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鐃緒申速鐃緒申鐃藷タ￥申鐃春ワ申鐃緒申鐃緒申鐃緒申鐃緒申鐃� :: Safari鐃緒申Date#setMonth鐃緒申鐃出ワ申鐃獣てわ申鐃塾わ申prototype鐃緒申颪④鐃緒申仆茲件申討澆鐃�

JavaScript鐃緒申Date鐃緒申鐃瞬ワ申鐃緒申鐃緒申鐃夙わ申date.setMonth(-1)鐃夙わ申鐃夙￥申鐃緒申年鐃緒申12鐃緒申砲鐃緒申討鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃淑のでわ申鐃緒申鐃緒申Safari鐃叔常申蠅�逸申鐃緒申覆鐃緒申辰鐃緒申蠅刻申鐃処う鐃淑のわ申prototype鐃緒申颪④鐃緒申仆茲件申討澆泙鐃緒申鐃緒申鐃�

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Core JavaScript 1.5 Reference:Global Objects:Date:setMonth - MDC

monthValue

An integer between 0 and 11 (representing the months January through December).

dayValue

An integer from 1 to 31, representing the day of the month.

鐃塾わ申鐃祝￥申

If a parameter you specify is outside of the expected range, setMonth attempts to update the date information in the Date object accordingly. For example, if you use 15 for monthValue, the year will be incremented by 1 (year + 1), and 3 will be used for month.

鐃夙￥申> 11鐃塾常申鐃塾常申鐃熟書いてわ申鐃獣ても、&lt 0 鐃塾常申鐃熟書いてなわ申鐃緒申

鐃渋際￥申鐃瞬逸申鐃緒申鐃緒申廚鐃緒申鐃緒申鐃緒申鐃銃わ申鐃殉わ申鐃夙￥申鐃緒申鐃緒申鐃緒申鐃緒申鐃所が発鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申辰討鐃緒申鐃塾わ申鐃緒申

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鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申椽鐃緒申鐃緒申Entry鐃塾ワ申鐃緒申鐃夙ワ申砲鐃緒申鐃緒申鐃緒申討鐃緒申鐃淑わ申鐃塾でわ申鐃暑。鐃緒申郢逸申鐃緒申鐃緒申鐃緒申箸鐃緒申鐃緒申里鐃渋醐申澆鐃緒申覆鐃緒申鐃緒申鐃緒申鐃叔わ申鐃緒申鐃緒申鐃夙�申鐃緒申覆鐃緒申鐃緒申鷭酋鐃緒申鐃緒申鐃緒申佞鐃緒申錣件申鐃緒申里鐃緒申鐃�30鐃緒申鐃緒申鐃淑のわ申鐃緒申31鐃緒申鐃緒申鐃淑のわ申鐃緒申

鐃淑駕申鐃緒申鐃銃種申存鐃緒申鐃�

var Stdout = function(id){
   this.elem  = document.getElementById(id);
   this.clear = function(){    this.elem.innerHTML = '' };
   this.puts  = function(str){ this.elem.innerHTML += str + '<br>' };
};
var stdout = new Stdout('stdout');
stdout.clear();
var date;
date = new Date('Tue, 01 Jan 2008 12:34:56 GMT+0900');
stdout.puts(date);
date.setMonth(11);
stdout.puts(date);
date.setMonth(-1);
stdout.puts(date);
date = new Date('Mon, 31 Mar 2008 12:34:56 GMT+0900');
stdout.puts(date);
date.setMonth(-1);
stdout.puts(date);
date = new Date('Fri, 29 Feb 2008 12:34:56 GMT+0900');
stdout.puts(date);
date.setYear(-1)
stdout.puts(date);

鐃夙にわ申鐃緒申鐃緒申鐃瞬逸申鐃緒申鐃緒申廚箸鐃緒申鐃緒申里蓮鐃緒申丱鐃緒申鐃緒申擇鐃塾てなわ申鐃緒申鐃緒申鐃緒申鐃緒申鐃夙思わ申鐃緒申鐃緒申鐃緒申鐃�Javascript鐃祝限っわ申鐃獣ではなわ申鐃緒申

Dan the Man with Too Many Dates Forgotten

鐃緒申鐃緒申鐃夙逸申鐃緒申 (1)

- 1. nanto_vi
- 2006年10鐃緒申25鐃緒申 22:07
- JavaScript (鐃夙わ申鐃緒申鐃緒申鐃� ECMAScript) 鐃緒申 Date 鐃熟件申鐃緒申鐃緒申鐃緒申鐃緒申鐃叔わ申鐃殉わ申鐃緒申
  ECMAScript 鐃叔は￥申年鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申箸鐃緒申鐃� Epoch 鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃竣誌申鐃緒申鐃緒申鐃緒申鐃緒申鐃舜随申 MakeDay(year, month, date) 鐃緒申鐃緒申鐃緒申鐃緒申鐃銃わ申鐃緒申 (ECMA-262 3rd 15.9.1.12)鐃緒申setMonth 鐃盾こ鐃緒申鐃緒申鐃緒申僂鐃緒申討鐃緒申泙鐃緒申鐃� (同 15.9.5.38)鐃緒申鐃緒申鐃緒申鐃緒申鐃� yaer = year + floor(month / 12), month = month modulo 12 鐃夙わ申鐃獣わ申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃峻わ申鐃銃わ申鐃殉わ申鐃緒申
  鐃叔わ申鐃塾で￥申鐃緒申鐃緒申鐃緒申呂鐃緒申鐃緒申箸鐃緒申討發㍼申鐃緒申鐃夙緒申鐃緒申鐃緒申鐃曙、鐃緒申鐃粛緒申鐃緒申鐃緒申鐃曙た鐃夙わ申鐃緒申侶鐃縮わ申鐃瞬ってわ申鐃緒申呂鐃緒申任鐃� (鐃緒申鐃曙が鐃緒申鐃緒申鐃縮りか鐃熟わ申鐃銃わ申鐃緒申鐃緒申)鐃緒申
  鐃淑わ申鐃緒申floor鐃緒申modulo 鐃緒申 ECMA-262 3rd 5.2 鐃緒申鐃緒申鐃緒申鐃銃わ申鐃殉わ申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申砲鐃緒申鐃� -1 modulo 12 鐃緒申 11 鐃緒申鐃瞬わ申鐃殉わ申鐃緒申

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javascript - (new Date).setMonth(-1)鐃塾随申鐃緒申鐃緒申

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1. [javascrip]Date鐃殉とわ申

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javascript - (new Date).setMonth(-1)鐃塾随申鐃緒申鐃緒申

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1. [javascrip]Date鐃殉とわ申

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