var dateformater = {};

dateformater = {
    defaults: {
        flat: false,
        starts: 1,
        prev: '◀',
        next: '▶',
        lastSel: false,
        mode: 'single',
        view: 'days',
        calendars: 1,
        format: 'Y-m-d',
        position: 'bottom',
        eventName: 'click',
        onRender: function(){return {};},
        onChange: function(){return true;},
        onShow: function(){return true;},
        onBeforeShow: function(){return true;},
        onHide: function(){return true;},
        locale: {
            days: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"],
            daysShort: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"],
            daysMin: ["Su", "Mo", "Tu", "We", "Th", "Fr", "Sa", "Su"],
            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"],
            weekMin: 'wk'
        }
    },

    getWeekNumber: function (date) {
        var tempDate = new Date(date);
        tempDate.setDate(tempDate.getDate() - (tempDate.getDay() + 6) % 7 + 3);
        var dms = tempDate.valueOf();
        tempDate.setMonth(0);
        tempDate.setDate(4);
        return Math.round((dms - tempDate.valueOf()) / (604800000)) + 1;
    },

    getDayOfYear: function (date) {
        var now = new Date(date.getFullYear(), date.getMonth(), date.getDate(), 0, 0, 0);
        var then = new Date(date.getFullYear(), 0, 0, 0, 0, 0);
        var time = now - then;
        return Math.floor(time / 24*60*60*1000);
    },

    parseDate: function (date, format) {
        if (date.constructor == Date) {
            return new Date(date);
        }
        var parts = date.split(/\W+/);
        var against = format.split(/\W+/), d, m, y, h, min, now = new Date();
        for (var i = 0; i < parts.length; i++) {
            switch (against[i]) {
                case 'd':
                case 'e':
                    d = parseInt(parts[i],10);
                    break;
                case 'm':
                    m = parseInt(parts[i], 10)-1;
                    break;
                case 'Y':
                case 'y':
                    y = parseInt(parts[i], 10);
                    y += y > 100 ? 0 : (y < 29 ? 2000 : 1900);
                    break;
                case 'H':
                case 'I':
                case 'k':
                case 'l':
                    h = parseInt(parts[i], 10);
                    break;
                case 'P':
                case 'p':
                    if (/pm/i.test(parts[i]) && h < 12) {
                        h += 12;
                    } else if (/am/i.test(parts[i]) && h >= 12) {
                        h -= 12;
                    }
                    break;
                case 'M':
                    min = parseInt(parts[i], 10);
                    break;
            }
        }
        return new Date(
            y === undefined ? now.getFullYear() : y,
            m === undefined ? now.getMonth() : m,
            d === undefined ? now.getDate() : d,
            h === undefined ? now.getHours() : h,
            min === undefined ? now.getMinutes() : min,
            0
        );
    },
    formatDate: function(date, format) {
        var m = date.getMonth();
        var d = date.getDate();
        var y = date.getFullYear();
        var wn = dateformater.getWeekNumber(date);
        var w = date.getDay();
        var s = {};
        var hr = date.getHours();
        var pm = (hr >= 12);
        var ir = (pm) ? (hr - 12) : hr;
        var dy = dateformater.getDayOfYear(date);
        if (ir == 0) {
            ir = 12;
        }
        var min = date.getMinutes();
        var sec = date.getSeconds();
        var parts = format.split(''), part;
        for ( var i = 0; i < parts.length; i++ ) {
            part = parts[i];
            switch (parts[i]) {
                case 'a':
                    part = date.getDayName();
                    break;
                case 'A':
                    part = date.getDayName(true);
                    break;
                case 'b':
                    part = date.getMonthName();
                    break;
                case 'B':
                    part = date.getMonthName(true);
                    break;
                case 'C':
                    part = 1 + Math.floor(y / 100);
                    break;
                case 'd':
                    part = (d < 10) ? ("0" + d) : d;
                    break;
                case 'e':
                    part = d;
                    break;
                case 'H':
                    part = (hr < 10) ? ("0" + hr) : hr;
                    break;
                case 'I':
                    part = (ir < 10) ? ("0" + ir) : ir;
                    break;
                case 'j':
                    part = (dy < 100) ? ((dy < 10) ? ("00" + dy) : ("0" + dy)) : dy;
                    break;
                case 'k':
                    part = hr;
                    break;
                case 'l':
                    part = ir;
                    break;
                case 'm':
                    part = (m < 9) ? ("0" + (1+m)) : (1+m);
                    break;
                case 'M':
                    part = (min < 10) ? ("0" + min) : min;
                    break;
                case 'p':
                case 'P':
                    part = pm ? "PM" : "AM";
                    break;
                case 's':
                    part = Math.floor(date.getTime() / 1000);
                    break;
                case 'S':
                    part = (sec < 10) ? ("0" + sec) : sec;
                    break;
                case 'u':
                    part = w + 1;
                    break;
                case 'w':
                    part = w;
                    break;
                case 'y':
                    part = ('' + y).substr(2, 2);
                    break;
                case 'Y':
                    part = y;
                    break;
            }
            parts[i] = part;
        }
        return parts.join('');
    }
};