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	   <h2>calendar-date-core.js</h2>
	
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<h4>Summary</h4>
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        <pre class="sourceview"><span class="comment">/* $Id: calendar-date-core.js 6805 2007-03-30 12:36:39Z slip $ */</span>
<span class="comment">/**
 *
 * Copyright (c) 2004-2006 by Zapatec, Inc.
 * http://www.zapatec.com
 * 1700 MLK Way, Berkeley, California,
 * 94709, U.S.A.
 * All rights reserved.
 */</span>

<span class="comment">// BEGIN: DATE OBJECT PATCHES</span>

<span class="comment">/** \defgroup DateExtras Augmenting the Date object with some utility functions
 * and variables.
 */</span>
<span class="comment">//@{</span>

Date._MD = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]; <span class="comment">/**&lt; Number of days in each month */</span>

Date.SECOND = 1000;		<span class="comment">/**&lt; One second has 1000 milliseconds. */</span>
Date.MINUTE = 60 * Date.SECOND;	<span class="comment">/**&lt; One minute has 60 seconds. */</span>
Date.HOUR   = 60 * Date.MINUTE;	<span class="comment">/**&lt; One hour has 60 minutes. */</span>
Date.DAY    = 24 * Date.HOUR;	<span class="comment">/**&lt; One day has 24 hours. */</span>
Date.WEEK   =  7 * Date.DAY;	<span class="comment">/**&lt; One week has 7 days. */</span>

<span class="comment">/** Returns the number of days in the month.  The \em month parameter is
 * optional; if not passed, the current month of \b this Date object is
 * assumed.
 *
 * <span class="attrib">@param</span> month [int, optional] the month number, 0 for January.
 */</span>
Date.<span class="reserved">prototype</span>.getMonthDays = <span class="reserved">function</span>(month) {
	var year = <span class="reserved">this</span>.getFullYear();
	<span class="reserved">if</span> (typeof month == <span class="literal">"undefined"</span>) {
		month = <span class="reserved">this</span>.getMonth();
	}
	<span class="reserved">if</span> (((0 == (year%4)) &amp;&amp; ( (0 != (year%100)) || (0 == (year%400)))) &amp;&amp; month == 1) {
		<span class="reserved">return</span> 29;
	} <span class="reserved">else</span> {
		<span class="reserved">return</span> Date._MD[month];
	}
};

<span class="comment">/** Returns the number of the current day in the current year. */</span>
Date.<span class="reserved">prototype</span>.getDayOfYear = <span class="reserved">function</span>() {
	var now = new Date(<span class="reserved">this</span>.getFullYear(), <span class="reserved">this</span>.getMonth(), <span class="reserved">this</span>.getDate(), 0, 0, 0);
	var then = new Date(<span class="reserved">this</span>.getFullYear(), 0, 0, 0, 0, 0);
	var time = now - then;
	<span class="reserved">return</span> Math.round(time / Date.DAY);
};

<span class="comment">/** Returns the number of the week in year, as defined in ISO 8601. */</span>
Date.<span class="reserved">prototype</span>.getWeekNumber = <span class="reserved">function</span>() {
	var d = new Date(<span class="reserved">this</span>.getFullYear(), <span class="reserved">this</span>.getMonth(), <span class="reserved">this</span>.getDate(), 0, 0, 0);
	var DoW = d.getDay();
	d.setDate(d.getDate() - (DoW + 6) % 7 + 3); <span class="comment">// Nearest Thu</span>
	var ms = d.valueOf(); <span class="comment">// GMT</span>
	d.setMonth(0);
	d.setDate(4); <span class="comment">// Thu in Week 1</span>
	<span class="reserved">return</span> Math.round((ms - d.valueOf()) / (7 * 864e5)) + 1;
};

<span class="comment">/** Checks dates equality.  Checks time too. */</span>
Date.<span class="reserved">prototype</span>.equalsTo = <span class="reserved">function</span>(date) {
	<span class="reserved">return</span> ((<span class="reserved">this</span>.getFullYear() == date.getFullYear()) &amp;&amp;
		(<span class="reserved">this</span>.getMonth() == date.getMonth()) &amp;&amp;
		(<span class="reserved">this</span>.getDate() == date.getDate()) &amp;&amp;
		(<span class="reserved">this</span>.getHours() == date.getHours()) &amp;&amp;
		(<span class="reserved">this</span>.getMinutes() == date.getMinutes()));
};

