysOfWeekDisabled: function(daysOfWeekDisabled){
                    this._process_options({daysOfWeekDisabled: daysOfWeekDisabled});
                    this.update();
                    return this;
            },

            setDaysOfWeekHighlighted: function(daysOfWeekHighlighted){
                    this._process_options({daysOfWeekHighlighted: daysOfWeekHighlighted});
                    this.update();
                    return this;
            },

            setDatesDisabled: function(datesDisabled){
                    this._process_options({datesDisabled: datesDisabled});
                    this.update();
                    return this;
            },

            place: function(){
                    if (this.isInline)
                            return this;
                    var calendarWidth = this.picker.outerWidth(),
                            calendarHeight = this.picker.outerHeight(),
                            visualPadding = 10,
                            container = $(this.o.container),
                            windowWidth = container.width(),
                            scrollTop = this.o.container === 'body' ? $(document).scrollTop() : container.scrollTop(),
                            appendOffset = container.offset();

                    var parentsZindex = [0];
                    this.element.parents().each(function(){
                            var itemZIndex = $(this).css('z-index');
                            if (itemZIndex !== 'auto' && Number(itemZIndex) !== 0) parentsZindex.push(Number(itemZIndex));
                    });
                    var zIndex = Math.max.apply(Math, parentsZindex) + this.o.zIndexOffset;
                    var offset = this.component ? this.component.parent().offset() : this.element.offset();
                    var height = this.component ? this.component.outerHeight(true) : this.element.outerHeight(false);
                    var width = this.component ? this.component.outerWidth(true) : this.element.outerWidth(false);
                    var left = offset.left - appendOffset.left;
                    var top = offset.top - appendOffset.top;

                    if (this.o.container !== 'body') {
                            top += scrollTop;
                    }

                    this.picker.removeClass(
                            'datepicker-orient-top datepicker-orient-bottom '+
                            'datepicker-orient-right datepicker-orient-left'
                    );

                    if (this.o.orientation.x !== 'auto'){
                            this.picker.addClass('datepicker-orient-' + this.o.orientation.x);
                            if (this.o.orientation.x === 'right')
                                    left -= calendarWidth - width;
                    }
                    // auto x orientation is best-placement: if it crosses a window
                    // edge, fudge it sideways
                    else {
                            if (offset.left < 0) {
                                    // component is outside the window on the left side. Move it into visible range
                                    this.picker.addClass('datepicker-orient-left');
                                    left -= offset.left - visualPadding;
                            } else if (left + calendarWidth > windowWidth) {
                                    // the calendar passes the widow right edge. Align it to component right side
                                    this.picker.addClass('datepicker-orient-right');
                                    left += width - calendarWidth;
                            } else {
                                    if (this.o.rtl) {
                                            // Default to right
                                            this.picker.addClass('datepicker-orient-right');
                                    } else {
                                            // Default to left
                                            this.picker.addClass('datepicker-orient-left');
                                    }
                            }
                    }

                    // auto y orientation is best-situation: top or bottom, no fudging,
                    // decision based on which shows more of the calendar
                    var yorient = this.o.orientation.y,
                            top_overflow;
                    if (yorient === 'auto'){
                            top_overflow = -scrollTop + top - calendarHeight;
                            yorient = top_overflow < 0 ? 'bottom' : 'top';
                    }

                    this.picker.addClass('datepicker-orient-' + yorient);
                    if (yorient === 'top')
                            top -= calendarHeight + parseInt(this.picker.css('padding-top'));
                    else
                            top += height;

                    if (this.o.rtl) {
                            var right = windowWidth - (left + width);
                            this.picker.css({
                                    top: top,
                                    right: right,
                                    zIndex: zIndex
                            });
                    } else {
                            this.picker.css({
                                    top: top,
                                    left: left,
                                    zIndex: zIndex
                            });
                    }
                    return this;
            },

            _allow_update: true,
            update: function(){
                    if (!this._allow_update)
                            return this;

                    var oldDates = this.dates.copy(),
                            dates = [],
                            fromArgs = false;
                    if (arguments.length){
                            $.each(arguments, $.proxy(function(i, date){
                                    if (date instanceof Date)
                                            date = this._local_to_utc(date);
                                    dates.push(date);
                            }, this));
                            fromArgs = true;
                    } else {
                            dates = this.isInput
                                            ? this.element.val()
                                            : this.element.data('date') || this.inputField.val();
                            if (dates && this.o.multidate)
                                    dates = dates.split(this.o.multidateSeparator);
                            else
                                    dates = [dates];
                            delete this.element.data().date;
                    }

                    dates = $.map(dates, $.proxy(function(date){
                            return DPGlobal.parseDate(date, this.o.format, this.o.language, this.o.assumeNearbyYear);
                    }, this));
                    dates = $.grep(dates, $.proxy(function(date){
                            return (
                                    !this.dateWithinRange(date) ||
                                    !date
                            );
                    }, this), true);
                    this.dates.replace(dates);

                    if (this.o.updateViewDate) {
                            if (this.dates.length)
                                    this.viewDate = new Date(this.dates.get(-1));
                            else if (this.viewDate < this.o.startDate)
                                    this.viewDate = new Date(this.o.startDate);
                            else if (this.viewDate > this.o.endDate)
                                    this.viewDate = new Date(this.o.endDate);
                            else
                                    this.viewDate = this.o.defaultViewDate;
                    }

                    if (fromArgs){
                            // setting date by clicking
                            this.setValue();
                            this.element.change();
                    }
                    else if (this.dates.length){
                            // setting date by typing
                            if (String(oldDates) !== String(this.dates) && fromArgs) {
                                    this._trigger('changeDate');
                                    this.element.change();
                            }
                    }
                    if (!this.dates.length && oldDates.length) {
                            this._trigger('clearDate');
                            this.element.change();
                    }

