/**

 * @author Sławomir Kokłowski {@link http://www.kurshtml.boo.pl}

 * @copyright NIE usuwaj tego komentarza! (Do NOT remove this comment!)

 */



Date.prototype.date = function(format)

{

    for (var i = 0, c = '', returner = '', formats = new Object(); i < format.length; i++)

    {

        c = format.charAt(i);

        if (c == '\\' && i + 1 < format.length) returner += format.charAt(++i);

        else if (typeof formats[c] != 'undefined') returner += formats[c];

        else

        {

            switch (c)

            {

                case 'a':

                    formats[c] = this.getHours() < 12 ? 'przed południem' : 'po południu';

                    break;

                case 'd':

                    var day = this.getDate();

                    formats[c] = (day < 10 ? '0' : '') + day;

                    break;

                case 'D':

                    var days = new Array('Nie', 'Pon', 'Wto', 'Śro', 'Czw', 'Pią', 'Sob');

                    formats[c] = days[this.getDay()];

                    break;

                case 'E':

                    var month = new Array('stycznia', 'lutego', 'marca', 'kwietnia', 'maja', 'czerwca', 'lipca', 'sierpnia', 'września', 'października', 'listopada', 'grudnia');

                    formats[c] = month[this.getMonth()];

                    break;

                case 'F':

                    var month = new Array('Styczeń', 'Luty', 'Marzec', 'Kwiecień', 'Maj', 'Czerwiec', 'Lipiec', 'Sierpień', 'Wrzesień', 'Październik', 'Listopad', 'Grudzień');

                    formats[c] = month[this.getMonth()];

                    break;

                case 'g':

                    formats[c] = (this.getHours() - 1) % 12 + 1;

                    break;

                case 'G':

                    formats[c] = this.getHours();

                    break;

                case 'h':

                    var hour = (this.getHours() - 1) % 12 + 1;

                    formats[c] = (hour < 10 ? '0' : '') + hour;

                    break;

                case 'H':

                    var hour = this.getHours();

                    formats[c] = (hour < 10 ? '0' : '') + hour;

                    break;

                case 'i':

                    var minute = this.getMinutes();

                    formats[c] = (minute < 10 ? '0' : '') + minute;

                    break;

                case 'j':

                    formats[c] = this.getDate();

                    break;

                case 'l':

                    var days = new Array('Niedziela', 'Poniedziałek', 'Wtorek', 'Środa', 'Czwartek', 'Piątek', 'Sobota');

                    formats[c] = days[this.getDay()];

                    break;

                case 'L':

                    formats[c] = this.getFullYear() % 4 ? 0 : 1;

                    break;

                case 'm':

                    var month = this.getMonth() + 1;

                    formats[c] = (month < 10 ? '0' : '') + month;

                    break;

                case 'M':

                    var month = new Array('Sty', 'Lut', 'Mar', 'Kwi', 'Maj', 'Cze', 'Lip', 'Sień', 'Wrz', 'Paź', 'Lis', 'Gru');

                    formats[c] = month[this.getMonth()];

                    break;

                case 'n':

                    formats[c] = this.getMonth() + 1;

                    break;

                case 'O':

                    var O = -this.getTimezoneOffset() / 60;

                    if (O < 0)

                    {

                        var sign = '-';

                        O = -O;

                    }

                    else sign = '+';

                    formats[c] = sign + (O < 10 ? '0' : '') + O + '00';

                    break;

                case 'r':

                    formats[c] = this.date('D, d M Y H:i:s O');

                    break;

                case 's':

                    var second = this.getSeconds();

                    formats[c] = (second < 10 ? '0' : '') + second;

                    break;

                case 'S':

                    if (this.getDate().toString().search(/(^|[02-9])1$/) != -1) formats[c] = '-wszy';

                    else if (this.getDate().toString().search(/(^|[02-9])2$/) != -1) formats[c] = '-gi';

                    else if (this.getDate().toString().search(/(^|[02-9])3$/) != -1) formats[c] = '-ci';

                    else if (this.getDate().toString().search(/(^|[02-9])[78]$/) != -1) formats[c] = '-my';

                    else formats[c] = '-ty';

                    break;

                case 't':

                    var months = new Array(31, this.getFullYear() % 4 ? 28 : 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);

                    formats[c] = months[this.getMonth()];

                    break;

                case 'U':

                    formats[c] = Date.parse(this) / 1000;

                    break;

                case 'w':

                    formats[c] = this.getDay();

                    break;

                case 'W':

                    var day = this.getDay() - 1;

                    if (day == -1) day = 6;

                    formats[c] = Math.round((this.date('z') - day + 6) / 7);

                    if (formats[c] == 0)

                    {

                        var date = new Date(this.getFullYear() - 1, 11, 31, 23, 59, 59);

                        day = date.getDay() - 1;

                        if (day == -1) day = 6;

                        formats[c] = Math.round((date.date('z') - day + 6) / 7);

                    }

                    else

                    {

                        var date = new Date(this.getFullYear(), 11, 31, 23, 59, 59);

                        day = date.getDay() - 1;

                        if (day == -1) day = 6;

                        if (day < 3 && this.date('z') >= date.date('z') - day) formats[c] = 1;

                    }

                    break;

                case 'Y':

                    formats[c] = this.getFullYear();

                    break;

                case 'y':

                    formats[c] = this.getFullYear().toString().substring(2);

                    break;

                case 'z':

                    var months = new Array(31, this.getFullYear() % 4 ? 28 : 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);

                    formats[c] = this.getDate();

                    for (var j = 0, month = this.getMonth(); j < month; j++) formats[c] += months[j];

                    break;

                case 'Z':

                    formats[c] = -this.getTimezoneOffset() * 60;

                    break;

                default:

                    formats[c] = c;

                    break;

            }

            returner += formats[c];

        }

    }



    return returner;

}