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* Pikaday\n *\n * Copyright © 2014 David Bushell | BSD & MIT license | https://github.com/Pikaday/Pikaday\n */\n\n(function (root, factory)\n{\n    'use strict';\n\n    var moment;\n    if (typeof exports === 'object') {\n        // CommonJS module\n        // Load moment.js as an optional dependency\n        try { moment = require('moment'); } catch (e) {}\n        module.exports = factory(moment);\n    } else if (typeof define === 'function' && define.amd) {\n        // AMD. Register as an anonymous module.\n        define(function (req)\n        {\n            // Load moment.js as an optional dependency\n            var id = 'moment';\n            try { moment = req(id); } catch (e) {}\n            return factory(moment);\n        });\n    } else {\n        root.Pikaday = factory(root.moment);\n    }\n}(this, function (moment)\n{\n    'use strict';\n\n    /**\n     * feature detection and helper functions\n     */\n    var hasMoment = typeof moment === 'function',\n\n    hasEventListeners = !!window.addEventListener,\n\n    document = window.document,\n\n    sto = window.setTimeout,\n\n    addEvent = function(el, e, callback, capture)\n    {\n        if (hasEventListeners) {\n            el.addEventListener(e, callback, !!capture);\n        } else {\n            el.attachEvent('on' + e, callback);\n        }\n    },\n\n    removeEvent = function(el, e, callback, capture)\n    {\n        if (hasEventListeners) {\n            el.removeEventListener(e, callback, !!capture);\n        } else {\n            el.detachEvent('on' + e, callback);\n        }\n    },\n\n    trim = function(str)\n    {\n        return str.trim ? str.trim() : str.replace(/^\\s+|\\s+$/g,'');\n    },\n\n    hasClass = function(el, cn)\n    {\n        return (' ' + el.className + ' ').indexOf(' ' + cn + ' ') !== -1;\n    },\n\n    addClass = function(el, cn)\n    {\n        if (!hasClass(el, cn)) {\n            el.className = (el.className === '') ? cn : el.className + ' ' + cn;\n        }\n    },\n\n    removeClass = function(el, cn)\n    {\n        el.className = trim((' ' + el.className + ' ').replace(' ' + cn + ' ', ' '));\n    },\n\n    isArray = function(obj)\n    {\n        return (/Array/).test(Object.prototype.toString.call(obj));\n    },\n\n    isDate = function(obj)\n    {\n        return (/Date/).test(Object.prototype.toString.call(obj)) && !isNaN(obj.getTime());\n    },\n\n    isWeekend = function(date)\n    {\n        var day = date.getDay();\n        return day === 0 || day === 6;\n    },\n\n    isLeapYear = function(year)\n    {\n        // solution lifted from date.js (MIT license): https://github.com/datejs/Datejs\n        return ((year % 4 === 0 && year % 100 !== 0) || year % 400 === 0);\n    },\n\n    getDaysInMonth = function(year, month)\n    {\n        return [31, isLeapYear(year) ? 29 : 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][month];\n    },\n\n    setToStartOfDay = function(date)\n    {\n        if (isDate(date)) date.setHours(0,0,0,0);\n    },\n\n    compareDates = function(a,b)\n    {\n        // weak date comparison (use setToStartOfDay(date) to ensure correct result)\n        return a.getTime() === b.getTime();\n    },\n\n    extend = function(to, from, overwrite)\n    {\n        var prop, hasProp;\n        for (prop in from) {\n            hasProp = to[prop] !== undefined;\n            if (hasProp && typeof from[prop] === 'object' && from[prop] !== null && from[prop].nodeName === undefined) {\n                if (isDate(from[prop])) {\n                    if (overwrite) {\n                        to[prop] = new Date(from[prop].getTime());\n                    }\n                }\n                else if (isArray(from[prop])) {\n                    if (overwrite) {\n                        to[prop] = from[prop].slice(0);\n                    }\n                } else {\n                    to[prop] = extend({}, from[prop], overwrite);\n                }\n            } else if (overwrite || !hasProp) {\n                to[prop] = from[prop];\n            }\n        }\n        return to;\n    },\n\n    fireEvent = function(el, eventName, data)\n    {\n        var ev;\n\n        if (document.createEvent) {\n            ev = document.createEvent('HTMLEvents');\n            ev.initEvent(eventName, true, false);\n            ev = extend(ev, data);\n            el.dispatchEvent(ev);\n        } else if (document.createEventObject) {\n            ev = document.createEventObject();\n            ev = extend(ev, data);\n            el.fireEvent('on' + eventName, ev);\n        }\n    },\n\n    adjustCalendar = function(calendar) {\n        if (calendar.month < 0) {\n            calendar.year -= Math.ceil(Math.abs(calendar.month)/12);\n            calendar.month += 12;\n        }\n        if (calendar.month > 11) {\n            calendar.year += Math.floor(Math.abs(calendar.month)/12);\n            calendar.month -= 12;\n        }\n        return calendar;\n    },\n\n    /**\n     * defaults and localisation\n     */\n    defaults = {\n\n        // bind the picker to a form field\n        field: null,\n\n        // automatically show/hide the picker on `field` focus (default `true` if `field` is set)\n        bound: undefined,\n\n        // data-attribute on the input field with an aria assistance text (only applied when `bound` is set)\n        ariaLabel: 'Use the arrow keys to pick a date',\n\n        // position of the datepicker, relative