                    this.fill();
                    return this;
            },

            fillDow: function(){
  if (this.o.showWeekDays) {
                    var dowCnt = this.o.weekStart,
                            html = '<tr>';
                    if (this.o.calendarWeeks){
                            html += '<th class="cw">&#160;</th>';
                    }
                    while (dowCnt < this.o.weekStart + 7){
                            html += '<th class="dow';
    if ($.inArray(dowCnt, this.o.daysOfWeekDisabled) !== -1)
      html += ' disabled';
    html += '">'+dates[this.o.language].daysMin[(dowCnt++)%7]+'</th>';
                    }
                    html += '</tr>';
                    this.picker.find('.datepicker-days thead').append(html);
  }
            },

            fillMonths: function(){
  var localDate = this._utc_to_local(this.viewDate);
                    var html = '';
                    var focused;
                    for (var i = 0; i < 12; i++){
                            focused = localDate && localDate.getMonth() === i ? ' focused' : '';
                            html += '<span class="month' + focused + '">' + dates[this.o.language].monthsShort[i] + '</span>';
                    }
                    this.picker.find('.datepicker-months td').html(html);
            },

            setRange: function(range){
                    if (!range || !range.length)
                            delete this.range;
                    else
                            this.range = $.map(range, function(d){
                                    return d.valueOf();
                            });
                    this.fill();
            },

            getClassNames: function(date){
                    var cls = [],
                            year = this.viewDate.getUTCFullYear(),
                            month = this.viewDate.getUTCMonth(),
                            today = UTCToday();
                    if (date.getUTCFullYear() < year || (date.getUTCFullYear() === year && date.getUTCMonth() < month)){
                            cls.push('old');
                    } else if (date.getUTCFullYear() > year || (date.getUTCFullYear() === year && date.getUTCMonth() > month)){
                            cls.push('new');
                    }
                    if (this.focusDate && date.valueOf() === this.focusDate.valueOf())
                            cls.push('focused');
                    // Compare internal UTC date with UTC today, not local today
                    if (this.o.todayHighlight && isUTCEquals(date, today)) {
                            cls.push('today');
                    }
                    if (this.dates.contains(date) !== -1)
                            cls.push('active');
                    if (!this.dateWithinRange(date)){
                            cls.push('disabled');
                    }
                    if (this.dateIsDisabled(date)){
                            cls.push('disabled', 'disabled-date');
                    }
                    if ($.inArray(date.getUTCDay(), this.o.daysOfWeekHighlighted) !== -1){
                            cls.push('highlighted');
                    }

                    if (this.range){
                            if (date > this.range[0] && date < this.range[this.range.length-1]){
                                    cls.push('range');
                            }
                            if ($.inArray(date.valueOf(), this.range) !== -1){
                                    cls.push('selected');
                            }
                            if (date.valueOf() === this.range[0]){
      cls.push('range-start');
    }
    if (date.valueOf() === this.range[this.range.length-1]){
      cls.push('range-end');
    }
                    }
                    return cls;
            },

            _fill_yearsView: function(selector, cssClass, factor, year, startYear, endYear, beforeFn){
                    var html = '';
                    var step = factor / 10;
                    var view = this.picker.find(selector);
                    var startVal = Math.floor(year / factor) * factor;
                    var endVal = startVal + step * 9;
                    var focusedVal = Math.floor(this.viewDate.getFullYear() / step) * step;
                    var selected = $.map(this.dates, function(d){
                            return Math.floor(d.getUTCFullYear() / step) * step;
                    });

                    var classes, tooltip, before;
                    for (var currVal = startVal - step; currVal <= endVal + step; currVal += step) {
                            classes = [cssClass];
                            tooltip = null;

                            if (currVal === startVal - step) {
                                    classes.push('old');
                            } else if (currVal === endVal + step) {
                                    classes.push('new');
                            }
                            if ($.inArray(currVal, selected) !== -1) {
                                    classes.push('active');
                            }
                            if (currVal < startYear || currVal > endYear) {
                                    classes.push('disabled');
                            }
                            if (currVal === focusedVal) {
                              classes.push('focused');
    }

                            if (beforeFn !== $.noop) {
                                    before = beforeFn(new Date(currVal, 0, 1));
                                    if (before === undefined) {
                                            before = {};
                                    } else if (typeof before === 'boolean') {
                                            before = {enabled: before};
                                    } else if (typeof before === 'string') {
                                            before = {classes: before};
                                    }
                                    if (before.enabled === false) {
                                            classes.push('disabled');
                                    }
                                    if (before.classes) {
                                            classes = classes.concat(before.classes.split(/\s+/));
                                    }
                                    if (before.tooltip) {
                                            tooltip = before.tooltip;
                                    }
                            }

                            html += '<span class="' + classes.join(' ') + '"' + (tooltip ? ' title="' + tooltip + '"' : '') + '>' + currVal + '</span>';
                    }

                    view.find('.datepicker-switch').text(startVal + '-' + endVal);
                    view.find('td').html(html);
            },