<span class="comment">/** Checks dates equality.  Ignores time. */</span>
Date.<span class="reserved">prototype</span>.dateEqualsTo = <span class="reserved">function</span>(date) {
	<span class="reserved">return</span> ((<span class="reserved">this</span>.getFullYear() == date.getFullYear()) &amp;&amp;
		(<span class="reserved">this</span>.getMonth() == date.getMonth()) &amp;&amp;
		(<span class="reserved">this</span>.getDate() == date.getDate()));
};

<span class="comment">/** Set only the year, month, date parts (keep existing time) */</span>
Date.<span class="reserved">prototype</span>.setDateOnly = <span class="reserved">function</span>(date) {
	var tmp = new Date(date);
	<span class="reserved">this</span>.setDate(1);
	<span class="reserved">this</span>.setFullYear(tmp.getFullYear());
	<span class="reserved">this</span>.setMonth(tmp.getMonth());
	<span class="reserved">this</span>.setDate(tmp.getDate());
};

<span class="comment">/** Prints the date in a string according to the given format.
 *
 * The format (\b str) may contain the following specialties:
 *
 * - %%a - Abbreviated weekday name
 * - %%A - Full weekday name
 * - %%b - Abbreviated month name
 * - %%B - Full month name
 * - %%C - Century number
 * - %%d - The day of the month (00 .. 31)
 * - %%e - The day of the month (0 .. 31)
 * - %%H - Hour (00 .. 23)
 * - %%I - Hour (01 .. 12)
 * - %%j - The day of the year (000 .. 366)
 * - %%k - Hour (0 .. 23)
 * - %%l - Hour (1 .. 12)
 * - %%m - Month (01 .. 12)
 * - %%M - Minute (00 .. 59)
 * - %%n - A newline character
 * - %%p - "PM" or "AM"
 * - %%P - "pm" or "am"
 * - %%S - Second (00 .. 59)
 * - %%s - Number of seconds since Epoch
 * - %%t - A tab character
 * - %%W - The week number (as per ISO 8601)
 * - %%u - The day of week (1 .. 7, 1 = Monday)
 * - %%w - The day of week (0 .. 6, 0 = Sunday)
 * - %%y - Year without the century (00 .. 99)
 * - %%Y - Year including the century (ex. 1979)
 * - %%% - A literal %% character
 *
 * They are almost the same as for the POSIX strftime function.
 *
 * <span class="attrib">@param</span> str [string] the format to print date in.
 */</span>
Date.<span class="reserved">prototype</span>.print = <span class="reserved">function</span> (str) {
	var m = <span class="reserved">this</span>.getMonth();
	var d = <span class="reserved">this</span>.getDate();
	var y = <span class="reserved">this</span>.getFullYear();
	var wn = <span class="reserved">this</span>.getWeekNumber();
	var w = <span class="reserved">this</span>.getDay();
	var s = {};
	var hr = <span class="reserved">this</span>.getHours();
	var pm = (hr &gt;= 12);
	var ir = (pm) ? (hr - 12) : hr;
	var dy = <span class="reserved">this</span>.getDayOfYear();
	<span class="reserved">if</span> (ir == 0)
		ir = 12;
	var min = <span class="reserved">this</span>.getMinutes();
	var sec = <span class="reserved">this</span>.getSeconds();
	s[<span class="literal">"%a"</span>] = Zapatec.Calendar.i18n(w, <span class="literal">"sdn"</span>); <span class="comment">// abbreviated weekday name [FIXME: I18N]</span>
	s[<span class="literal">"%A"</span>] = Zapatec.Calendar.i18n(w, <span class="literal">"dn"</span>); <span class="comment">// full weekday name</span>
	s[<span class="literal">"%b"</span>] = Zapatec.Calendar.i18n(m, <span class="literal">"smn"</span>); <span class="comment">// abbreviated month name [FIXME: I18N]</span>
	s[<span class="literal">"%B"</span>] = Zapatec.Calendar.i18n(m, <span class="literal">"mn"</span>); <span class="comment">// full month name</span>
	<span class="comment">// FIXME: %c : preferred date and time representation for the current locale</span>
	s[<span class="literal">"%C"</span>] = 1 + Math.floor(y / 100); <span class="comment">// the century number</span>