to the field (default to bottom & left)\n        // ('bottom' & 'left' keywords are not used, 'top' & 'right' are modifier on the bottom/left position)\n        position: 'bottom left',\n\n        // automatically fit in the viewport even if it means repositioning from the position option\n        reposition: true,\n\n        // the default output format for `.toString()` and `field` value\n        format: 'YYYY-MM-DD',\n\n        // the toString function which gets passed a current date object and format\n        // and returns a string\n        toString: null,\n\n        // used to create date object from current input string\n        parse: null,\n\n        // the initial date to view when first opened\n        defaultDate: null,\n\n        // make the `defaultDate` the initial selected value\n        setDefaultDate: false,\n\n        // first day of week (0: Sunday, 1: Monday etc)\n        firstDay: 0,\n\n        // minimum number of days in the week that gets week number one\n        // default ISO 8601, week 01 is the week with the first Thursday (4)\n        firstWeekOfYearMinDays: 4,\n\n        // the default flag for moment's strict date parsing\n        formatStrict: false,\n\n        // the minimum/earliest date that can be selected\n        minDate: null,\n        // the maximum/latest date that can be selected\n        maxDate: null,\n\n        // number of years either side, or array of upper/lower range\n        yearRange: 10,\n\n        // show week numbers at head of row\n        showWeekNumber: false,\n\n        // Week picker mode\n        pickWholeWeek: false,\n\n        // used internally (don't config outside)\n        minYear: 0,\n        maxYear: 9999,\n        minMonth: undefined,\n        maxMonth: undefined,\n\n        startRange: null,\n        endRange: null,\n\n        isRTL: false,\n\n        // Additional text to append to the year in the calendar title\n        yearSuffix: '',\n\n        // Render the month after year in the calendar title\n        showMonthAfterYear: false,\n\n        // Render days of the calendar grid that fall in the next or previous month\n        showDaysInNextAndPreviousMonths: false,\n\n        // Allows user to select days that fall in the next or previous month\n        enableSelectionDaysInNextAndPreviousMonths: false,\n\n        // how many months are visible\n        numberOfMonths: 1,\n\n        // when numberOfMonths is used, this will help you to choose where the main calendar will be (default `left`, can be set to `right`)\n        // only used for the first display or when a selected date is not visible\n        mainCalendar: 'left',\n\n        // Specify a DOM element to render the calendar in\n        container: undefined,\n\n        // Blur field when date is selected\n        blurFieldOnSelect : true,\n\n        // internationalization\n        i18n: {\n            previousMonth : 'Previous Month',\n            nextMonth     : 'Next Month',\n            months        : ['January','February','March','April','May','June','July','August','September','October','November','December'],\n            weekdays      : ['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday'],\n            weekdaysShort : ['Sun','Mon','Tue','Wed','Thu','Fri','Sat']\n        },\n\n        // Theme Classname\n        theme: null,\n\n        // events array\n        events: [],\n\n        // callback function\n        onSelect: null,\n        onOpen: null,\n        onClose: null,\n        onDraw: null,\n\n        // Enable keyboard input\n        keyboardInput: true\n    },\n\n\n    /**\n     * templating functions to abstract HTML rendering\n     */\n    renderDayName = function(opts, day, abbr)\n    {\n        day += opts.firstDay;\n        while (day >= 7) {\n            day -= 7;\n        }\n        return abbr ? opts.i18n.weekdaysShort[day] : opts.i18n.weekdays[day];\n    },\n\n    renderDay = function(opts)\n    {\n        var arr = [];\n        var ariaSelected = 'false';\n        if (opts.isEmpty) {\n            if (opts.showDaysInNextAndPreviousMonths) {\n                arr.push('is-outside-current-month');\n\n                if(!opts.enableSelectionDaysInNextAndPreviousMonths) {\n                    arr.push('is-selection-disabled');\n                }\n\n            } else {\n                return '<td class=\"is-empty\"></td>';\n            }\n        }\n        if (opts.isDisabled) {\n            arr.push('is-disabled');\n        }\n        if (opts.isToday) {\n            arr.push('is-today');\n        }\n        if (opts.isSelected) {\n            arr.push('is-selected');\n            ariaSelected = 'true';\n        }\n        if (opts.hasEvent) {\n            arr.push('has-event');\n        }\n        if (opts.isInRange) {\n            arr.push('is-inrange');\n        }\n        if (opts.isStartRange) {\n            arr.push('is-startrange');\n        }\n        if (opts.isEndRange) {\n            arr.push('is-endrange');\n        }\n        return '<td data-day=\"' + opts.day + '\" class=\"' + arr.join(' ') + '\" aria-selected=\"' + ariaSelected + '\">' +\n                 '<button class=\"pika-button pika-day\" type=\"button\" ' +\n                    'data-pika-year=\"' + opts.year + '\" data-pika-month=\"' + opts.month + '\" data-pika-day=\"' + opts.day + '\">' +\n                        opts.day +\n                 '</button>' +\n               '</td>';\n    },\n\n    isoWeek = function(date, firstWeekOfYearMinDays) {\n        // Ensure we're at the start of the day.