            fill: function(){
                    var d = new Date(this.viewDate),
                            year = d.getUTCFullYear(),
                            month = d.getUTCMonth(),
                            startYear = this.o.startDate !== -Infinity ? this.o.startDate.getUTCFullYear() : -Infinity,
                            startMonth = this.o.startDate !== -Infinity ? this.o.startDate.getUTCMonth() : -Infinity,
                            endYear = this.o.endDate !== Infinity ? this.o.endDate.getUTCFullYear() : Infinity,
                            endMonth = this.o.endDate !== Infinity ? this.o.endDate.getUTCMonth() : Infinity,
                            todaytxt = dates[this.o.language].today || dates['en'].today || '',
                            cleartxt = dates[this.o.language].clear || dates['en'].clear || '',
                            titleFormat = dates[this.o.language].titleFormat || dates['en'].titleFormat,
                            tooltip,
                            before;
                    if (isNaN(year) || isNaN(month))
                            return;
                    this.picker.find('.datepicker-days .datepicker-switch')
                                            .text(DPGlobal.formatDate(d, titleFormat, this.o.language));
                    this.picker.find('tfoot .today')
                                            .text(todaytxt)
                                            .css('display', this.o.todayBtn === true || this.o.todayBtn === 'linked' ? 'table-cell' : 'none');
                    this.picker.find('tfoot .clear')
                                            .text(cleartxt)
                                            .css('display', this.o.clearBtn === true ? 'table-cell' : 'none');
                    this.picker.find('thead .datepicker-title')
                                            .text(this.o.title)
                                            .css('display', typeof this.o.title === 'string' && this.o.title !== '' ? 'table-cell' : 'none');
                    this.updateNavArrows();
                    this.fillMonths();
                    var prevMonth = UTCDate(year, month, 0),
                            day = prevMonth.getUTCDate();
                    prevMonth.setUTCDate(day - (prevMonth.getUTCDay() - this.o.weekStart + 7)%7);
                    var nextMonth = new Date(prevMonth);
                    if (prevMonth.getUTCFullYear() < 100){
    nextMonth.setUTCFullYear(prevMonth.getUTCFullYear());
  }
                    nextMonth.setUTCDate(nextMonth.getUTCDate() + 42);
                    nextMonth = nextMonth.valueOf();
                    var html = [];
                    var weekDay, clsName;
                    while (prevMonth.valueOf() < nextMonth){
                            weekDay = prevMonth.getUTCDay();
                            if (weekDay === this.o.weekStart){
                                    html.push('<tr>');
                                    if (this.o.calendarWeeks){
                                            // ISO 8601: First week contains first thursday.
                                            // ISO also states week starts on Monday, but we can be more abstract here.
                                            var
                                                    // Start of current week: based on weekstart/current date
                                                    ws = new Date(+prevMonth + (this.o.weekStart - weekDay - 7) % 7 * 864e5),
                                                    // Thursday of this week
                                                    th = new Date(Number(ws) + (7 + 4 - ws.getUTCDay()) % 7 * 864e5),
                                                    // First Thursday of year, year from thursday
                                                    yth = new Date(Number(yth = UTCDate(th.getUTCFullYear(), 0, 1)) + (7 + 4 - yth.getUTCDay()) % 7 * 864e5),
                                                    // Calendar week: ms between thursdays, div ms per day, div 7 days
                                                    calWeek = (th - yth) / 864e5 / 7 + 1;
                                            html.push('<td class="cw">'+ calWeek +'</td>');
                                    }
                            }
                            clsName = this.getClassNames(prevMonth);
                            clsName.push('day');

                            var content = prevMonth.getUTCDate();

                            if (this.o.beforeShowDay !== $.noop){
                                    before = this.o.beforeShowDay(this._utc_to_local(prevMonth));
                                    if (before === undefined)
                                            before = {};
                                    else if (typeof before === 'boolean')
                                            before = {enabled: before};
                                    else if (typeof before === 'string')
                                            before = {classes: before};
                                    if (before.enabled === false)
                                            clsName.push('disabled');
                                    if (before.classes)
                                            clsName = clsName.concat(before.classes.split(/\s+/));
                                    if (before.tooltip)
                                            tooltip = before.tooltip;
                                    if (before.content)
                                            content = before.content;
                            }

                            //Check if uniqueSort exists (supported by jquery >=1.12 and >=2.2)
                            //Fallback to unique function for older jquery versions
                            if ($.isFunction($.uniqueSort)) {
                                    clsName = $.uniqueSort(clsName);
                            } else {
                                    clsName = $.unique(clsName);
                            }

                            html.push('<td class="'+clsName.join(' ')+'"' + (tooltip ? ' title="'+tooltip+'"' : '') + ' data-date="' + prevMonth.getTime().toString() + '">' + content + '</td>');
                            tooltip = null;
                            if (weekDay === this.o.weekEnd){
                                    html.push('</tr>');
                            }
                            prevMonth.setUTCDate(prevMonth.getUTCDate() + 1);
                    }
                    this.picker.find('.datepicker-days tbody').html(html.join(''));

                    var monthsTitle = dates[this.o.language].monthsTitle || dates['en'].monthsTitle || 'Months';
                    var months = this.picker.find('.datepicker-months')
                                            .find('.datepicker-switch')
                                                    .text(this.o.maxViewMode < 2 ? monthsTitle : year)
                                                    .end()
                                            .find('tbody span').removeClass('active');

                    $.each(this.dates, function(i, d){
                            if (d.getUTCFullYear() === year)
                                    months.eq(d.getUTCMonth()).addClass('active');
                    });

                    if (year < startYear || year > endYear){
                            months.addClass('disabled');
                    }
                    if (year === startYear){
                            months.slice(0, startMonth).addClass('disabled');
                    }
                    if (year === endYear){
                            months.slice(endMonth+1).addClass('disabled');
                    }

                    if (this.o.beforeShowMonth !== $.noop){
                            var that = this;
                            $.each(months, function(i, month){
      var moDate = new Date(year, i, 1);
      var before = that.o.beforeShowMonth(moDate);
                                    if (before === undefined)
                                            before = {};
                                    else if (typeof before === 'boolean')
                                            before = {enabled: before};
                                    else if (typeof before === 'string')
                                            before = {classes: before};
                                    if (before.enabled === false && !$(month).hasClass('disabled'))
                                        $(month).addClass('disabled');
                                    if (before.classes)
                                        $(month).addClass(before.classes);
                                    if (before.tooltip)
                                        $(month).prop('title', before.tooltip);
                            });
                    }

                    // Generating decade/years picker
                    this._fill_yearsView(
                            '.datepicker-years',
                            'year',
                            10,
                            year,
                            startYear,
                            endYear,
                            this.o.beforeShowYear
                    );

                    // Generating century/decades picker
                    this._fill_yearsView(
                            '.datepicker-decades',
                            'decade',
                            100,
                            year,
                            startYear,
                            endYear,
                            this.o.beforeShowDecade
                    );