	s[<span class="literal">"%d"</span>] = (d &lt; 10) ? (<span class="literal">"0"</span> + d) : d; <span class="comment">// the day of the month (range 01 to 31)</span>
	s[<span class="literal">"%e"</span>] = d; <span class="comment">// the day of the month (range 1 to 31)</span>
	<span class="comment">// FIXME: %D : american date style: %m/%d/%y</span>
	<span class="comment">// FIXME: %E, %F, %G, %g, %h (man strftime)</span>
	s[<span class="literal">"%H"</span>] = (hr &lt; 10) ? (<span class="literal">"0"</span> + hr) : hr; <span class="comment">// hour, range 00 to 23 (24h format)</span>
	s[<span class="literal">"%I"</span>] = (ir &lt; 10) ? (<span class="literal">"0"</span> + ir) : ir; <span class="comment">// hour, range 01 to 12 (12h format)</span>
	s[<span class="literal">"%j"</span>] = (dy &lt; 100) ? ((dy &lt; 10) ? (<span class="literal">"00"</span> + dy) : (<span class="literal">"0"</span> + dy)) : dy; <span class="comment">// day of the year (range 001 to 366)</span>
	s[<span class="literal">"%k"</span>] = hr ? hr :  <span class="literal">"0"</span>; <span class="comment">// hour, range 0 to 23 (24h format)</span>
	s[<span class="literal">"%l"</span>] = ir;		<span class="comment">// hour, range 1 to 12 (12h format)</span>
	s[<span class="literal">"%m"</span>] = (m &lt; 9) ? (<span class="literal">"0"</span> + (1+m)) : (1+m); <span class="comment">// month, range 01 to 12</span>
	s[<span class="literal">"%M"</span>] = (min &lt; 10) ? (<span class="literal">"0"</span> + min) : min; <span class="comment">// minute, range 00 to 59</span>
	s[<span class="literal">"%n"</span>] = <span class="literal">"\n"</span>;		<span class="comment">// a newline character</span>
	s[<span class="literal">"%p"</span>] = pm ? <span class="literal">"PM"</span> : <span class="literal">"AM"</span>;
	s[<span class="literal">"%P"</span>] = pm ? <span class="literal">"pm"</span> : <span class="literal">"am"</span>;
	<span class="comment">// FIXME: %r : the time in am/pm notation %I:%M:%S %p</span>
	<span class="comment">// FIXME: %R : the time in 24-hour notation %H:%M</span>
	s[<span class="literal">"%s"</span>] = Math.floor(<span class="reserved">this</span>.getTime() / 1000);
	s[<span class="literal">"%S"</span>] = (sec &lt; 10) ? (<span class="literal">"0"</span> + sec) : sec; <span class="comment">// seconds, range 00 to 59</span>
	s[<span class="literal">"%t"</span>] = <span class="literal">"\t"</span>;		<span class="comment">// a tab character</span>
	<span class="comment">// FIXME: %T : the time in 24-hour notation (%H:%M:%S)</span>
	s[<span class="literal">"%U"</span>] = s[<span class="literal">"%W"</span>] = s[<span class="literal">"%V"</span>] = (wn &lt; 10) ? (<span class="literal">"0"</span> + wn) : wn;
  s[<span class="literal">"%u"</span>] = (w == 0) ? 7 : w; <span class="comment">// the day of the week (range 1 to 7, 1 = MON)</span>
	s[<span class="literal">"%w"</span>] = w ? w : <span class="literal">"0"</span>;		<span class="comment">// the day of the week (range 0 to 6, 0 = SUN)</span>
	<span class="comment">// FIXME: %x : preferred date representation for the current locale without the time</span>
	<span class="comment">// FIXME: %X : preferred time representation for the current locale without the date</span>
	s[<span class="literal">"%y"</span>] = <span class="literal">''</span> + y % 100; <span class="comment">// year without the century (range 00 to 99)</span>
	<span class="reserved">if</span> (s[<span class="literal">"%y"</span>] &lt; 10) {
		s[<span class="literal">"%y"</span>] = <span class="literal">"0"</span> + s[<span class="literal">"%y"</span>];
	}
	s[<span class="literal">"%Y"</span>] = y;		<span class="comment">// year with the century</span>
	s[<span class="literal">"%%"</span>] = <span class="literal">"%"</span>;		<span class="comment">// a literal '%' character</span>