\n        date.setHours(0, 0, 0, 0);\n\n        // Thursday in current week decides the year because January 4th\n        // is always in the first week according to ISO8601.\n        var yearDay        = date.getDate(),\n            weekDay        = date.getDay(),\n            dayInFirstWeek = firstWeekOfYearMinDays,\n            dayShift       = dayInFirstWeek - 1, // counting starts at 0\n            daysPerWeek    = 7,\n            prevWeekDay    = function(day) { return (day + daysPerWeek - 1) % daysPerWeek; };\n\n        // Adjust to Thursday in week 1 and count number of weeks from date to week 1.\n        date.setDate(yearDay + dayShift - prevWeekDay(weekDay));\n\n        var jan4th      = new Date(date.getFullYear(), 0, dayInFirstWeek),\n            msPerDay    = 24 * 60 * 60 * 1000,\n            daysBetween = (date.getTime() - jan4th.getTime()) / msPerDay,\n            weekNum     = 1 + Math.round((daysBetween - dayShift + prevWeekDay(jan4th.getDay())) / daysPerWeek);\n\n        return weekNum;\n    },\n\n    renderWeek = function (d, m, y, firstWeekOfYearMinDays) {\n        var date = new Date(y, m, d),\n            week = hasMoment ? moment(date).isoWeek() : isoWeek(date, firstWeekOfYearMinDays);\n\n        return '<td class=\"pika-week\">' + week + '</td>';\n    },\n\n    renderRow = function(days, isRTL, pickWholeWeek, isRowSelected)\n    {\n        return '<tr class=\"pika-row' + (pickWholeWeek ? ' pick-whole-week' : '') + (isRowSelected ? ' is-selected' : '') + '\">' + (isRTL ? days.reverse() : days).join('') + '</tr>';\n    },\n\n    renderBody = function(rows)\n    {\n        return '<tbody>' + rows.join('') + '</tbody>';\n    },\n\n    renderHead = function(opts)\n    {\n        var i, arr = [];\n        if (opts.showWeekNumber) {\n            arr.push('<th></th>');\n        }\n        for (i = 0; i < 7; i++) {\n            arr.push('<th scope=\"col\"><abbr title=\"' + renderDayName(opts, i) + '\">' + renderDayName(opts, i, true) + '</abbr></th>');\n        }\n        return '<thead><tr>' + (opts.isRTL ? arr.reverse() : arr).join('') + '</tr></thead>';\n    },\n\n    renderTitle = function(instance, c, year, month, refYear, randId)\n    {\n        var i, j, arr,\n            opts = instance._o,\n            isMinYear = year === opts.minYear,\n            isMaxYear = year === opts.maxYear,\n            html = '<div id=\"' + randId + '\" class=\"pika-title\" role=\"heading\" aria-live=\"assertive\">',\n            monthHtml,\n            yearHtml,\n            prev = true,\n            next = true;\n\n        for (arr = [], i = 0; i < 12; i++) {\n            arr.push('<option value=\"' + (year === refYear ? i - c : 12 + i - c) + '\"' +\n                (i === month ? ' selected=\"selected\"': '') +\n                ((isMinYear && i < opts.minMonth) || (isMaxYear && i > opts.maxMonth) ? ' disabled=\"disabled\"' : '') + '>' +\n                opts.i18n.months[i] + '</option>');\n        }\n\n        monthHtml = '<div class=\"pika-label\">' + opts.i18n.months[month] + '<select class=\"pika-select pika-select-month\" tabindex=\"-1\">' + arr.join('') + '</select></div>';\n\n        if (isArray(opts.yearRange)) {\n            i = opts.yearRange[0];\n            j = opts.yearRange[1] + 1;\n        } else {\n            i = year - opts.yearRange;\n            j = 1 + year + opts.yearRange;\n        }\n\n        for (arr = []; i < j && i <= opts.maxYear; i++) {\n            if (i >= opts.minYear) {\n                arr.push('<option value=\"' + i + '\"' + (i === year ? ' selected=\"selected\"': '') + '>' + (i) + '</option>');\n            }\n        }\n        yearHtml = '<div class=\"pika-label\">' + year + opts.yearSuffix + '<select class=\"pika-select pika-select-year\" tabindex=\"-1\">' + arr.join('') + '</select></div>';\n\n        if (opts.showMonthAfterYear) {\n            html += yearHtml + monthHtml;\n        } else {\n            html += monthHtml + yearHtml;\n        }\n\n        if (isMinYear && (month === 0 || opts.minMonth >= month)) {\n            prev = false;\n        }\n\n        if (isMaxYear && (month === 11 || opts.maxMonth <= month)) {\n            next = false;\n        }\n\n        if (c === 0) {\n            html += '<button class=\"pika-prev' + (prev ? '' : ' is-disabled') + '\" type=\"button\">' + opts.i18n.previousMonth + '</button>';\n        }\n        if (c === (instance._o.numberOfMonths - 1) ) {\n            html += '<button class=\"pika-next' + (next ? '' : ' is-disabled') + '\" type=\"button\">' + opts.i18n.nextMonth + '</button>';\n        }\n\n        return html += '</div>';\n    },\n\n    renderTable = function(opts, data, randId)\n    {\n        return '<table cellpadding=\"0\" cellspacing=\"0\" class=\"pika-table\" role=\"grid\" aria-labelledby=\"' + randId + '\">' + renderHead(opts) + renderBody(data) + '</table>';\n    },\n\n\n    /**\n     * Pikaday constructor\n     */\n    Pikaday = function(options)\n    {\n        var self = this,\n            opts = self.config(options);\n\n        self._onMouseDown = function(e)\n        {\n            if (!self._v) {\n                return;\n            }\n            e = e || window.event;\n            var target = e.target || e.srcElement;\n            if (!target) {\n                return;\n            }\n\n            if (!hasClass(target, 'is-disabled')) {\n                if (hasClass(target, 'pika-button') && !hasClass(target, 'is-empty') && !hasClass(target.parentNode, 