                    // Generating millennium/centuries picker
                    this._fill_yearsView(
                            '.datepicker-centuries',
                            'century',
                            1000,
                            year,
                            startYear,
                            endYear,
                            this.o.beforeShowCentury
                    );
            },

            updateNavArrows: function(){
                    if (!this._allow_update)
                            return;

                    var d = new Date(this.viewDate),
                            year = d.getUTCFullYear(),
                            month = d.getUTCMonth(),
                            startYear = this.o.startDate !== -Infinity ? this.o.startDate.getUTCFullYear() : -Infinity,
                            startMonth = this.o.startDate !== -Infinity ? this.o.startDate.getUTCMonth() : -Infinity,
                            endYear = this.o.endDate !== Infinity ? this.o.endDate.getUTCFullYear() : Infinity,
                            endMonth = this.o.endDate !== Infinity ? this.o.endDate.getUTCMonth() : Infinity,
                            prevIsDisabled,
                            nextIsDisabled,
                            factor = 1;
                    switch (this.viewMode){
                            case 0:
                                    prevIsDisabled = year <= startYear && month <= startMonth;
                                    nextIsDisabled = year >= endYear && month >= endMonth;
                                    break;
                            case 4:
                                    factor *= 10;
                                    /* falls through */
                            case 3:
                                    factor *= 10;
                                    /* falls through */
                            case 2:
                                    factor *= 10;
                                    /* falls through */
                            case 1:
                                    prevIsDisabled = Math.floor(year / factor) * factor <= startYear;
                                    nextIsDisabled = Math.floor(year / factor) * factor + factor >= endYear;
                                    break;
                    }

                    this.picker.find('.prev').toggleClass('disabled', prevIsDisabled);
                    this.picker.find('.next').toggleClass('disabled', nextIsDisabled);
            },

            click: function(e){
                    e.preventDefault();
                    e.stopPropagation();

                    var target, dir, day, year, month;
                    target = $(e.target);

                    // Clicked on the switch
                    if (target.hasClass('datepicker-switch') && this.viewMode !== this.o.maxViewMode){
                            this.setViewMode(this.viewMode + 1);
                    }

                    // Clicked on today button
                    if (target.hasClass('today') && !target.hasClass('day')){
                            this.setViewMode(0);
                            this._setDate(UTCToday(), this.o.todayBtn === 'linked' ? null : 'view');
                    }

                    // Clicked on clear button
                    if (target.hasClass('clear')){
                            this.clearDates();
                    }

                    if (!target.hasClass('disabled')){
                            // Clicked on a month, year, decade, century
                            if (target.hasClass('month')
                                            || target.hasClass('year')
                                            || target.hasClass('decade')
                                            || target.hasClass('century')) {
                                    this.viewDate.setUTCDate(1);

                                    day = 1;
                                    if (this.viewMode === 1){
                                            month = target.parent().find('span').index(target);
                                            year = this.viewDate.getUTCFullYear();
                                            this.viewDate.setUTCMonth(month);
                                    } else {
                                            month = 0;
                                            year = Number(target.text());
                                            this.viewDate.setUTCFullYear(year);
                                    }

                                    this._trigger(DPGlobal.viewModes[this.viewMode - 1].e, this.viewDate);

                                    if (this.viewMode === this.o.minViewMode){
                                            this._setDate(UTCDate(year, month, day));
                                    } else {
                                            this.setViewMode(this.viewMode - 1);
                                            this.fill();
                                    }
                            }
                    }

                    if (this.picker.is(':visible') && this._focused_from){
                            this._focused_from.focus();
                    }
                    delete this._focused_from;
            },

            dayCellClick: function(e){
                    var $target = $(e.currentTarget);
                    var timestamp = $target.data('date');
                    var date = new Date(timestamp);

                    if (this.o.updateViewDate) {
                            if (date.getUTCFullYear() !== this.viewDate.getUTCFullYear()) {
                                    this._trigger('changeYear', this.viewDate);
                            }

                            if (date.getUTCMonth() !== this.viewDate.getUTCMonth()) {
                                    this._trigger('changeMonth', this.viewDate);
                            }
                    }
                    this._setDate(date);
            },

            // Clicked on prev or next
            navArrowsClick: function(e){
                    var $target = $(e.currentTarget);
                    var dir = $target.hasClass('prev') ? -1 : 1;
                    if (this.viewMode !== 0){
                            dir *= DPGlobal.viewModes[this.viewMode].navStep * 12;
                    }
                    this.viewDate = this.moveMonth(this.viewDate, dir);
                    this._trigger(DPGlobal.viewModes[this.viewMode].e, this.viewDate);
                    this.fill();
            },

            _toggle_multidate: function(date){
                    var ix = this.dates.contains(date);
                    if (!date){
                            this.dates.clear();
                    }

                    if (ix !== -1){
                            if (this.o.multidate === true || this.o.multidate > 1 || this.o.toggleActive){
                                    this.dates.remove(ix);
                            }
                    } else if (this.o.multidate === false) {
                            this.dates.clear();
                            this.dates.push(date);
                    }
                    else {
                            this.dates.push(date);
                    }

                    if (typeof this.o.multidate === 'number')
                            while (this.dates.length > this.o.multidate)
                                    this.dates.remove(0);
            },