	var re = /%./g;
	var a = str.match(re) || [];
	<span class="reserved">for</span> (var i = 0; i &lt; a.length; i++) {
		var tmp = s[a[i]];
		<span class="reserved">if</span> (tmp) {
			re = new RegExp(a[i], <span class="literal">'g'</span>);
			str = str.replace(re, tmp);
		}
	}

	<span class="reserved">return</span> str;
};

<span class="comment">/**
 * Parses a date from a string in the specified format.
 * This function requires strict following of the string to 
 * the format template, and any difference causes failure
 * to be returned. Also function refuses to parse formats
 * which containing number rules that have not fixed length
 * and are not separated from the next number rule by any
 * character string, as this requires complication of algorythm
 * and still sometimes is impossible to parse.
 *
 * <span class="attrib">@param</span> str [string] the date as a string
 * <span class="attrib">@param</span> format [string] the format to try to parse the date in
 *
 * <span class="attrib">@return</span> [Date] a date object containing the parsed date or \b null if for
 * some reason the date couldn't be parsed.
 */</span>
Date.parseDate = <span class="reserved">function</span> (str, format) {
	var fmt = format, strPointer = 0, token = null, parseFunc = null, valueLength = null, 
	valueRange = null, valueType = null, date = new Date(), values = {};
	<span class="comment">//need to have a way to determine whether rule is number</span>
	var numberRules = [<span class="literal">"%d"</span>, <span class="literal">"%H"</span>, <span class="literal">"%I"</span>, <span class="literal">"%m"</span>, <span class="literal">"%M"</span>, <span class="literal">"%S"</span>, <span class="literal">"%s"</span>, <span class="literal">"%W"</span>, <span class="literal">"%u"</span>, 
	                       <span class="literal">"%w"</span>, <span class="literal">"%y"</span>, <span class="literal">"%e"</span>, <span class="literal">"%k"</span>, <span class="literal">"%l"</span>, <span class="literal">"%s"</span>, <span class="literal">"%Y"</span>, <span class="literal">"%C"</span>];
	<span class="reserved">function</span> isNumberRule(rule) {
		<span class="reserved">if</span> (Zapatec.Utils.arrIndexOf(numberRules, rule) != -1) {
			<span class="reserved">return</span> true;
		}
		<span class="reserved">return</span> false;
	}
	<span class="comment">//parses string value from translation table</span>
	<span class="reserved">function</span> parseString() {
		<span class="reserved">for</span>(var iString = valueRange[0]; iString &lt; valueRange[1]; ++iString) {
			<span class="comment">//checking if there is translation</span>
			var value = Zapatec.Calendar.i18n(iString, valueType);
			<span class="reserved">if</span> (!value) {
				<span class="reserved">return</span> null;
			}
			<span class="comment">//comparing with our part of the string</span>
			<span class="reserved">if</span> (value == str.substr(strPointer, value.length)) {
				<span class="comment">//increasing string pointer</span>
				valueLength = value.length;
				<span class="reserved">return</span> iString;
			}
		}
		<span class="reserved">return</span> null;
	}
	<span class="comment">//parses the number from beginning of string</span>
	<span class="reserved">function</span> parseNumber() {
		var val = str.substr(strPointer, valueLength);
		<span class="reserved">if</span> (val.length != valueLength || /$\d+^/.test(val)) {
			<span class="reserved">return</span> null;
		}
		<span class="reserved">return</span> parseInt(val, 10);
	}
	<span class="comment">//parses AM PM rule</span>
	<span class="reserved">function</span> parseAMPM() {
		var result = (str.substr(strPointer, valueLength).toLowerCase() == Zapatec.Calendar.i18n(<span class="literal">"pm"</span>, <span class="literal">"ampm"</span>)) ? true : false;
		<span class="reserved">return</span> result || ((str.substr(strPointer, valueLength).toLowerCase() == Zapatec.Calendar.i18n(<span class="literal">"am"</span>, <span class="literal">"ampm"</span>)) ? false : null);
	}
	<span class="comment">//parses formating character</span>
	<span class="reserved">function</span> parseCharacter() {
		<span class="reserved">return</span> <span class="literal">""</span>;
	}
	<span class="comment">//parses the rule to the array</span>
