/* Simulates PHP's date function
 * http://jacwright.com/projects/javascript/date_format
 */
Date.prototype.format = function(format) {
    var returnStr = '';
    var replace = Date.replaceChars;
    for (var i = 0; i < format.length; i++) {
        var curChar = format.charAt(i);
        if (replace[curChar]) {
            returnStr += replace[curChar].call(this);
        } else {
            returnStr += curChar;
        }
    }
    return returnStr;
};
Date.replaceChars = {
    shortMonths: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
    longMonths: ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'],
    shortDays: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],
    longDays: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],

    // Day
    d: function() {
        return (this.getDate() < 10 ? '0' : '') + this.getDate();
    },
    D: function() {
        return Date.replaceChars.shortDays[this.getDay()];
    },
    j: function() {
        return this.getDate();
    },
    l: function() {
        return Date.replaceChars.longDays[this.getDay()];
    },
    N: function() {
        return this.getDay() + 1;
    },
    S: function() {
        return (this.getDate() % 10 == 1 && this.getDate() != 11 ? 'st' : (this.getDate() % 10 == 2 && this.getDate() != 12 ? 'nd' : (this.getDate() % 10 == 3 && this.getDate() != 13 ? 'rd' : 'th')));
    },
    w: function() {
        return this.getDay();
    },
    z: function() {
        return "Not Yet Supported";
    },
    // Week
    W: function() {
        return "Not Yet Supported";
    },
    // Month
    F: function() {
        return Date.replaceChars.longMonths[this.getMonth()];
    },
    m: function() {
        return (this.getMonth() < 11 ? '0' : '') + (this.getMonth() + 1);
    },
    M: function() {
        return Date.replaceChars.shortMonths[this.getMonth()];
    },
    n: function() {
        return this.getMonth() + 1;
    },
    t: function() {
        return "Not Yet Supported";
    },
    // Year
    L: function() {
        return "Not Yet Supported";
    },
    o: function() {
        return "Not Supported";
    },
    Y: function() {
        return this.getFullYear();
    },
    y: function() {
        return ('' + this.getFullYear()).substr(2);
    },
    // Time
    a: function() {
        return this.getHours() < 12 ? 'am' : 'pm';
    },
    A: function() {
        return this.getHours() < 12 ? 'AM' : 'PM';
    },
    B: function() {
        return "Not Yet Supported";
    },
    g: function() {
        return this.getHours() % 12 || 12;
    },
    G: function() {
        return this.getHours();
    },
    h: function() {
        return ((this.getHours() % 12 || 12) < 10 ? '0' : '') + (this.getHours() % 12 || 12);
    },
    H: function() {
        return (this.getHours() < 10 ? '0' : '') + this.getHours();
    },
    i: function() {
        return (this.getMinutes() < 10 ? '0' : '') + this.getMinutes();
    },
    s: function() {
        return (this.getSeconds() < 10 ? '0' : '') + this.getSeconds();
    },
    // Timezone
    e: function() {
        return "Not Yet Supported";
    },
    I: function() {
        return "Not Supported";
    },
    O: function() {
        return (this.getTimezoneOffset() < 0 ? '-' : '+') + (this.getTimezoneOffset() / 60 < 10 ? '0' : '') + (this.getTimezoneOffset() / 60) + '00';
    },
    T: function() {
        return "Not Yet Supported";
    },
    Z: function() {
        return this.getTimezoneOffset() * 60;
    },
    // Full Date/Time
    c: function() {
        return "Not Yet Supported";
    },
    r: function() {
        return this.toString();
    },
    U: function() {
        return this.getTime() / 1000;
    }
};