            _setDate: function(date, which){
                    if (!which || which === 'date')
                            this._toggle_multidate(date && new Date(date));
                    if ((!which && this.o.updateViewDate) || which === 'view')
                            this.viewDate = date && new Date(date);

                    this.fill();
                    this.setValue();
                    if (!which || which !== 'view') {
                            this._trigger('changeDate');
                    }
                    this.inputField.trigger('change');
                    if (this.o.autoclose && (!which || which === 'date')){
                            this.hide();
                    }
            },

            moveDay: function(date, dir){
                    var newDate = new Date(date);
                    newDate.setUTCDate(date.getUTCDate() + dir);

                    return newDate;
            },

            moveWeek: function(date, dir){
                    return this.moveDay(date, dir * 7);
            },

            moveMonth: function(date, dir){
                    if (!isValidDate(date))
                            return this.o.defaultViewDate;
                    if (!dir)
                            return date;
                    var new_date = new Date(date.valueOf()),
                            day = new_date.getUTCDate(),
                            month = new_date.getUTCMonth(),
                            mag = Math.abs(dir),
                            new_month, test;
                    dir = dir > 0 ? 1 : -1;
                    if (mag === 1){
                            test = dir === -1
                                    // If going back one month, make sure month is not current month
                                    // (eg, Mar 31 -> Feb 31 == Feb 28, not Mar 02)
                                    ? function(){
                                            return new_date.getUTCMonth() === month;
                                    }
                                    // If going forward one month, make sure month is as expected
                                    // (eg, Jan 31 -> Feb 31 == Feb 28, not Mar 02)
                                    : function(){
                                            return new_date.getUTCMonth() !== new_month;
                                    };
                            new_month = month + dir;
                            new_date.setUTCMonth(new_month);
                            // Dec -> Jan (12) or Jan -> Dec (-1) -- limit expected date to 0-11
                            new_month = (new_month + 12) % 12;
                    }
                    else {
                            // For magnitudes >1, move one month at a time...
                            for (var i=0; i < mag; i++)
                                    // ...which might decrease the day (eg, Jan 31 to Feb 28, etc)...
                                    new_date = this.moveMonth(new_date, dir);
                            // ...then reset the day, keeping it in the new month
                            new_month = new_date.getUTCMonth();
                            new_date.setUTCDate(day);
                            test = function(){
                                    return new_month !== new_date.getUTCMonth();
                            };
                    }
                    // Common date-resetting loop -- if date is beyond end of month, make it
                    // end of month
                    while (test()){
                            new_date.setUTCDate(--day);
                            new_date.setUTCMonth(new_month);
                    }
                    return new_date;
            },

            moveYear: function(date, dir){
                    return this.moveMonth(date, dir*12);
            },

            moveAvailableDate: function(date, dir, fn){
                    do {
                            date = this[fn](date, dir);

                            if (!this.dateWithinRange(date))
                                    return false;

                            fn = 'moveDay';
                    }
                    while (this.dateIsDisabled(date));

                    return date;
            },

            weekOfDateIsDisabled: function(date){
                    return $.inArray(date.getUTCDay(), this.o.daysOfWeekDisabled) !== -1;
            },

            dateIsDisabled: function(date){
                    return (
                            this.weekOfDateIsDisabled(date) ||
                            $.grep(this.o.datesDisabled, function(d){
                                    return isUTCEquals(date, d);
                            }).length > 0
                    );
            },

            dateWithinRange: function(date){
                    return date >= this.o.startDate && date <= this.o.endDate;
            },

            keydown: function(e){
                    if (!this.picker.is(':visible')){
                            if (e.keyCode === 40 || e.keyCode === 27) { // allow down to re-show picker
                                    this.show();
                                    e.stopPropagation();
    }
                            return;
                    }
                    var dateChanged = false,
                            dir, newViewDate,
                            focusDate = this.focusDate || this.viewDate;
                    switch (e.keyCode){
                            case 27: // escape
                                    if (this.focusDate){
                                            this.focusDate = null;
                                            this.viewDate = this.dates.get(-1) || this.viewDate;
                                            this.fill();
                                    }
                                    else
                                            this.hide();
                                    e.preventDefault();
                                    e.stopPropagation();
                                    break;
                            case 37: // left
                            case 38: // up
                            case 39: // right
                            case 40: // down
                                    if (!this.o.keyboardNavigation || this.o.daysOfWeekDisabled.length === 7)
                                            break;
                                    dir = e.keyCode === 37 || e.keyCode === 38 ? -1 : 1;
      if (this.viewMode === 0) {
                                    if (e.ctrlKey){
                                            newViewDate = this.moveAvailableDate(focusDate, dir, 'moveYear');

                                            if (newViewDate)
                                                    this._trigger('changeYear', this.viewDate);
                                    } else if (e.shiftKey){
                                            newViewDate = this.moveAvailableDate(focusDate, dir, 'moveMonth');

                                            if (newViewDate)
                                                    this._trigger('changeMonth', this.viewDate);
                                    } else if (e.keyCode === 37 || e.keyCode === 39){
                                            newViewDate = this.moveAvailableDate(focusDate, dir, 'moveDay');
                                    } else if (!this.weekOfDateIsDisabled(focusDate)){
                                            newViewDate = this.moveAvailableDate(focusDate, dir, 'moveWeek');
                                    }
      } else if (this.viewMode === 1) {
        if (e.keyCode === 38 || e.keyCode === 40) {
          dir = dir * 4;
        }
        newViewDate = this.moveAvailableDate(focusDate, dir, 'moveMonth');
      } else if (this.viewMode === 2) {
        if (e.keyCode === 38 || e.keyCode === 40) {
          dir = dir * 4;
        }
        newViewDate = this.moveAvailableDate(focusDate, dir, 'moveYear');
      }
                                    if (newViewDate){
                                            this.focusDate = this.viewDate = newViewDate;
                                            this.setValue();
                                            this.fill();
                                            e.preventDefault();
                                    }
                                    break;
                            case 13: // enter
                                    if (!this.o.forceParse)
                                            break;
                                    focusDate = this.focusDate || this.dates.get(-1) || this.viewDate;
                                    if (this.o.keyboardNavigation) {
                                            this._toggle_multidate(focusDate);
                                            dateChanged = true;
                                    }
                                    this.focusDate = null;
                                    this.viewDate = this.dates.get(-1) || this.viewDate;
                                    this.setValue();
                                    this.fill();
                                    if (this.picker.is(':visible')){
                                            e.preventDefault();
                                            e.stopPropagation();
                                            if (this.o.autoclose)
                                                    this.hide();
                                    }
                                    break;
                            case 9: // tab
                                    this.focusDate = null;
                                    this.viewDate = this.dates.get(-1) || this.viewDate;
                                    this.fill();
                                    this.hide();
                                    break;
                    }
                    if (dateChanged){
                            if (this.dates.length)
                                    this._trigger('changeDate');
                            else
                                    this._trigger('clearDate');
                            this.inputField.trigger('change');
                    }
            },