	<span class="reserved">function</span> parseRule(rule) {
		<span class="reserved">return</span> (values[rule] = parseFunc());
	}
	<span class="comment">//function determines if rule value was parsed</span>
	<span class="reserved">function</span> wasParsed(rule) {
		<span class="reserved">if</span> (typeof rule == <span class="literal">"undefined"</span> || rule === null) {
			<span class="reserved">return</span> false;
		}
		<span class="reserved">return</span> true;
	}
	<span class="comment">//gets first defined value or null if no</span>
	<span class="reserved">function</span> getValue() {
		<span class="reserved">for</span>(var i = 0; i &lt; arguments.length; ++i) {
			<span class="reserved">if</span> (arguments[i] !== null &amp;&amp; typeof arguments[i] != <span class="literal">"undefined"</span> &amp;&amp; !isNaN(arguments[i])) {
				<span class="reserved">return</span> arguments[i];
			}
		}
		<span class="reserved">return</span> null;
	}
	<span class="reserved">if</span> (typeof fmt != <span class="literal">"string"</span> || typeof str != <span class="literal">"string"</span> || str == <span class="literal">""</span> || fmt == <span class="literal">""</span>) {
		<span class="reserved">return</span> null;
	}
	<span class="comment">//cycle breaks format into tokens and checks or parses them</span>
	<span class="reserved">while</span>(fmt) {
		<span class="comment">//this is the default value type</span>
		parseFunc = parseNumber;
		<span class="comment">//taking char token(that doesn't hold any information)</span>
		valueLength = fmt.indexOf(<span class="literal">"%"</span>);
		valueLength = (valueLength == -1) ? fmt.length : valueLength;
		token = fmt.slice(0, valueLength);
		<span class="comment">//checking if we have same token in parsed string</span>
		<span class="reserved">if</span> (token != str.substr(strPointer, valueLength)) {
			<span class="reserved">return</span> null;
		}
		<span class="comment">//skiping it</span>
		strPointer += valueLength;
		fmt = fmt.slice(valueLength);
		<span class="reserved">if</span> (fmt == <span class="literal">""</span>) {
			break;
		}
		<span class="comment">//taking formating rule</span>
		token = fmt.slice(0, 2);
		<span class="comment">//this is the default length of value, as it is very often one for rules</span>
		valueLength = 2;
		switch (token) {
			case <span class="literal">"%A"</span> :
			case <span class="literal">"%a"</span> : {
				valueType = (token == <span class="literal">"%A"</span>) ? <span class="literal">"dn"</span> : <span class="literal">"sdn"</span>;
				valueRange = [0, 7];
				parseFunc = parseString;
				break;
			}
			case <span class="literal">"%B"</span> :
			case <span class="literal">"%b"</span> : {
				valueType = (token == <span class="literal">"%B"</span>) ? <span class="literal">"mn"</span> : <span class="literal">"smn"</span>;
				valueRange = [0, 12];
				parseFunc = parseString;
				break;
			}
			case <span class="literal">"%p"</span> : 
			case <span class="literal">"%P"</span> : {
				parseFunc = parseAMPM;
				break;
			}
			case <span class="literal">"%Y"</span> : {
				valueLength = 4;
				<span class="reserved">if</span> (isNumberRule(fmt.substr(2, 2))) {
					<span class="reserved">return</span> null;
				}
				<span class="reserved">while</span>(isNaN(parseInt(str.charAt(strPointer + valueLength - 1))) &amp;&amp; valueLength &gt; 0) {
					--valueLength;
				}
				<span class="reserved">if</span> (valueLength == 0) {break;}
				break;
			}
			case <span class="literal">"%C"</span> : 
			case <span class="literal">"%s"</span> : {
				valueLength = 1;
				<span class="reserved">if</span> (isNumberRule(fmt.substr(2, 2))) {
					<span class="reserved">return</span> null;
				}
				<span class="reserved">while</span>(!isNaN(parseInt(str.charAt(strPointer + valueLength)))) {
					++valueLength;
				}
				break;
			}
			case <span class="literal">"%k"</span> :
			case <span class="literal">"%l"</span> :
			case <span class="literal">"%e"</span> : {
				valueLength = 1;
				<span class="reserved">if</span> (isNumberRule(fmt.substr(2, 2))) {
					<span class="reserved">return</span> null;
				}
				<span class="reserved">if</span> (!isNaN(parseInt(str.charAt(strPointer + 1)))) {
					++valueLength;