'is-disabled')) {\n                    self.setDate(new Date(target.getAttribute('data-pika-year'), target.getAttribute('data-pika-month'), target.getAttribute('data-pika-day')));\n                    if (opts.bound) {\n                        sto(function() {\n                            self.hide();\n                            if (opts.blurFieldOnSelect && opts.field) {\n                                opts.field.blur();\n                            }\n                        }, 100);\n                    }\n                }\n                else if (hasClass(target, 'pika-prev')) {\n                    self.prevMonth();\n                }\n                else if (hasClass(target, 'pika-next')) {\n                    self.nextMonth();\n                }\n            }\n            if (!hasClass(target, 'pika-select')) {\n                // if this is touch event prevent mouse events emulation\n                if (e.preventDefault) {\n                    e.preventDefault();\n                } else {\n                    e.returnValue = false;\n                    return false;\n                }\n            } else {\n                self._c = true;\n            }\n        };\n\n        self._onChange = function(e)\n        {\n            e = e || window.event;\n            var target = e.target || e.srcElement;\n            if (!target) {\n                return;\n            }\n            if (hasClass(target, 'pika-select-month')) {\n                self.gotoMonth(target.value);\n            }\n            else if (hasClass(target, 'pika-select-year')) {\n                self.gotoYear(target.value);\n            }\n        };\n\n        self._onKeyChange = function(e)\n        {\n            e = e || window.event;\n\n            if (self.isVisible()) {\n\n                switch(e.keyCode){\n                    case 13:\n                    case 27:\n                        if (opts.field) {\n                            opts.field.blur();\n                        }\n                        break;\n                    case 37:\n                        self.adjustDate('subtract', 1);\n                        break;\n                    case 38:\n                        self.adjustDate('subtract', 7);\n                        break;\n                    case 39:\n                        self.adjustDate('add', 1);\n                        break;\n                    case 40:\n                        self.adjustDate('add', 7);\n                        break;\n                    case 8:\n                    case 46:\n                        self.setDate(null);\n                        break;\n                }\n            }\n        };\n\n        self._parseFieldValue = function()\n        {\n            if (opts.parse) {\n                return opts.parse(opts.field.value, opts.format);\n            } else if (hasMoment) {\n                var date = moment(opts.field.value, opts.format, opts.formatStrict);\n                return (date && date.isValid()) ? date.toDate() : null;\n            } else {\n                return new Date(Date.parse(opts.field.value));\n            }\n        };\n\n        self._onInputChange = function(e)\n        {\n            var date;\n\n            if (e.firedBy === self) {\n                return;\n            }\n            date = self._parseFieldValue();\n            if (isDate(date)) {\n              self.setDate(date);\n            }\n            if (!self._v) {\n                self.show();\n            }\n        };\n\n        self._onInputFocus = function()\n        {\n            self.show();\n        };\n\n        self._onInputClick = function()\n        {\n            self.show();\n        };\n\n        self._onInputBlur = function()\n        {\n            // IE allows pika div to gain focus; catch blur the input field\n            var pEl = document.activeElement;\n            do {\n                if (hasClass(pEl, 'pika-single')) {\n                    return;\n                }\n            }\n            while ((pEl = pEl.parentNode));\n\n            if (!self._c) {\n                self._b = sto(function() {\n                    self.hide();\n                }, 50);\n            }\n            self._c = false;\n        };\n\n        self._onClick = function(e)\n        {\n            e = e || window.event;\n            var target = e.target || e.srcElement,\n                pEl = target;\n            if (!target) {\n                return;\n            }\n            if (!hasEventListeners && hasClass(target, 'pika-select')) {\n                if (!target.onchange) {\n                    target.setAttribute('onchange', 'return;');\n                    addEvent(target, 'change', self._onChange);\n                }\n            }\n            do {\n                if (hasClass(pEl, 'pika-single') || pEl === opts.trigger) {\n                    return;\n                }\n            }\n            while ((pEl = pEl.parentNode));\n            if (self._v && target !== opts.trigger && pEl !