            setViewMode: function(viewMode){
                    this.viewMode = viewMode;
                    this.picker
                            .children('div')
                            .hide()
                            .filter('.datepicker-' + DPGlobal.viewModes[this.viewMode].clsName)
                                    .show();
                    this.updateNavArrows();
  this._trigger('changeViewMode', new Date(this.viewDate));
            }
    };

    var DateRangePicker = function(element, options){
            $.data(element, 'datepicker', this);
            this.element = $(element);
            this.inputs = $.map(options.inputs, function(i){
                    return i.jquery ? i[0] : i;
            });
            delete options.inputs;

            this.keepEmptyValues = options.keepEmptyValues;
            delete options.keepEmptyValues;

            datepickerPlugin.call($(this.inputs), options)
                    .on('changeDate', $.proxy(this.dateUpdated, this));

            this.pickers = $.map(this.inputs, function(i){
                    return $.data(i, 'datepicker');
            });
            this.updateDates();
    };
    DateRangePicker.prototype = {
            updateDates: function(){
                    this.dates = $.map(this.pickers, function(i){
                            return i.getUTCDate();
                    });
                    this.updateRanges();
            },
            updateRanges: function(){
                    var range = $.map(this.dates, function(d){
                            return d.valueOf();
                    });
                    $.each(this.pickers, function(i, p){
                            p.setRange(range);
                    });
            },
            dateUpdated: function(e){
                    // `this.updating` is a workaround for preventing infinite recursion
                    // between `changeDate` triggering and `setUTCDate` calling.  Until
                    // there is a better mechanism.
                    if (this.updating)
                            return;
                    this.updating = true;

                    var dp = $.data(e.target, 'datepicker');

                    if (dp === undefined) {
                            return;
                    }

                    var new_date = dp.getUTCDate(),
                            keep_empty_values = this.keepEmptyValues,
                            i = $.inArray(e.target, this.inputs),
                            j = i - 1,
                            k = i + 1,
                            l = this.inputs.length;
                    if (i === -1)
                            return;

                    $.each(this.pickers, function(i, p){
                            if (!p.getUTCDate() && (p === dp || !keep_empty_values))
                                    p.setUTCDate(new_date);
                    });

                    if (new_date < this.dates[j]){
                            // Date being moved earlier/left
                            while (j >= 0 && new_date < this.dates[j]){
                                    this.pickers[j--].setUTCDate(new_date);
                            }
                    } else if (new_date > this.dates[k]){
                            // Date being moved later/right
                            while (k < l && new_date > this.dates[k]){
                                    this.pickers[k++].setUTCDate(new_date);
                            }
                    }
                    this.updateDates();

                    delete this.updating;
            },
            destroy: function(){
                    $.map(this.pickers, function(p){ p.destroy(); });
                    $(this.inputs).off('changeDate', this.dateUpdated);
                    delete this.element.data().datepicker;
            },
            remove: alias('destroy', 'Method `remove` is deprecated and will be removed in version 2.0. Use `destroy` instead')
    };

    function opts_from_el(el, prefix){
            // Derive options from element data-attrs
            var data = $(el).data(),
                    out = {}, inkey,
                    replace = new RegExp('^' + prefix.toLowerCase() + '([A-Z])');
            prefix = new RegExp('^' + prefix.toLowerCase());
            function re_lower(_,a){
                    return a.toLowerCase();
            }
            for (var key in data)
                    if (prefix.test(key)){
                            inkey = key.replace(replace, re_lower);
                            out[inkey] = data[key];
                    }
            return out;
    }

    function opts_from_locale(lang){
            // Derive options from locale plugins
            var out = {};
            // Check if "de-DE" style date is available, if not language should
            // fallback to 2 letter code eg "de"
            if (!dates[lang]){
                    lang = lang.split('-')[0];
                    if (!dates[lang])
                            return;
            }
            var d = dates[lang];
            $.each(locale_opts, function(i,k){
                    if (k in d)
                            out[k] = d[k];
            });
            return out;
    }

    var old = $.fn.datepicker;
    var datepickerPlugin = function(option){
            var args = Array.apply(null, arguments);
            args.shift();
            var internal_return;
            this.each(function(){
                    var $this = $(this),
                            data = $this.data('datepicker'),
                            options = typeof option === 'object' && option;
                    if (!data){
                            var elopts = opts_from_el(this, 'date'),
                                    // Preliminary otions
                                    xopts = $.extend({}, defaults, elopts, options),
                                    locopts = opts_from_locale(xopts.language),
                                    // Options priority: js args, data-attrs, locales, defaults
                                    opts = $.extend({}, defaults, locopts, elopts, options);
                            if ($this.hasClass('input-daterange') || opts.inputs){
                                    $.extend(opts, {
                                            inputs: opts.inputs || $this.find('input').toArray()
                                    });
                                    data = new DateRangePicker(this, opts);
                            }
                            else {
                                    data = new Datepicker(this, opts);
                            }
                            $this.data('datepicker', data);
                    }
                    if (typeof option === 'string' && typeof data[option] === 'function'){
                            internal_return = data[option].apply(data, args);
                    }
            });

            if (
                    internal_return === undefined ||
                    internal_return instanceof Datepicker ||
                    internal_return instanceof DateRangePicker
            )
                    return this;

            if (this.length > 1)
                    throw new Error('Using only allowed for the collection of a single element (' + option + ' function)');
            else
                    return internal_return;
    };
    $.fn.datepicker = datepickerPlugin;