				}
				break;
			}
			case <span class="literal">"%j"</span> : valueLength = 3; break;
			case <span class="literal">"%u"</span> : 
			case <span class="literal">"%w"</span> : valueLength = 1;
			case <span class="literal">"%y"</span> :
			case <span class="literal">"%m"</span> :
			case <span class="literal">"%d"</span> :
			case <span class="literal">"%W"</span> :
			case <span class="literal">"%H"</span> :
			case <span class="literal">"%I"</span> : 
			case <span class="literal">"%M"</span> :
			case <span class="literal">"%S"</span> : {
				break;
			}
		}
		<span class="reserved">if</span> (parseRule(token) === null) {
			<span class="reserved">return</span> null;
		}
		<span class="comment">//increasing pointer</span>
		strPointer += valueLength;
		<span class="comment">//skipint it</span>
		fmt = fmt.slice(2);
	}
	<span class="reserved">if</span> (wasParsed(values[<span class="literal">"%s"</span>])) {
		date.setTime(values[<span class="literal">"%s"</span>] * 1000);
	} <span class="reserved">else</span> {
		var year = getValue(values[<span class="literal">"%Y"</span>], values[<span class="literal">"%y"</span>] + --values[<span class="literal">"%C"</span>] * 100, 
		                    values[<span class="literal">"%y"</span>] + (date.getFullYear() - date.getFullYear() % 100),
		                    values[<span class="literal">"%C"</span>] * 100 + date.getFullYear() % 100);
		var month = getValue(values[<span class="literal">"%m"</span>] - 1, values[<span class="literal">"%b"</span>], values[<span class="literal">"%B"</span>]);
		var day = getValue(values[<span class="literal">"%d"</span>] || values[<span class="literal">"%e"</span>]);
		<span class="reserved">if</span> (day === null || month === null) {
			var dayOfWeek = getValue(values[<span class="literal">"%a"</span>], values[<span class="literal">"%A"</span>], values[<span class="literal">"%u"</span>] == 7 ? 0 : values[<span class="literal">"%u"</span>], values[<span class="literal">"%w"</span>]);
		}
		var hour = getValue(values[<span class="literal">"%H"</span>], values[<span class="literal">"%k"</span>]);
		<span class="reserved">if</span> (hour === null &amp;&amp; (wasParsed(values[<span class="literal">"%p"</span>]) || wasParsed(values[<span class="literal">"%P"</span>]))) {
			var pm = getValue(values[<span class="literal">"%p"</span>], values[<span class="literal">"%P"</span>]);
			hour = getValue(values[<span class="literal">"%I"</span>], values[<span class="literal">"%l"</span>]);
			hour = pm ? ((hour == 12) ? 12 : (hour + 12)) : ((hour == 12) ? (0) : hour);
		}
		<span class="reserved">if</span> (year || year === 0) {
			date.setFullYear(year);
		}
		<span class="reserved">if</span> (month || month === 0) {
			date.setMonth(month);
		}
		<span class="reserved">if</span> (day || day === 0) {
			date.setDate(day);
		}
		<span class="reserved">if</span> (wasParsed(values[<span class="literal">"%j"</span>])) {
			date.setMonth(0);
			date.setDate(1);
			date.setDate(values[<span class="literal">"%j"</span>]);
		}
		<span class="reserved">if</span> (wasParsed(dayOfWeek)) {
			date.setDate(date.getDate() + (dayOfWeek - date.getDay()));
		}
		<span class="reserved">if</span> (wasParsed(values[<span class="literal">"%W"</span>])) {
			var weekNumber = date.getWeekNumber();
			<span class="reserved">if</span> (weekNumber != values[<span class="literal">"%W"</span>]) {
				date.setDate(date.getDate() + (values[<span class="literal">"%W"</span>] - weekNumber) * 7);
			}
		}
		<span class="reserved">if</span> (hour !== null) {
			date.setHours(hour);
		}
		<span class="reserved">if</span> (wasParsed(values[<span class="literal">"%M"</span>])) {
			date.setMinutes(values[<span class="literal">"%M"</span>]);
		}
		<span class="reserved">if</span> (wasParsed(values[<span class="literal">"%S"</span>])) {
			date.setSeconds(values[<span class="literal">"%S"</span>]);
		}
	}
	<span class="comment">//printing date in the same format and checking if we'll get the same string</span>
	<span class="reserved">if</span> (date.print(format) != str) {
		<span class="comment">//if not returning error</span>
		<span class="reserved">return</span> null;
	}
	<span class="comment">//or returning parsed date</span>
	<span class="reserved">return</span> date;
};