== opts.trigger) {\n                self.hide();\n            }\n        };\n\n        self.el = document.createElement('div');\n        self.el.className = 'pika-single' + (opts.isRTL ? ' is-rtl' : '') + (opts.theme ? ' ' + opts.theme : '');\n\n        addEvent(self.el, 'mousedown', self._onMouseDown, true);\n        addEvent(self.el, 'touchend', self._onMouseDown, true);\n        addEvent(self.el, 'change', self._onChange);\n\n        if (opts.keyboardInput) {\n            addEvent(document, 'keydown', self._onKeyChange);\n        }\n\n        if (opts.field) {\n            if (opts.container) {\n                opts.container.appendChild(self.el);\n            } else if (opts.bound) {\n                document.body.appendChild(self.el);\n            } else {\n                opts.field.parentNode.insertBefore(self.el, opts.field.nextSibling);\n            }\n            addEvent(opts.field, 'change', self._onInputChange);\n\n            if (!opts.defaultDate) {\n                opts.defaultDate = self._parseFieldValue();\n                opts.setDefaultDate = true;\n            }\n        }\n\n        var defDate = opts.defaultDate;\n\n        if (isDate(defDate)) {\n            if (opts.setDefaultDate) {\n                self.setDate(defDate, true);\n            } else {\n                self.gotoDate(defDate);\n            }\n        } else {\n            self.gotoDate(new Date());\n        }\n\n        if (opts.bound) {\n            this.hide();\n            self.el.className += ' is-bound';\n            addEvent(opts.trigger, 'click', self._onInputClick);\n            addEvent(opts.trigger, 'focus', self._onInputFocus);\n            addEvent(opts.trigger, 'blur', self._onInputBlur);\n        } else {\n            this.show();\n        }\n    };\n\n\n    /**\n     * public Pikaday API\n     */\n    Pikaday.prototype = {\n\n\n        /**\n         * configure functionality\n         */\n        config: function(options)\n        {\n            if (!this._o) {\n                this._o = extend({}, defaults, true);\n            }\n\n            var opts = extend(this._o, options, true);\n\n            opts.isRTL = !!opts.isRTL;\n\n            opts.field = (opts.field && opts.field.nodeName) ? opts.field : null;\n\n            opts.theme = (typeof opts.theme) === 'string' && opts.theme ? opts.theme : null;\n\n            opts.bound = !!(opts.bound !== undefined ? opts.field && opts.bound : opts.field);\n\n            opts.trigger = (opts.trigger && opts.trigger.nodeName) ? opts.trigger : opts.field;\n\n            opts.disableWeekends = !!opts.disableWeekends;\n\n            opts.disableDayFn = (typeof opts.disableDayFn) === 'function' ? opts.disableDayFn : null;\n\n            var nom = parseInt(opts.numberOfMonths, 10) || 1;\n            opts.numberOfMonths = nom > 4 ? 4 : nom;\n\n            if (!isDate(opts.minDate)) {\n                opts.minDate = false;\n            }\n            if (!isDate(opts.maxDate)) {\n                opts.maxDate = false;\n            }\n            if ((opts.minDate && opts.maxDate) && opts.maxDate < opts.minDate) {\n                opts.maxDate = opts.minDate = false;\n            }\n            if (opts.minDate) {\n                this.setMinDate(opts.minDate);\n            }\n            if (opts.maxDate) {\n                this.setMaxDate(opts.maxDate);\n            }\n\n            if (isArray(opts.yearRange)) {\n                var fallback = new Date().getFullYear() - 10;\n                opts.yearRange[0] = parseInt(opts.yearRange[0], 10) || fallback;\n                opts.yearRange[1] = parseInt(opts.yearRange[1], 10) || fallback;\n            } else {\n                opts.yearRange = Math.abs(parseInt(opts.yearRange, 10)) || defaults.yearRange;\n                if (opts.yearRange > 100) {\n                    opts.yearRange = 100;\n                }\n            }\n\n            return opts;\n        },\n\n        /**\n         * return a formatted string of the current selection (using Moment.js if available)\n         */\n        toString: function(format)\n        {\n            format = format || this._o.format;\n            if (!isDate(this._d)) {\n                return '';\n            }\n            if (this._o.toString) {\n              return this._o.toString(this._d, format);\n            }\n            if (hasMoment) {\n              return moment(this._d).format(format);\n            }\n            return this._d.toDateString();\n        },\n\n        /**\n         * return a Moment.js object of the current selection (if available)\n         */\n        getMoment: function()\n        {\n            return hasMoment ? moment(this._d) : null;\n        },\n\n        /**\n         * set the current selection from a Moment.js object (if available)\n         */\n        setMoment: function(date, preventOnSelect)\n        {\n            if (hasMoment && moment.isMoment(date)) {\n                this.setDate(date.toDate(), preventOnSelect);\n            }\n        },\n\n        /**\n         * return a Date object of the current selection\n         */\n        getDate: function()\n        {\n            return isDate(this._d) ? new Date(this._d.getTime()) : null;\n        },\n\n        /**\n         * set the current selection\n         */\n        setDate: function(date, preventOnSelect)\n        {\n            if (!date) {\n                this._d = null;\n\n                if (this._o.field) {\n                    this._o.field.value = '';\n                    fireEvent(this._o.field, 'change', { firedBy: this });\n                }\n\n                return this.draw();\n            }\n            if (typeof date === 'string') {\n                date = new Date(Date.parse(date));\n            }\n            if (!isDate(date)) {\n                return;\n            }\n\n            var min = this._o.minDate,\n                max = this._o.maxDate;\n\n            if (isDate(min) && date < min) {\n                date = min;\n            } else if (isDate(max) && date > max) {\n                date = max;\n            }\n\n            this._d = new Date(date.getTime());\n            setToStartOfDay(this._d);\n            this.gotoDate(this._d);\n\n            if (this._o.field) {\n                this._o.field.value = this.toString();\n                fireEvent(this._o.field, 'change', { firedBy: this });\n            }\n            if (!preventOnSelect && typeof this._o.onSelect === 'function') {\n                this._o.onSelect.call(this, this.getDate());\n            }\n        },\n\n        /**\n         * clear and reset the date\n         */\n        clear: function()\n        {\n            this.setDate(null);\n        },\n\n        /**\n         * change view to a specific date\n         */\n        gotoDate: function(date)\n        {\n            var newCalendar = true;\n\n            if (!isDate(date)) {\n                return;\n            }\n\n            if (this.calendars) {\n                var firstVisibleDate = new Date(this.calendars[0].year, this.calendars[0].month, 1),\n                    lastVisibleDate = new Date(this.calendars[this.calendars.length-1].year, this.calendars[this.calendars.length-1].month, 1),\n                    visibleDate = date.getTime();\n                // get the end of the month\n                lastVisibleDate.setMonth(lastVisibleDate.getMonth()+1);\n                lastVisibleDate.setDate(lastVisibleDate.getDate()-1);\n                newCalendar = (visibleDate < firstVisibleDate.getTime() || lastVisibleDate.getTime() < visibleDate);\n            }\n\n            if (newCalendar) {\n                this.calendars = [{\n                    month: date.getMonth(),\n                    year: date.getFullYear()\n                }];\n                if (this._o.mainCalendar === 'right') {\n                    this.calendars[0].month += 1 - this._o.numberOfMonths;\n                }\n            }\n\n            this.adjustCalendars();\n        },\n\n        adjustDate: function(sign, days) {\n\n            var day = this.getDate() || new Date();\n            var difference = parseInt(days)*24*60*60*1000;\n\n            var newDay;\n\n            if (sign === 'add') {\n                newDay = new Date(day.valueOf() + difference);\n            } else if (sign === 'subtract') {\n                newDay = new Date(day.valueOf() - difference);\n            }\n\n            this.setDate(newDay);\n        },\n\n        adjustCalendars: function() {\n            this.calendars[0] = adjustCalendar(this.calendars[0]);\n            for (var c = 1; c < this._o.numberOfMonths; c++) {\n                this.calendars[c] = adjustCalendar({\n                    month: this.calendars[0].month + c,\n                    year: this.calendars[0].year\n                });\n            }\n            this.draw();\n        },\n\n        gotoToday: function()\n        {\n            this.gotoDate(new Date());\n        },\n\n        /**\n         * change view to a specific month (zero-index, e.g. 0: January)\n         */\n        gotoMonth: function(month)\n        {\n            if (!isNaN(month)) {\n                this.calendars[0].month = parseInt(month, 10);\n                this.adjustCalendars();\n            }\n        },\n\n        nextMonth: function()\n        {\n            this.calendars[0].month++;\n            this.adjustCalendars();\n        },\n\n        prevMonth: function()\n        {\n            this.calendars[0].month--;\n            this.adjustCalendars();\n        },\n\n        /**\n         * change view to a specific full year (e.g. \"2012\")\n         */\n        gotoYear: function(year)\n        {\n            if (!isNaN(year)) {\n                this.calendars[0].year = parseInt(year, 10);\n                this.adjustCalendars();\n            }\n        },\n\n        /**\n         * change the minDate\n         */\n        setMinDate: function(value)\n        {\n            if(value instanceof Date) {\n                setToStartOfDay(value);\n                this._o.minDate = value;\n                this._o.minYear  = value.getFullYear();\n                this._o.minMonth = value.getMonth();\n            } else {\n                this._o.minDate = defaults.minDate;\n                this._o.minYear  = defaults.minYear;\n                this._o.minMonth = defaults.minMonth;\n                this._o.startRange = defaults.startRange;\n            }\n\n            this.draw();\n        },\n\n        /**\n         * change the maxDate\n         */\n        setMaxDate: function(value)\n        {\n            if(value instanceof Date) {\n                setToStartOfDay(value);\n                this._o.maxDate = value;\n                this._o.maxYear = value.getFullYear();\n                this._o.maxMonth = value.getMonth();\n            } else {\n                this._o.maxDate = defaults.maxDate;\n                this._o.maxYear = defaults.maxYear;\n                this._o.maxMonth = defaults.maxMonth;\n                this._o.endRange = defaults.endRange;\n            }\n\n            this.draw();\n        },\n\n        setStartRange: function(value)\n        {\n            this._o.startRange = value;\n        },\n\n        setEndRange: function(value)\n        {\n            this._o.endRange = value;\n        },\n\n        /**\n         * refresh the HTML\n         */\n        draw: function(force)\n        {\n            