    var defaults = $.fn.datepicker.defaults = {
            assumeNearbyYear: false,
            autoclose: false,
            beforeShowDay: $.noop,
            beforeShowMonth: $.noop,
            beforeShowYear: $.noop,
            beforeShowDecade: $.noop,
            beforeShowCentury: $.noop,
            calendarWeeks: false,
            clearBtn: false,
            toggleActive: false,
            daysOfWeekDisabled: [],
            daysOfWeekHighlighted: [],
            datesDisabled: [],
            endDate: Infinity,
            forceParse: true,
            format: 'mm/dd/yyyy',
            keepEmptyValues: false,
            keyboardNavigation: true,
            language: 'en',
            minViewMode: 0,
            maxViewMode: 4,
            multidate: false,
            multidateSeparator: ',',
            orientation: "auto",
            rtl: false,
            startDate: -Infinity,
            startView: 0,
            todayBtn: false,
            todayHighlight: false,
            updateViewDate: true,
            weekStart: 0,
            disableTouchKeyboard: false,
            enableOnReadonly: true,
            showOnFocus: true,
            zIndexOffset: 10,
            container: 'body',
            immediateUpdates: false,
            title: '',
            templates: {
                    leftArrow: '&#x00AB;',
                    rightArrow: '&#x00BB;'
            },
showWeekDays: true
    };
    var locale_opts = $.fn.datepicker.locale_opts = [
            'format',
            'rtl',
            'weekStart'
    ];
    $.fn.datepicker.Constructor = Datepicker;
    var dates = $.fn.datepicker.dates = {
            en: {
                    days: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"],
                    daysShort: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"],
                    daysMin: ["Su", "Mo", "Tu", "We", "Th", "Fr", "Sa"],
                    months: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],
                    monthsShort: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"],
                    today: "Today",
                    clear: "Clear",
                    titleFormat: "MM yyyy"
            }
    };

    var DPGlobal = {
            viewModes: [
                    {
                            names: ['days', 'month'],
                            clsName: 'days',
                            e: 'changeMonth'
                    },
                    {
                            names: ['months', 'year'],
                            clsName: 'months',
                            e: 'changeYear',
                            navStep: 1
                    },
                    {
                            names: ['years', 'decade'],
                            clsName: 'years',
                            e: 'changeDecade',
                            navStep: 10
                    },
                    {
                            names: ['decades', 'century'],
                            clsName: 'decades',
                            e: 'changeCentury',
                            navStep: 100
                    },
                    {
                            names: ['centuries', 'millennium'],
                            clsName: 'centuries',
                            e: 'changeMillennium',
                            navStep: 1000
                    }
            ],
            validParts: /dd?|DD?|mm?|MM?|yy(?:yy)?/g,
            nonpunctuation: /[^ -\/:-@\u5e74\u6708\u65e5\[-`{-~\t\n\r]+/g,
            parseFormat: function(format){
                    if (typeof format.toValue === 'function' && typeof format.toDisplay === 'function')
            return format;
        // IE treats \0 as a string end in inputs (truncating the value),
                    // so it's a bad format delimiter, anyway
                    var separators = format.replace(this.validParts, '\0').split('\0'),
                            parts = format.match(this.validParts);
                    if (!separators || !separators.length || !parts || parts.length === 0){
                            throw new Error("Invalid date format.");
                    }
                    return {separators: separators, parts: parts};
            },
            parseDate: function(date, format, language, assumeNearby){
                    if (!date)
                            return undefined;
                    if (date instanceof Date)
                            return date;
                    if (typeof format === 'string')
                            format = DPGlobal.parseFormat(format);
                    if (format.toValue)
                            return format.toValue(date, format, language);
                    var fn_map = {
                                    d: 'moveDay',
                                    m: 'moveMonth',
                                    w: 'moveWeek',
                                    y: 'moveYear'
                            },
                            dateAliases = {
                                    yesterday: '-1d',
                                    today: '+0d',
                                    tomorrow: '+1d'
                            },
                            parts, part, dir, i, fn;
                    if (date in dateAliases){
                            date = dateAliases[date];
                    }
                    if (/^[\-+]\d+[dmwy]([\s,]+[\-+]\d+[dmwy])*$/i.test(date)){
                            parts = date.match(/([\-+]\d+)([dmwy])/gi);
                            date = new Date();
                            for (i=0; i < parts.length; i++){
                                    part = parts[i].match(/([\-+]\d+)([dmwy])/i);
                                    dir = Number(part[1]);
                                    fn = fn_map[part[2].toLowerCase()];
                                    date = Datepicker.prototype[fn](date, dir);
                            }
                            return Datepicker.prototype._zero_utc_time(date);
                    }

                    parts = date && date.match(this.nonpunctuation) || [];

                    function applyNearbyYear(year, threshold){
                            if (threshold === true)
                                    threshold = 10;

                            // if year is 2 digits or less, than the user most likely is trying to get a recent century
                            if (year < 100){
                                    year += 2000;
                                    // if the new year is more than threshold years in advance, use last century
                                    if (year > ((new Date()).getFullYear()+threshold)){
                                            year -= 100;
                                    }
                            }