Date.<span class="reserved">prototype</span>.__msh_oldSetFullYear = Date.<span class="reserved">prototype</span>.setFullYear; <span class="comment">/**&lt; save a reference to the original setFullYear function */</span>

<span class="comment">/**
 * This function replaces the original Date.setFullYear() with a "safer"
 * function which makes sure that the month or date aren't modified (unless in
 * the exceptional case where the date is February 29 but the new year doesn't
 * contain it).
 *
 * <span class="attrib">@param</span> y [int] the new year to move this date to
 */</span>
Date.<span class="reserved">prototype</span>.setFullYear = <span class="reserved">function</span>(y) {
	var d = new Date(<span class="reserved">this</span>);
	d.__msh_oldSetFullYear(y);
	<span class="reserved">if</span> (d.getMonth() != <span class="reserved">this</span>.getMonth())
		<span class="reserved">this</span>.setDate(28);
	<span class="reserved">this</span>.__msh_oldSetFullYear(y);
};

<span class="comment">/**
 * This function compares only years, months and days of two date objects.
 *
 * <span class="attrib">@return</span> [int] -1 if date1&gt;date2, 1 if date2&gt;date1 or 0 if they are equal
 *
 * <span class="attrib">@param</span> date1 [Date] first date to compare
 * <span class="attrib">@param</span> date1 [Date] second date to compare
 */</span>
Date.<span class="reserved">prototype</span>.compareDatesOnly = <span class="reserved">function</span> (date1,date2) { 
	var year1 = date1.getYear();
	var year2 = date2.getYear(); 
	var month1 = date1.getMonth(); 
	var month2 = date2.getMonth(); 
	var day1 = date1.getDate(); 
	var day2 = date2.getDate(); 
	<span class="reserved">if</span> (year1 &gt; year2) { <span class="reserved">return</span> -1;	} 
	<span class="reserved">if</span> (year2 &gt; year1) { <span class="reserved">return</span> 1; } <span class="comment">//years are equal </span>
	<span class="reserved">if</span> (month1 &gt; month2) { <span class="reserved">return</span> -1; } 
	<span class="reserved">if</span> (month2 &gt; month1) { <span class="reserved">return</span> 1; } <span class="comment">//years and months are equal </span>
	<span class="reserved">if</span> (day1 &gt; day2) { <span class="reserved">return</span> -1; } 
	<span class="reserved">if</span> (day2 &gt; day1) { <span class="reserved">return</span> 1; } <span class="comment">//days are equal </span>
	<span class="reserved">return</span> 0; 
}

<span class="comment">//@}</span>

<span class="comment">// END: DATE OBJECT PATCHES</span>
</pre>
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