if (!this._v && !force) {\n                return;\n            }\n            var opts = this._o,\n                minYear = opts.minYear,\n                maxYear = opts.maxYear,\n                minMonth = opts.minMonth,\n                maxMonth = opts.maxMonth,\n                html = '',\n                randId;\n\n            if (this._y <= minYear) {\n                this._y = minYear;\n                if (!isNaN(minMonth) && this._m < minMonth) {\n                    this._m = minMonth;\n                }\n            }\n            if (this._y >= maxYear) {\n                this._y = maxYear;\n                if (!isNaN(maxMonth) && this._m > maxMonth) {\n                    this._m = maxMonth;\n                }\n            }\n\n            for (var c = 0; c < opts.numberOfMonths; c++) {\n                randId = 'pika-title-' + Math.random().toString(36).replace(/[^a-z]+/g, '').substr(0, 2);\n                html += '<div class=\"pika-lendar\">' + renderTitle(this, c, this.calendars[c].year, this.calendars[c].month, this.calendars[0].year, randId) + this.render(this.calendars[c].year, this.calendars[c].month, randId) + '</div>';\n            }\n\n            this.el.innerHTML = html;\n\n            if (opts.bound) {\n                if(opts.field.type !== 'hidden') {\n                    sto(function() {\n                        opts.trigger.focus();\n                    }, 1);\n                }\n            }\n\n            if (typeof this._o.onDraw === 'function') {\n                this._o.onDraw(this);\n            }\n\n            if (opts.bound) {\n                // let the screen reader user know to use arrow keys\n                opts.field.setAttribute('aria-label', opts.ariaLabel);\n            }\n        },\n\n        adjustPosition: function()\n        {\n            var field, pEl, width, height, viewportWidth, viewportHeight, scrollTop, left, top, clientRect, leftAligned, bottomAligned;\n\n            if (this._o.container) return;\n\n            this.el.style.position = 'absolute';\n\n            field = this._o.trigger;\n            pEl = field;\n            width = this.el.offsetWidth;\n            height = this.el.offsetHeight;\n            viewportWidth = window.innerWidth || document.documentElement.clientWidth;\n            viewportHeight = window.innerHeight || document.documentElement.clientHeight;\n            scrollTop = window.pageYOffset || document.body.scrollTop || document.documentElement.scrollTop;\n            leftAligned = true;\n            bottomAligned = true;\n\n            if (typeof field.getBoundingClientRect === 'function') {\n                clientRect = field.getBoundingClientRect();\n                left = clientRect.left + window.pageXOffset;\n                top = clientRect.bottom + window.pageYOffset;\n            } else {\n                left = pEl.offsetLeft;\n                top  = pEl.offsetTop + pEl.offsetHeight;\n                while((pEl = pEl.offsetParent)) {\n                    left += pEl.offsetLeft;\n                    top  += pEl.offsetTop;\n                }\n            }\n\n            // default position is bottom & left\n            if ((this._o.reposition && left + width > viewportWidth) ||\n                (\n                    this._o.position.indexOf('right') > -1 &&\n                    left - width + field.offsetWidth > 0\n                )\n            ) {\n                left = left - width + field.offsetWidth;\n                leftAligned = false;\n            }\n            if ((this._o.reposition && top + height > viewportHeight + scrollTop) ||\n                (\n                    this._o.position.indexOf('top') > -1 &&\n                    top - height - field.offsetHeight > 0\n                )\n            ) {\n                top = top - height - field.offsetHeight;\n                bottomAligned = false;\n            }\n\n            this.el.style.left = left + 'px';\n            this.el.style.top = top + 'px';\n\n            addClass(this.el, leftAligned ? 'left-aligned' : 'right-aligned');\n            addClass(this.el, bottomAligned ? 'bottom-aligned' : 'top-aligned');\n            removeClass(this.el, !leftAligned ? 'left-aligned' : 'right-aligned');\n            removeClass(this.el, !bottomAligned ? 'bottom-aligned' : 'top-aligned');\n        },\n\n        /**\n         * render HTML for a particular month\n         */\n        render: function(year, month, randId)\n        {\n            var opts   = this._o,\n                now    = new Date(),\n                days   = getDaysInMonth(year, month),\n                before = new Date(year, month, 1).getDay(),\n                data   = [],\n                row    = [];\n            setToStartOfDay(now);\n            if (opts.firstDay > 0) {\n                before -= opts.firstDay;\n                if (before < 0) {\n                    before += 7;\n                }\n            }\n            var previousMonth = month === 0 ? 11 : month - 1,\n                nextMonth = month === 11 ? 0 : month + 1,\n                yearOfPreviousMonth = month === 0 ? year - 1 : year,\n                yearOfNextMonth = month === 11 ? year + 1 : year,\n                daysInPreviousMonth = getDaysInMonth(yearOfPreviousMonth, previousMonth);\n            var cells = days + before,\n                after = cells;\n            while(after > 7) {\n                after -= 7;\n            }\n            cells += 7 - after;\n            var isWeekSelected = false;\n            for (var i = 0, r = 0; i < cells; i++)\n            {\n                var day = new Date(year, month, 1 + (i - before)),\n                    isSelected = isDate(this._d) ? compareDates(day, this._d) : false,\n                    isToday = compareDates(day, now),\n                    hasEvent = opts.events.indexOf(day.toDateString()) !