// Simulates PHP's date function
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() == 0 ? 12 : (this.getHours() > 12 ? this.getHours() - 12 : this.getHours()); },
    G: function() { return this.getHours(); },
    h: function() { return (this.getHours() < 10 || (12 < this.getHours() < 22) ? '0' : '') + (this.getHours() < 10 ? this.getHours() + 1 : this.getHours() - 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; }
};

var dates = {
    convert: function(d) {
        return (
            d.constructor === Date ? d :
            d.constructor === Array ? new Date(d[0], d[1], d[2]) :
            d.constructor === Number ? new Date(d) :
            d.constructor === String ? new Date(d) :
            typeof d === "object" ? new Date(d.year, d.month, d.date) :
            NaN
        );
    },
    compare: function(a, b) {
        return (
            isFinite(a = this.convert(a).valueOf()) &&
            isFinite(b = this.convert(b).valueOf()) ?
            (a > b) - (a < b) :
            NaN
        );
    },
    inRange: function(d, start, end) {
        return (
            isFinite(d = this.convert(d).valueOf()) &&
            isFinite(start = this.convert(start).valueOf()) &&
            isFinite(end = this.convert(end).valueOf()) ?
            start <= d && d <= end :
            NaN
        );
    }
}