                            return year;
                    }

                    var parsed = {},
                            setters_order = ['yyyy', 'yy', 'M', 'MM', 'm', 'mm', 'd', 'dd'],
                            setters_map = {
                                    yyyy: function(d,v){
                                            return d.setUTCFullYear(assumeNearby ? applyNearbyYear(v, assumeNearby) : v);
                                    },
                                    m: function(d,v){
                                            if (isNaN(d))
                                                    return d;
                                            v -= 1;
                                            while (v < 0) v += 12;
                                            v %= 12;
                                            d.setUTCMonth(v);
                                            while (d.getUTCMonth() !== v)
                                                    d.setUTCDate(d.getUTCDate()-1);
                                            return d;
                                    },
                                    d: function(d,v){
                                            return d.setUTCDate(v);
                                    }
                            },
                            val, filtered;
                    setters_map['yy'] = setters_map['yyyy'];
                    setters_map['M'] = setters_map['MM'] = setters_map['mm'] = setters_map['m'];
                    setters_map['dd'] = setters_map['d'];
                    date = UTCToday();
                    var fparts = format.parts.slice();
                    // Remove noop parts
                    if (parts.length !== fparts.length){
                            fparts = $(fparts).filter(function(i,p){
                                    return $.inArray(p, setters_order) !== -1;
                            }).toArray();
                    }
                    // Process remainder
                    function match_part(){
                            var m = this.slice(0, parts[i].length),
                                    p = parts[i].slice(0, m.length);
                            return m.toLowerCase() === p.toLowerCase();
                    }
                    if (parts.length === fparts.length){
                            var cnt;
                            for (i=0, cnt = fparts.length; i < cnt; i++){
                                    val = parseInt(parts[i], 10);
                                    part = fparts[i];
                                    if (isNaN(val)){
                                            switch (part){
                                                    case 'MM':
                                                            filtered = $(dates[language].months).filter(match_part);
                                                            val = $.inArray(filtered[0], dates[language].months) + 1;
                                                            break;
                                                    case 'M':
                                                            filtered = $(dates[language].monthsShort).filter(match_part);
                                                            val = $.inArray(filtered[0], dates[language].monthsShort) + 1;
                                                            break;
                                            }
                                    }
                                    parsed[part] = val;
                            }
                            var _date, s;
                            for (i=0; i < setters_order.length; i++){
                                    s = setters_order[i];
                                    if (s in parsed && !isNaN(parsed[s])){
                                            _date = new Date(date);
                                            setters_map[s](_date, parsed[s]);
                                            if (!isNaN(_date))
                                                    date = _date;
                                    }
                            }
                    }
                    return date;
            },
            formatDate: function(date, format, language){
                    if (!date)
                            return '';
                    if (typeof format === 'string')
                            format = DPGlobal.parseFormat(format);
                    if (format.toDisplay)
            return format.toDisplay(date, format, language);
        var val = {
                            d: date.getUTCDate(),
                            D: dates[language].daysShort[date.getUTCDay()],
                            DD: dates[language].days[date.getUTCDay()],
                            m: date.getUTCMonth() + 1,
                            M: dates[language].monthsShort[date.getUTCMonth()],
                            MM: dates[language].months[date.getUTCMonth()],
                            yy: date.getUTCFullYear().toString().substring(2),
                            yyyy: date.getUTCFullYear()
                    };
                    val.dd = (val.d < 10 ? '0' : '') + val.d;
                    val.mm = (val.m < 10 ? '0' : '') + val.m;
                    date = [];
                    var seps = $.extend([], format.separators);
                    for (var i=0, cnt = format.parts.length; i <= cnt; i++){
                            if (seps.length)
                                    date.push(seps.shift());
                            date.push(val[format.parts[i]]);
                    }
                    return date.join('');
            },
            headTemplate: '<thead>'+
                                  '<tr>'+
                                    '<th colspan="7" class="datepicker-title"></th>'+
                                  '</tr>'+
                                                    '<tr>'+
                                                            '<th class="prev">'+defaults.templates.leftArrow+'</th>'+
                                                            '<th colspan="5" class="datepicker-switch"></th>'+
                                                            '<th class="next">'+defaults.templates.rightArrow+'</th>'+
                                                    '</tr>'+
                                            '</thead>',
            contTemplate: '<tbody><tr><td colspan="7"></td></tr></tbody>',
            footTemplate: '<tfoot>'+
                                                    '<tr>'+
                                                            '<th colspan="7" class="today"></th>'+
                                                    '</tr>'+
                                                    '<tr>'+
                                                            '<th colspan="7" class="clear"></th>'+
                                                    '</tr>'+
                                            '</tfoot>'
    };
    DPGlobal.template = '<div class="datepicker">'+
                                                    '<div class="datepicker-days">'+
                                                            '<table class="table-condensed">'+
                                                                    DPGlobal.headTemplate+
                                                                    '<tbody></tbody>'+
                                                                    DPGlobal.footTemplate+
                                                            '</table>'+
                                                    '</div>'+
                                                    '<div class="datepicker-months">'+
                                                            '<table class="table-condensed">'+
                                                                    DPGlobal.headTemplate+
                                                                    DPGlobal.contTemplate+
                                                                    DPGlobal.footTemplate+
                                                            '</table>'+
                                                    '</div>'+
                                                    '<div class="datepicker-years">'+
                                                            '<table class="table-condensed">'+
                                                                    DPGlobal.headTemplate+
                                                                    DPGlobal.contTemplate+
                                                                    DPGlobal.footTemplate+
                                                            '</table>'+
                                                    '</div>'+
                                                    '<div class="datepicker-decades">'+
                                                            '<table class="table-condensed">'+
                                                                    DPGlobal.headTemplate+
                                                                    DPGlobal.contTemplate+
                                                                    DPGlobal.footTemplate+
                                                            '</table>'+
                                                    '</div>'+
                                                    '<div class="datepicker-centuries">'+
                                                            '<table class="table-condensed">'+
                                                                    DPGlobal.headTemplate+
                                                                    DPGlobal.contTemplate+
                                                                    DPGlobal.footTemplate+
                                                            '</table>'+
                                                    '</div>'+
                                            '</div>';

    $.fn.datepicker.DPGlobal = DPGlobal;

    /* DATEPICKER NO CONFLICT
    * =================== */

    $.fn.datepicker.noConflict = function(){
            $.fn.datepicker = old;
            return this;
    };

    /* DATEPICKER VERSION
     * =================== */
    $.fn.datepicker.version = '1.7.1';

    $.fn.datepicker.deprecated = function(msg){
            var console = window.console;
            if (console && console.warn) {
                    console.warn('DEPRECATED: ' + msg);
            }
    };

    /* DATEPICKER DATA-API
    * ================== */

    $(document).on(
            'focus.datepicker.data-api click.datepicker.data-api',
            '[data-provide="datepicker"]',
            function(e){
                    var $this = $(this);
                    if ($this.data('datepicker'))
                            return;
                    e.preventDefault();
                    // component click requires us to explicitly show it
                    datepickerPlugin.call($this, 'show');
            }
    );
    $(function(){
            datepickerPlugin.call($('[data-provide="datepicker-inline"]'));
    });

}));