== -1 ? true : false,\n                    isEmpty = i < before || i >= (days + before),\n                    dayNumber = 1 + (i - before),\n                    monthNumber = month,\n                    yearNumber = year,\n                    isStartRange = opts.startRange && compareDates(opts.startRange, day),\n                    isEndRange = opts.endRange && compareDates(opts.endRange, day),\n                    isInRange = opts.startRange && opts.endRange && opts.startRange < day && day < opts.endRange,\n                    isDisabled = (opts.minDate && day < opts.minDate) ||\n                                 (opts.maxDate && day > opts.maxDate) ||\n                                 (opts.disableWeekends && isWeekend(day)) ||\n                                 (opts.disableDayFn && opts.disableDayFn(day));\n\n                if (isEmpty) {\n                    if (i < before) {\n                        dayNumber = daysInPreviousMonth + dayNumber;\n                        monthNumber = previousMonth;\n                        yearNumber = yearOfPreviousMonth;\n                    } else {\n                        dayNumber = dayNumber - days;\n                        monthNumber = nextMonth;\n                        yearNumber = yearOfNextMonth;\n                    }\n                }\n\n                var dayConfig = {\n                        day: dayNumber,\n                        month: monthNumber,\n                        year: yearNumber,\n                        hasEvent: hasEvent,\n                        isSelected: isSelected,\n                        isToday: isToday,\n                        isDisabled: isDisabled,\n                        isEmpty: isEmpty,\n                        isStartRange: isStartRange,\n                        isEndRange: isEndRange,\n                        isInRange: isInRange,\n                        showDaysInNextAndPreviousMonths: opts.showDaysInNextAndPreviousMonths,\n                        enableSelectionDaysInNextAndPreviousMonths: opts.enableSelectionDaysInNextAndPreviousMonths\n                    };\n\n                if (opts.pickWholeWeek && isSelected) {\n                    isWeekSelected = true;\n                }\n\n                row.push(renderDay(dayConfig));\n\n                if (++r === 7) {\n                    if (opts.showWeekNumber) {\n                        row.unshift(renderWeek(i - before, month, year, opts.firstWeekOfYearMinDays));\n                    }\n                    data.push(renderRow(row, opts.isRTL, opts.pickWholeWeek, isWeekSelected));\n                    row = [];\n                    r = 0;\n                    isWeekSelected = false;\n                }\n            }\n            return renderTable(opts, data, randId);\n        },\n\n        isVisible: function()\n        {\n            return this._v;\n        },\n\n        show: function()\n        {\n            if (!this.isVisible()) {\n                this._v = true;\n                this.draw();\n                removeClass(this.el, 'is-hidden');\n                if (this._o.bound) {\n                    addEvent(document, 'click', this._onClick);\n                    this.adjustPosition();\n                }\n                if (typeof this._o.onOpen === 'function') {\n                    this._o.onOpen.call(this);\n                }\n            }\n        },\n\n        hide: function()\n        {\n            var v = this._v;\n            if (v !== false) {\n                if (this._o.bound) {\n                    removeEvent(document, 'click', this._onClick);\n                }\n\n                if (!this._o.container) {\n                    this.el.style.position = 'static'; // reset\n                    this.el.style.left = 'auto';\n                    this.el.style.top = 'auto';\n                }\n                addClass(this.el, 'is-hidden');\n                this._v = false;\n                if (v !== undefined && typeof this._o.onClose === 'function') {\n                    this._o.onClose.call(this);\n                }\n            }\n        },\n\n        /**\n         * GAME OVER\n         */\n        destroy: function()\n        {\n            var opts = this._o;\n\n            this.hide();\n            removeEvent(this.el, 'mousedown', this._onMouseDown, true);\n            removeEvent(this.el, 'touchend', this._onMouseDown, true);\n            removeEvent(this.el, 'change', this._onChange);\n            if (opts.keyboardInput) {\n                removeEvent(document, 'keydown', this._onKeyChange);\n            }\n            if (opts.field) {\n                removeEvent(opts.field, 'change', this._onInputChange);\n                if (opts.bound) {\n                    removeEvent(opts.trigger, 'click', this._onInputClick);\n                    removeEvent(opts.trigger, 'focus', this._onInputFocus);\n                    removeEvent(opts.trigger, 'blur', this._onInputBlur);\n                }\n            }\n            if (this.el.parentNode) {\n                this.el.parentNode.removeChild(this.el);\n            }\n        }\n\n    };\n\n    return Pikaday;\n}));\n"]}